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1. Direct linearly polarized electroluminescence from perovskite nanoplatelet superlattices

Author

Ye, Junzhi, Ren, Aobo, Dai, Linjie, Baikie, Tomi K., Guo, Renjun, Pal, Debapriya, Gorgon, Sebastian, Heger, Julian E., Huang, Junyang, Sun, Yuqi, Arul, Rakesh, Grimaldi, Gianluca, Zhang, Kaiwen, Shamsi, Javad, Huang, Yi-Teng, Wang, Hao, Wu, Jiang, Koenderink, A. Femius, Torrente Murciano, Laura, Schwartzkopf, Matthias, Roth, Stephen V., Müller-Buschbaum, Peter, Baumberg, Jeremy J., Stranks, Samuel D., Greenham, Neil C., Polavarapu, Lakshminarayana, Zhang, Wei, Rao, Akshay, and Hoye, Robert L. Z.

Published
2024
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2. Spontaneous symmetry breaking in plasmon lattice lasers

Author

Fortman, Nelson de Gaay, Kolkowski, Radoslaw, Pal, Debapriya, Rodriguez, Said R. K., Schall, Peter, and Koenderink, A. Femius

Subjects
Physics - Optics
Abstract

Spontaneous symmetry breaking (SSB) is key for our understanding of phase transitions and the spontaneous emergence of order. Photonics provide versatile systems to study SSB. In this work, we report that for a two-dimensional (2D) periodic nonlocal metasurface with gain, SSB occurs in the lasing transition, breaking parity symmetry. We study diffractive hexagonal plasmon nanoparticle lattices, where the K-points in momentum space provide two modes that are exactly degenerate in frequency and identically distributed in space. Using femtosecond pulses to energize the gain medium, we simultaneously capture single shot realspace and wavevector resolved Fourier images of laser emission. By combining Fourier- and real-space, we resolve the two order parameters for which symmetry breaking simultaneously occurs: spatial parity and U(1) (rotational) symmetry breaking, evident respectively as random relative mode amplitude and phase. Thereby, we quantify for the first time SSB in 2D periodic metasurfaces. These currently receive much interest as experimentally accessible implementations of seminal solid-state physics Hamiltonians and provide a large design space for exploring SSB in scenarios with different symmetries, mode degeneracies and topological properties. The methodology reported in this work is generally applicable to 2D plasmonic and dielectric metasurfaces and opens numerous opportunities for the study of SSB and emergence of spatial coherence in metaphotonics., Comment: Main manuscript (4 figures, 19 pages) and appended to it supplementary information (with 6 supplementary figures)

Published
2023

3. Direct Linearly-Polarised Electroluminescence from Perovskite Nanoplatelet Superlattices

Author

Ye, Junzhi, Ren, Aobo, Dai, Linjie, Baikie, Tomi, Guo, Renjun, Pal, Debapriya, Gorgon, Sebastian, Heger, Julian E., Huang, Junyang, Sun, Yuqi, Arul, Rakesh, Grimaldi, Gianluca, Zhang, Kaiwen, Shamsi, Javad, Huang, Yi-Teng, Wang, Hao, Wu, Jiang, Koenderink, A. Femius, Murciano, Laura Torrente, Schwartzkopf, Matthias, Roth, Stephen V., Muller-Buschbaum, Peter, Baumberg, Jeremy J., Stranks, Samuel D., Greenham, Neil C., Polavarapu, Lakshminarayana, Zhang, Wei, Rao, Akshay, and Hoye, Robert L. Z.

Subjects
Physics - Optics, Condensed Matter - Materials Science
Abstract

Polarised light is critical for a wide range of applications, but is usually generated by filtering unpolarised light, which leads to significant energy losses and requires additional optics. Herein, the direct emission of linearly-polarised light is achieved from light-emitting diodes (LEDs) made of CsPbI3 perovskite nanoplatelet superlattices. Through use of solvents with different vapour pressures, the self-assembly of perovskite nanoplatelets is achieved to enable fine control over the orientation (either face-up or edge-up) and therefore the transition dipole moment. As a result of the highly-uniform alignment of the nanoplatelets, as well as their strong quantum and dielectric confinement, large exciton fine-structure splitting is achieved at the film level, leading to pure-red LEDs exhibiting a high degree of linear polarisation of 74.4% without any photonic structures. This work unveils the possibilities of perovskite nanoplatelets as a highly promising source of linearly-polarised electroluminescence, opening up the development of next-generation 3D displays and optical communications from this highly versatile, solution-processable system., Comment: 26 pages, 5 figures

Published
2023
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4. Cold Atoms in Space: Community Workshop Summary and Proposed Road-Map

Author

Alonso, Ivan, Alpigiani, Cristiano, Altschul, Brett, Araujo, Henrique, Arduini, Gianluigi, Arlt, Jan, Badurina, Leonardo, Balaz, Antun, Bandarupally, Satvika, Barone, Barry C Barish Michele, Barsanti, Michele, Bass, Steven, Bassi, Angelo, Battelier, Baptiste, Baynham, Charles F. A., Beaufils, Quentin, Belic, Aleksandar, Berge, Joel, Bernabeu, Jose, Bertoldi, Andrea, Bingham, Robert, Bize, Sebastien, Blas, Diego, Bongs, Kai, Bouyer, Philippe, Braitenberg, Carla, Brand, Christian, Braxmaier, Claus, Bresson, Alexandre, Buchmueller, Oliver, Budker, Dmitry, Bugalho, Luıs, Burdin, Sergey, Callegari, Luigi Cacciapuoti Simone, Calmet, Xavier, Calonico, Davide, Canuel, Benjamin, Caramete, Laurentiu-Ioan, Carraz, Olivier, Cassettari, Donatella, Chakraborty, Pratik, Chattopadhyay, Swapan, Chauhan, Upasna, Chen, Xuzong, Chen, Yu-Ao, Chiofalo, Maria Luisa, Coleman, Jonathon, Corgier, Robin, Cotter, J. P., Cruise, A. Michael, Cui, Yanou, Davies, Gavin, De Roeck, Albert, Demarteau, Marcel, Derevianko, Andrei, Di Clemente, Marco, Djordjevic, Goran S., Donadi, Sandro, Dore, Olivier, Dornan, Peter, Doser, Michael, Drougakis, Giannis, Dunningham, Jacob, Easo, Sajan, Eby, Joshua, Elertas, Gedminas, Ellis, John, Evans, David, Examilioti, Pandora, Fadeev, Pavel, Fanı, Mattia, Fassi, Farida, Fattori, Marco, Fedderke, Michael A., Felea, Daniel, Feng, Chen-Hao, Ferreras, Jorge, Flack, Robert, Flambaum, Victor V., Forsberg, Rene, Fromhold, Mark, Gaaloul, Naceur, Garraway, Barry M., Georgousi, Maria, Geraci, Andrew, Gibble, Kurt, Gibson, Valerie, Gill, Patrick, Giudice, Gian F., Goldwin, Jon, Gould, Oliver, Grachov, Oleg, Graham, Peter W., Grasso, Dario, Griffin, Paul F., Guerlin, Christine, Gundogan, Mustafa, Gupta, Ratnesh K, Haehnelt, Martin, Hanımeli, Ekim T., Hawkins, Leonie, Hees, Aurelien, Henderson, Victoria A., Herr, Waldemar, Herrmann, Sven, Hird, Thomas, Hobson, Richard, Hock, Vincent, Hogan, Jason M., Holst, Bodil, Holynski, Michael, Israelsson, Ulf, Jeglic, Peter, Jetzer, Philippe, Juzeliunas, Gediminas, Kaltenbaek, Rainer, Kamenik, Jernej F., Kehagias, Alex, Kirova, Teodora, Kiss-Toth, Marton, Koke, Sebastian, Kolkowitz, Shimon, Kornakov, Georgy, Kovachy, Tim, Krutzik, Markus, Kumar, Mukesh, Kumar, Pradeep, Lammerzahl, Claus, Landsberg, Greg, Poncin-Lafitte, Christophe Le, Leibrandt, David R., Leveque, Thomas, Lewicki, Marek, Li, Rui, Lipniacka, Anna, Liu, Christian Lisdat Mia, Lopez-Gonzalez, J. L., Loriani, Sina, Louko, Jorma, Luciano, Giuseppe Gaetano, Lundblad, Nathan, Maddox, Steve, Mahmoud, M. A., Maleknejad, Azadeh, March-Russell, John, Massonnet, Didier, McCabe, Christopher, Meister, Matthias, Meznarsic, Tadej, Micalizio, Salvatore, Migliaccio, Federica, Millington, Peter, Milosevic, Milan, Mitchell, Jeremiah, Morley, Gavin W., Muller, Jurgen, Murphy, Eamonn, Mustecaplıoglu, Ozgur E., OShea, Val, Oi, Daniel K. L., Olson, Judith, Pal, Debapriya, Papazoglou, Dimitris G., Pasatembou, Elizabeth, Paternostro, Mauro, Pawlowski, Krzysztof, Pelucchi, Emanuele, Santos, Franck Pereira dos, Peters, Achim, Pikovski, Igor, Pilaftsis, Apostolos, Pinto, Alexandra, Prevedelli, Marco, Puthiya-Veettil, Vishnupriya, Quenby, John, Rafelski, Johann, Rasel, Ernst M., Ravensbergen, Cornelis, Reguzzoni, Mirko, Richaud, Andrea, Riou, Isabelle, Rothacher, Markus, Roura, Albert, Ruschhaupt, Andreas, Sabulsky, Dylan O., Safronova, Marianna, Saltas, Ippocratis D., Salvi, Leonardo, Sameed, Muhammed, Saurabh, Pandey, Schaffer, Stefan, Schiller, Stephan, Schilling, Manuel, Schkolnik, Vladimir, Schlippert, Dennis, Schmidt, Piet O., Schnatz, Harald, Schneider, Jean, Schneider, Ulrich, Schreck, Florian, Schubert, Christian, Shayeghi, Armin, Sherrill, Nathaniel, Shipsey, Ian, Signorini, Carla, Singh, Rajeev, Singh, Yeshpal, Skordis, Constantinos, Smerzi, Augusto, Sopuerta, Carlos F., Sorrentino, Fiodor, Sphicas, Paraskevas, Stadnik, Yevgeny V., Stefanescu, Petruta, Tarallo, Marco G., Tentindo, Silvia, Tino, Guglielmo M., Tinsley, Jonathan N., Tornatore, Vincenza, Treutlein, Philipp, Trombettoni, Andrea, Tsai, Yu-Dai, Tuckey, Philip, Uchida, Melissa A, Valenzuela, Tristan, Bossche, Mathias Van Den, Vaskonen, Ville, Verma, Gunjan, Vetrano, Flavio, Vogt, Christian, von Klitzing, Wolf, Waller, Pierre, Walser, Reinhold, Williams, Eric Wille Jason, Windpassinger, Patrick, Wittrock, Ulric, Wolf, Peter, Woltmann, Marian, Worner, Lisa, Xuereb, Andre, Yahia, Mohamed, Yazgan, Efe, Yu, Nan, Zahzam, Nassim, Cruzeiro, Emmanuel Zambrini, Zhan, Mingsheng, Zou, Xinhao, Zupan, Jure, and Zupanic, Erik

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Atomic Physics
Abstract

We summarize the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportunities offered by their deployment in space, and the developments needed before cold atoms could be operated in space. The cold atom technologies discussed include atomic clocks, quantum gravimeters and accelerometers, and atom interferometers. Prospective applications include metrology, geodesy and measurement of terrestrial mass change due to, e.g., climate change, and fundamental science experiments such as tests of the equivalence principle, searches for dark matter, measurements of gravitational waves and tests of quantum mechanics. We review the current status of cold atom technologies and outline the requirements for their space qualification, including the development paths and the corresponding technical milestones, and identifying possible pathfinder missions to pave the way for missions to exploit the full potential of cold atoms in space. Finally, we present a first draft of a possible road-map for achieving these goals, that we propose for discussion by the interested cold atom, Earth Observation, fundamental physics and other prospective scientific user communities, together with ESA and national space and research funding agencies., Comment: Summary of the Community Workshop on Cold Atoms in Space and corresponding Road-map: https://indico.cern.ch/event/1064855/

Published
2022
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5. Direct observation of the effects of spin dependent momentum of light in optical tweezers

Author

Pal, Debapriya, Gupta, Subhasish Dutta, Ghosh, Nirmalya, and Banerjee, Ayan

Subjects
Physics - Optics
Abstract

We demonstrate that tight focusing of a circularly polarized Gaussian beam in optical tweezers leads to spin-momentum locking - with the transverse spin angular momentum density being independent of helicity, while the transverse momentum (Poynting vector) becomes helicity dependent. Our theoretical calculations, numerical simulations, and experiments reveal that the presence of a stratified medium in the path of the trapping beam significantly enhances the magnitude of transverse momentum in the radial direction with respect to the beam axis, and likewise, also leads to high off-axial intensity. This overlap allows us to experimentally observe the circular motion of a birefringent particle, trapped off-axis, in response to an input circularly polarized fundamental Gaussian beam carrying no intrinsic orbital angular momentum. The circular motion is dependent on the helicity of the input beam, so that we can identify it to be the signature of the elusive Belinfante spin in propagating light beams obtained in our optical tweezers setup. Our work can be extended to higher-order beams carrying intrinsic orbital angular momentum leading to simple routes of achieving complex particle manipulation using optical tweezers., Comment: 15 pages, 6 figures

Published
2020

6. Limiting distribution of periodic position measurements of a quantum harmonic oscillator

Author

Acharya, Arnab, Pal, Debapriya, Banerjee, Soumitro, and Dasgupta, Ananda

Subjects
Quantum Physics
Abstract

We consider a particle in harmonic oscillator potential, whose position is periodically measured with an instrument of finite precision. We show that the distribution of the measured positions tends to a limiting distribution when the number of measurements tends to infinity. We derive the expression for the limiting position distribution and validate it with numerical simulation.

Published
2019
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7. AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space

Author

El-Neaj, Yousef Abou, Alpigiani, Cristiano, Amairi-Pyka, Sana, Araujo, Henrique, Balaz, Antun, Bassi, Angelo, Bathe-Peters, Lars, Battelier, Baptiste, Belic, Aleksandar, Bentine, Elliot, Bernabeu, Jose, Bertoldi, Andrea, Bingham, Robert, Blas, Diego, Bolpasi, Vasiliki, Bongs, Kai, Bose, Sougato, Bouyer, Philippe, Bowcock, Themis, Bowden, William, Buchmueller, Oliver, Burrage, Clare, Calmet, Xavier, Canuel, Benjamin, Caramete, Laurentiu-Ioan, Carroll, Andrew, Cella, Giancarlo, Charmandaris, Vassilis, Chattopadhyay, Swapan, Chen, Xuzong, Chiofalo, Maria Luisa, Coleman, Jonathon, Cotter, Joseph, Cui, Yanou, Derevianko, Andrei, De Roeck, Albert, Djordjevic, Goran, Dornan, Peter, Doser, Michael, Drougkakis, Ioannis, Dunningham, Jacob, Dutan, Ioana, Easo, Sajan, Elertas, Gedminas, Ellis, John, Sawy, Mai El, Fassi, Farida, Felea, Daniel, Feng, Chen-Hao, Flack, Robert, Foot, Chris, Fuentes, Ivette, Gaaloul, Naceur, Gauguet, Alexandre, Geiger, Remi, Gibson, Valerie, Giudice, Gian, Goldwin, Jon, Grachov, Oleg, Graham, Peter W., Grasso, Dario, van der Grinten, Maurits, Gundogan, Mustafa, Haehnelt, Martin G., Harte, Tiffany, Hees, Aurelien, Hobson, Richard, Holst, Bodil, Hogan, Jason, Kasevich, Mark, Kavanagh, Bradley J., von Klitzing, Wolf, Kovachy, Tim, Krikler, Benjamin, Krutzik, Markus, Lewicki, Marek, Lien, Yu-Hung, Liu, Miaoyuan, Luciano, Giuseppe Gaetano, Magnon, Alain, Mahmoud, Mohammed, Malik, Sarah, McCabe, Christopher, Mitchell, Jeremiah, Pahl, Julia, Pal, Debapriya, Pandey, Saurabh, Papazoglou, Dimitris, Paternostro, Mauro, Penning, Bjoern, Peters, Achim, Prevedelli, Marco, Puthiya-Veettil, Vishnupriya, Quenby, John, Rasel, Ernst, Ravenhall, Sean, Sfar, Haifa Rejeb, Ringwood, Jack, Roura, Albert, Sabulsky, Dylan, Sameed, Muhammed, Sauer, Ben, Schaffer, Stefan Alaric, Schiller, Stephan, Schkolnik, Vladimir, Schlippert, Dennis, Schubert, Christian, Shayeghi, Armin, Shipsey, Ian, Signorini, Carla, Soares-Santos, Marcelle, Sorrentino, Fiodor, Singh, Yajpal, Sumner, Timothy, Tassis, Konstantinos, Tentindo, Silvia, Tino, Guglielmo Maria, Tinsley, Jonathan N., Unwin, James, Valenzuela, Tristan, Vasilakis, Georgios, Vaskonen, Ville, Vogt, Christian, Webber-Date, Alex, Wenzlawski, Andre, Windpassinger, Patrick, Woltmann, Marian, Holynski, Michael, Yazgan, Efe, Zhan, Ming-Sheng, Zou, Xinhao, and Zupan, Jure

Subjects
General Relativity and Quantum Cosmology, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Atomic Physics
Abstract

We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive ranges of LISA and the terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment for Dark Matter and Gravity Exploration (AEDGE), will also complement other planned searches for dark matter, and exploit synergies with other gravitational wave detectors. We give examples of the extended range of sensitivity to ultra-light dark matter offered by AEDGE, and how its gravitational-wave measurements could explore the assembly of super-massive black holes, first-order phase transitions in the early universe and cosmic strings. AEDGE will be based upon technologies now being developed for terrestrial experiments using cold atoms, and will benefit from the space experience obtained with, e.g., LISA and cold atom experiments in microgravity. This paper is based on a submission (v1) in response to the Call for White Papers for the Voyage 2050 long-term plan in the ESA Science Programme. ESA limited the number of White Paper authors to 30. However, in this version (v2) we have welcomed as supporting authors participants in the Workshop on Atomic Experiments for Dark Matter and Gravity Exploration held at CERN: ({\tt https://indico.cern.ch/event/830432/}), as well as other interested scientists, and have incorporated additional material., Comment: V2 -- added support authors

Published
2019
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8. Rapid Calculation of the Number of [Pi]-Bonds, [Sigma]-Bonds, Single and Triple Bonds in Aliphatic Unsaturated Open Chain and Cycloalkynes

Author

Das, Arijit, Adhikari, Suman, Pal, Debapriya, Paul, Bijaya, Sanjeev, R., and Jagannadham, V.

Abstract

Prediction of number of [Pi]-bonds, [sigma]-bonds, single and triple bonds of aliphatic unsaturated open-chain and cycloalkynes is a vitally important tool for students of chemistry at undergraduate and graduate level for solving different kinds of problems regarding different chemical reactions. In this manuscript, we try to present a simple and innovative method for easy calculation of number of [Pi]-bonds, [sigma]-bonds, single and triple bonds with the help of completely 8 (eight) new formulae.

Published
2014

9. AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space

Author

El-Neaj, Yousef Abou, Alpigiani, Cristiano, Amairi-Pyka, Sana, Araújo, Henrique, Balaž, Antun, Bassi, Angelo, Bathe-Peters, Lars, Battelier, Baptiste, Belić, Aleksandar, Bentine, Elliot, Bernabeu, José, Bertoldi, Andrea, Bingham, Robert, Blas, Diego, Bolpasi, Vasiliki, Bongs, Kai, Bose, Sougato, Bouyer, Philippe, Bowcock, Themis, Bowden, William, Buchmueller, Oliver, Burrage, Clare, Calmet, Xavier, Canuel, Benjamin, Caramete, Laurentiu-Ioan, Carroll, Andrew, Cella, Giancarlo, Charmandaris, Vassilis, Chattopadhyay, Swapan, Chen, Xuzong, Chiofalo, Maria Luisa, Coleman, Jonathon, Cotter, Joseph, Cui, Yanou, Derevianko, Andrei, De Roeck, Albert, Djordjevic, Goran S., Dornan, Peter, Doser, Michael, Drougkakis, Ioannis, Dunningham, Jacob, Dutan, Ioana, Easo, Sajan, Elertas, Gedminas, Ellis, John, El Sawy, Mai, Fassi, Farida, Felea, Daniel, Feng, Chen-Hao, Flack, Robert, Foot, Chris, Fuentes, Ivette, Gaaloul, Naceur, Gauguet, Alexandre, Geiger, Remi, Gibson, Valerie, Giudice, Gian, Goldwin, Jon, Grachov, Oleg, Graham, Peter W., Grasso, Dario, van der Grinten, Maurits, Gündogan, Mustafa, Haehnelt, Martin G., Harte, Tiffany, Hees, Aurélien, Hobson, Richard, Hogan, Jason, Holst, Bodil, Holynski, Michael, Kasevich, Mark, Kavanagh, Bradley J., von Klitzing, Wolf, Kovachy, Tim, Krikler, Benjamin, Krutzik, Markus, Lewicki, Marek, Lien, Yu-Hung, Liu, Miaoyuan, Luciano, Giuseppe Gaetano, Magnon, Alain, Mahmoud, Mohammed Attia, Malik, Sarah, McCabe, Christopher, Mitchell, Jeremiah, Pahl, Julia, Pal, Debapriya, Pandey, Saurabh, Papazoglou, Dimitris, Paternostro, Mauro, Penning, Bjoern, Peters, Achim, Prevedelli, Marco, Puthiya-Veettil, Vishnupriya, Quenby, John, Rasel, Ernst, Ravenhall, Sean, Ringwood, Jack, Roura, Albert, Sabulsky, Dylan, Sameed, Muhammed, Sauer, Ben, Schäffer, Stefan Alaric, Schiller, Stephan, Schkolnik, Vladimir, Schlippert, Dennis, Schubert, Christian, Sfar, Haifa Rejeb, Shayeghi, Armin, Shipsey, Ian, Signorini, Carla, Singh, Yeshpal, Soares-Santos, Marcelle, Sorrentino, Fiodor, Sumner, Timothy, Tassis, Konstantinos, Tentindo, Silvia, Tino, Guglielmo Maria, Tinsley, Jonathan N., Unwin, James, Valenzuela, Tristan, Vasilakis, Georgios, Vaskonen, Ville, Vogt, Christian, Webber-Date, Alex, Wenzlawski, André, Windpassinger, Patrick, Woltmann, Marian, Yazgan, Efe, Zhan, Ming-Sheng, Zou, Xinhao, and Zupan, Jure

Published
2020
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10. Cold atoms in space: community workshop summary and proposed road-map

Author

Alonso, Iván, primary, Alpigiani, Cristiano, additional, Altschul, Brett, additional, Araújo, Henrique, additional, Arduini, Gianluigi, additional, Arlt, Jan, additional, Badurina, Leonardo, additional, Balaž, Antun, additional, Bandarupally, Satvika, additional, Barish, Barry C., additional, Barone, Michele, additional, Barsanti, Michele, additional, Bass, Steven, additional, Bassi, Angelo, additional, Battelier, Baptiste, additional, Baynham, Charles F. A., additional, Beaufils, Quentin, additional, Belić, Aleksandar, additional, Bergé, Joel, additional, Bernabeu, Jose, additional, Bertoldi, Andrea, additional, Bingham, Robert, additional, Bize, Sébastien, additional, Blas, Diego, additional, Bongs, Kai, additional, Bouyer, Philippe, additional, Braitenberg, Carla, additional, Brand, Christian, additional, Braxmaier, Claus, additional, Bresson, Alexandre, additional, Buchmueller, Oliver, additional, Budker, Dmitry, additional, Bugalho, Luís, additional, Burdin, Sergey, additional, Cacciapuoti, Luigi, additional, Callegari, Simone, additional, Calmet, Xavier, additional, Calonico, Davide, additional, Canuel, Benjamin, additional, Caramete, Laurentiu-Ioan, additional, Carraz, Olivier, additional, Cassettari, Donatella, additional, Chakraborty, Pratik, additional, Chattopadhyay, Swapan, additional, Chauhan, Upasna, additional, Chen, Xuzong, additional, Chen, Yu-Ao, additional, Chiofalo, Maria Luisa, additional, Coleman, Jonathon, additional, Corgier, Robin, additional, Cotter, J. P., additional, Michael Cruise, A., additional, Cui, Yanou, additional, Davies, Gavin, additional, De Roeck, Albert, additional, Demarteau, Marcel, additional, Derevianko, Andrei, additional, Di Clemente, Marco, additional, Djordjevic, Goran S., additional, Donadi, Sandro, additional, Doré, Olivier, additional, Dornan, Peter, additional, Doser, Michael, additional, Drougakis, Giannis, additional, Dunningham, Jacob, additional, Easo, Sajan, additional, Eby, Joshua, additional, Elertas, Gedminas, additional, Ellis, John, additional, Evans, David, additional, Examilioti, Pandora, additional, Fadeev, Pavel, additional, Fanì, Mattia, additional, Fassi, Farida, additional, Fattori, Marco, additional, Fedderke, Michael A., additional, Felea, Daniel, additional, Feng, Chen-Hao, additional, Ferreras, Jorge, additional, Flack, Robert, additional, Flambaum, Victor V., additional, Forsberg, René, additional, Fromhold, Mark, additional, Gaaloul, Naceur, additional, Garraway, Barry M., additional, Georgousi, Maria, additional, Geraci, Andrew, additional, Gibble, Kurt, additional, Gibson, Valerie, additional, Gill, Patrick, additional, Giudice, Gian F., additional, Goldwin, Jon, additional, Gould, Oliver, additional, Grachov, Oleg, additional, Graham, Peter W., additional, Grasso, Dario, additional, Griffin, Paul F., additional, Guerlin, Christine, additional, Gündoğan, Mustafa, additional, Gupta, Ratnesh K., additional, Haehnelt, Martin, additional, Hanımeli, Ekim T., additional, Hawkins, Leonie, additional, Hees, Aurélien, additional, Henderson, Victoria A., additional, Herr, Waldemar, additional, Herrmann, Sven, additional, Hird, Thomas, additional, Hobson, Richard, additional, Hock, Vincent, additional, Hogan, Jason M., additional, Holst, Bodil, additional, Holynski, Michael, additional, Israelsson, Ulf, additional, Jeglič, Peter, additional, Jetzer, Philippe, additional, Juzeliūnas, Gediminas, additional, Kaltenbaek, Rainer, additional, Kamenik, Jernej F., additional, Kehagias, Alex, additional, Kirova, Teodora, additional, Kiss-Toth, Marton, additional, Koke, Sebastian, additional, Kolkowitz, Shimon, additional, Kornakov, Georgy, additional, Kovachy, Tim, additional, Krutzik, Markus, additional, Kumar, Mukesh, additional, Kumar, Pradeep, additional, Lämmerzahl, Claus, additional, Landsberg, Greg, additional, Le Poncin-Lafitte, Christophe, additional, Leibrandt, David R., additional, Lévèque, Thomas, additional, Lewicki, Marek, additional, Li, Rui, additional, Lipniacka, Anna, additional, Lisdat, Christian, additional, Liu, Mia, additional, Lopez-Gonzalez, J. L., additional, Loriani, Sina, additional, Louko, Jorma, additional, Luciano, Giuseppe Gaetano, additional, Lundblad, Nathan, additional, Maddox, Steve, additional, Mahmoud, M. A., additional, Maleknejad, Azadeh, additional, March-Russell, John, additional, Massonnet, Didier, additional, McCabe, Christopher, additional, Meister, Matthias, additional, Mežnaršič, Tadej, additional, Micalizio, Salvatore, additional, Migliaccio, Federica, additional, Millington, Peter, additional, Milosevic, Milan, additional, Mitchell, Jeremiah, additional, Morley, Gavin W., additional, Müller, Jürgen, additional, Murphy, Eamonn, additional, Müstecaplıoğlu, Özgür E., additional, O’Shea, Val, additional, Oi, Daniel K. L., additional, Olson, Judith, additional, Pal, Debapriya, additional, Papazoglou, Dimitris G., additional, Pasatembou, Elizabeth, additional, Paternostro, Mauro, additional, Pawlowski, Krzysztof, additional, Pelucchi, Emanuele, additional, Pereira dos Santos, Franck, additional, Peters, Achim, additional, Pikovski, Igor, additional, Pilaftsis, Apostolos, additional, Pinto, Alexandra, additional, Prevedelli, Marco, additional, Puthiya-Veettil, Vishnupriya, additional, Quenby, John, additional, Rafelski, Johann, additional, Rasel, Ernst M., additional, Ravensbergen, Cornelis, additional, Reguzzoni, Mirko, additional, Richaud, Andrea, additional, Riou, Isabelle, additional, Rothacher, Markus, additional, Roura, Albert, additional, Ruschhaupt, Andreas, additional, Sabulsky, Dylan O., additional, Safronova, Marianna, additional, Saltas, Ippocratis D., additional, Salvi, Leonardo, additional, Sameed, Muhammed, additional, Saurabh, Pandey, additional, Schäffer, Stefan, additional, Schiller, Stephan, additional, Schilling, Manuel, additional, Schkolnik, Vladimir, additional, Schlippert, Dennis, additional, Schmidt, Piet O., additional, Schnatz, Harald, additional, Schneider, Jean, additional, Schneider, Ulrich, additional, Schreck, Florian, additional, Schubert, Christian, additional, Shayeghi, Armin, additional, Sherrill, Nathaniel, additional, Shipsey, Ian, additional, Signorini, Carla, additional, Singh, Rajeev, additional, Singh, Yeshpal, additional, Skordis, Constantinos, additional, Smerzi, Augusto, additional, Sopuerta, Carlos F., additional, Sorrentino, Fiodor, additional, Sphicas, Paraskevas, additional, Stadnik, Yevgeny V., additional, Stefanescu, Petruta, additional, Tarallo, Marco G., additional, Tentindo, Silvia, additional, Tino, Guglielmo M., additional, Tinsley, Jonathan N., additional, Tornatore, Vincenza, additional, Treutlein, Philipp, additional, Trombettoni, Andrea, additional, Tsai, Yu-Dai, additional, Tuckey, Philip, additional, Uchida, Melissa A., additional, Valenzuela, Tristan, additional, Van Den Bossche, Mathias, additional, Vaskonen, Ville, additional, Verma, Gunjan, additional, Vetrano, Flavio, additional, Vogt, Christian, additional, von Klitzing, Wolf, additional, Waller, Pierre, additional, Walser, Reinhold, additional, Wille, Eric, additional, Williams, Jason, additional, Windpassinger, Patrick, additional, Wittrock, Ulrich, additional, Wolf, Peter, additional, Woltmann, Marian, additional, Wörner, Lisa, additional, Xuereb, André, additional, Yahia, Mohamed, additional, Yazgan, Efe, additional, Yu, Nan, additional, Zahzam, Nassim, additional, Zambrini Cruzeiro, Emmanuel, additional, Zhan, Mingsheng, additional, Zou, Xinhao, additional, Zupan, Jure, additional, and Zupanič, Erik, additional

Published
2022
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11. Nanopatterning of Perovskite Thin Films for Enhanced and Directional Light Emission

Author

Muscarella, Loreta A., primary, Cordaro, Andrea, additional, Krause, Georg, additional, Pal, Debapriya, additional, Grimaldi, Gianluca, additional, Antony, Leo Sahaya Daphne, additional, Langhorst, David, additional, Callies, Adrian, additional, Bläsi, Benedikt, additional, Höhn, Oliver, additional, Koenderink, A. Femius, additional, Polman, Albert, additional, and Ehrler, Bruno, additional

Published
2022
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12. Nanopatterning of Perovskite Thin Films for Enhanced and Directional Light Emission

Author

Muscarella, Loreta A., Cordaro, Andrea, Krause, Georg, Pal, Debapriya, Grimaldi, Gianluca, Antony, Leo Sahaya Daphne, Langhorst, David, Callies, Adrian, Bläsi, Benedikt, Höhn, Oliver, Koenderink, A. Femius, Polman, Albert, and Publica

Subjects
waveguiding modes, nanopattern, light outcoupling, halide perovskite, nanoimprint, light emitting diodes, directional emission
Abstract

Lead-halide perovskites offer excellent properties for lighting and display applications. Nanopatterning perovskite films could enable perovskite-based devices with designer properties, increasing their performance and adding novel functionalities. We demonstrate the potential of nanopatterning for achieving light emission of a perovskite film into a specific angular range by introducing periodic sol–gel structures between the injection and emissive layer by using substrate conformal imprint lithography (SCIL). Structural and optical characterization reveals that the emission is funnelled into a well-defined angular range by optical resonances, while the emission wavelength and the structural properties of the perovskite film are preserved. The results demonstrate a flexible and scalable approach to the patterning of perovskite layers, paving the way toward perovskite LEDs with designer angular emission patterns.

Published
2022

13. Stable and precise optical bench for space applications

Author

Drougkakis, Ioannis, primary, Tzardis, Vaggelis, additional, Pal, Debapriya, additional, Pareek, Vinay, additional, Vasilakas, Georgios, additional, Papadakis, Nikolaos, additional, Papazoglou, Dimitrios G., additional, and von Klitzing, Wolf, additional

Published
2021
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17. Spontaneous symmetry breaking in plasmon lattice lasers.

Author

Fortman, Nelson de Gaay, Kolkowski, Radoslaw, Pal, Debapriya, Rodriguez, Said R. K., Schall, Peter, and Koenderink, A. Femius

Subjects
*SYMMETRY breaking, *ACTIVE medium, *FEMTOSECOND pulses, *FEMTOSECOND lasers, *MOMENTUM space, *LASERS
Abstract

Spontaneous symmetry breaking (SSB) is key for our understanding of phase transitions and the spontaneous emergence of order. In this work, we report that, for a two-dimensional (2D) periodic metasurface with gain, SSB occurs in the lasing transition. We study diffractive hexagonal plasmon nanoparticle lattices, where the K-points in momentum space provide two modes that are degenerate in frequency and identically distributed in space. Using femtosecond pulses to energize the gain medium, we simultaneously capture single-shot real-space and Fourier-space images of laser emission. By combining Fourier and real space, we resolve the two order parameters for which symmetry breaking simultaneously occurs: spatial parity and U(1) (rotational) symmetry breaking, evident respectively as random relative mode amplitude and phase. The methodology reported in this work is generally applicable to 2D plasmonic and dielectric metasurfaces and opens numerous opportunities for the study of SSB and the emergence of spatial coherence in metaphotonics. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Spontaneous symmetry breaking in plasmon lattice lasers.

Author

de Gaay Fortman N, Kolkowski R, Pal D, Rodriguez SRK, Schall P, and Koenderink AF

Abstract

Spontaneous symmetry breaking (SSB) is key for our understanding of phase transitions and the spontaneous emergence of order. In this work, we report that, for a two-dimensional (2D) periodic metasurface with gain, SSB occurs in the lasing transition. We study diffractive hexagonal plasmon nanoparticle lattices, where the K -points in momentum space provide two modes that are degenerate in frequency and identically distributed in space. Using femtosecond pulses to energize the gain medium, we simultaneously capture single-shot real-space and Fourier-space images of laser emission. By combining Fourier and real space, we resolve the two order parameters for which symmetry breaking simultaneously occurs: spatial parity and U (1) (rotational) symmetry breaking, evident respectively as random relative mode amplitude and phase. The methodology reported in this work is generally applicable to 2D plasmonic and dielectric metasurfaces and opens numerous opportunities for the study of SSB and the emergence of spatial coherence in metaphotonics.

Published
2024
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21. Temporal Dynamics of Collective Resonances in Periodic Metasurfaces.

Author

Kolkowski R, Berkhout A, Roscam Abbing SDC, Pal D, Dieleman CD, Geuchies JJ, Houtepen AJ, Ehrler B, and Koenderink AF

Abstract

Temporal dynamics of confined optical fields can provide valuable insights into light-matter interactions in complex optical systems, going beyond their frequency-domain description. Here, we present a new experimental approach based on interferometric autocorrelation (IAC) that reveals the dynamics of optical near-fields enhanced by collective resonances in periodic metasurfaces. We focus on probing the resonances known as waveguide-plasmon polaritons, which are supported by plasmonic nanoparticle arrays coupled to a slab waveguide. To probe the resonant near-field enhancement, our IAC measurements make use of enhanced two-photon excited luminescence (TPEL) from semiconductor quantum dots deposited on the nanoparticle arrays. Thanks to the incoherent character of TPEL, the measurements are only sensitive to the fundamental optical fields and therefore can reveal clear signatures of their coherent temporal dynamics. In particular, we show that the excitation of a high- Q collective resonance gives rise to interference fringes at time delays as large as 500 fs, much greater than the incident pulse duration (150 fs). Based on these signatures, the basic characteristics of the resonances can be determined, including their Q factors, which are found to exceed 200. Furthermore, the measurements also reveal temporal beating between two different resonances, providing information on their frequencies and their relative contribution to the field enhancement. Finally, we present an approach to enhance the visibility of the resonances hidden in the IAC curves by converting them into spectrograms, which greatly facilitates the analysis and interpretation of the results. Our findings open up new perspectives on time-resolved studies of collective resonances in metasurfaces and other multiresonant systems., Competing Interests: The authors declare no competing financial interest., (© 2024 The Authors. Published by American Chemical Society.)

Published
2024
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