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Your search keyword '"Ng, Ryan"' showing total 7 results
Start Over Author "Ng, Ryan" Publisher american physical society
7 results on '"Ng, Ryan"'

1. Intermodulation of optical frequency combs in a multimode optomechanical system

Author

European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Generalitat de Catalunya, Villum Fonden, Danish National Research Foundation, Innovation Fund Denmark, Independent Research Fund Denmark, Ng, Ryan C. [0000-0002-0527-9130], Navarro-Urrios, D. [0000-0001-9055-1583], Arregui, Guillermo [0000-0002-6458-5277], Albrechtsen, Marcus [0000-0003-4226-0997], García, Pedro David [0000-0002-3422-178X], Stobbe, Søren [0000-0002-0991-041X], Sotomayor Torres, C. M. [0000-0001-9986-2716], Madiot, Guilhem [0000-0003-2662-4324], Ng, Ryan C., Nizet, Paul, Navarro-Urrios, D., Arregui, Guillermo, Albrechtsen, Marcus, García, Pedro David, Stobbe, Søren, Sotomayor Torres, C. M., Madiot, Guilhem, European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Generalitat de Catalunya, Villum Fonden, Danish National Research Foundation, Innovation Fund Denmark, Independent Research Fund Denmark, Ng, Ryan C. [0000-0002-0527-9130], Navarro-Urrios, D. [0000-0001-9055-1583], Arregui, Guillermo [0000-0002-6458-5277], Albrechtsen, Marcus [0000-0003-4226-0997], García, Pedro David [0000-0002-3422-178X], Stobbe, Søren [0000-0002-0991-041X], Sotomayor Torres, C. M. [0000-0001-9986-2716], Madiot, Guilhem [0000-0003-2662-4324], Ng, Ryan C., Nizet, Paul, Navarro-Urrios, D., Arregui, Guillermo, Albrechtsen, Marcus, García, Pedro David, Stobbe, Søren, Sotomayor Torres, C. M., and Madiot, Guilhem

Abstract

Phonons offer the possibility to connect the microwave and optical domains while being efficiently transduced with electronic and optical signals. Here, we present a multimodal optomechanical platform, consisting of a mechanical-optical-mechanical resonator configuration. The mechanical modes, with frequencies at 265 MHz and 6.8 GHz, can be simultaneously excited into a phonon lasing regime as supported by a stability analysis of the system. Both the megahertz and gigahertz modes enter a self-sustained oscillation regime, leading to the intermodulation of two frequency combs in the optical field. We characterize this platform experimentally, demonstrating previously unexplored dynamical regimes. These results suggest the possibility to control multiple mechanical degrees of freedom via a single optical mode, with implications in gigahertz phononic devices, signal processing, and optical comb sensing applications.

Published
2023

2. Optomechanical Generation of Coherent GHz Vibrations in a Phononic Waveguide

Author

European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Villum Fonden, Danish National Research Foundation, Innovation Fund Denmark, Independent Research Fund Denmark, Madiot, Guilhem [0000-0003-2662-4324], Ng, Ryan C. [0000-0002-0527-9130], Arregui, Guillermo [0000-0002-6458-5277], Florez, Omar [0000-0001-6662-9811], Albrechtsen, Marcus [0000-0003-4226-0997], Sotomayor Torres, C. M. [0000-0001-9986-2716], Madiot, Guilhem, Ng, Ryan C., Arregui, Guillermo, Florez, Omar, Albrechtsen, Marcus, Stobbe, Søren, García, Pedro David, Sotomayor Torres, C. M., European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Villum Fonden, Danish National Research Foundation, Innovation Fund Denmark, Independent Research Fund Denmark, Madiot, Guilhem [0000-0003-2662-4324], Ng, Ryan C. [0000-0002-0527-9130], Arregui, Guillermo [0000-0002-6458-5277], Florez, Omar [0000-0001-6662-9811], Albrechtsen, Marcus [0000-0003-4226-0997], Sotomayor Torres, C. M. [0000-0001-9986-2716], Madiot, Guilhem, Ng, Ryan C., Arregui, Guillermo, Florez, Omar, Albrechtsen, Marcus, Stobbe, Søren, García, Pedro David, and Sotomayor Torres, C. M.

Abstract

Nanophononics has the potential for information transfer, in an analogous manner to its photonic and electronic counterparts. The adoption of phononic systems has been limited, due to difficulties associated with the generation, manipulation, and detection of phonons, especially at GHz frequencies. Existing techniques often require piezoelectric materials with an external radiofrequency excitation that are not readily integrated into existing CMOS infrastructures, while nonpiezoelectric demonstrations have been inefficient. In this Letter, we explore the optomechanical generation of coherent phonons in a suspended 2D silicon phononic crystal cavity with a guided mode around 6.8 GHz. By incorporating an air-slot into this cavity, we turn the phononic waveguide into an optomechanical platform that exploits localized photonic modes resulting from inherent fabrication imperfections for the transduction of mechanics. Such a platform exhibits very fine control of phonons using light, and is capable of coherent self-sustained phonon generation around 6.8 GHz, operating at room temperature. The ability to generate high frequency coherent mechanical vibrations within such a simple 2D CMOS-compatible system could be a first step towards the development of sources in phononic circuitry and the coherent manipulation of other solid-state properties.

Published
2023

4. Supplementary information for Cavity optomechanics with Anderson-localized optical modes

Author

Arregui, Guillermo, Ng, Ryan C., Albrechtsen, Marcus, Stobbe, Søren, Sotomayor Torres, C. M., García, Pedro David, Arregui, Guillermo, Ng, Ryan C., Albrechtsen, Marcus, Stobbe, Søren, Sotomayor Torres, C. M., and García, Pedro David

Abstract

Supplementary material with stadistical analysis of the localization length, the quality-factors, the mode volumes and the optomechanical coupling rates.

Published
2023

5. Quantum thermometry with single molecules in nanoprobes

Author

European Commission, European Research Council, Ministerio de Universidades (España), Universidad de Sevilla, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Generalitat de Catalunya, Ministerio de Ciencia e Innovación (España), Esteso, Victoria, Duquennoy, R., Ng, Ryan C., Colautti, M., Lombardi, P., Arregui, Guillermo, Chávez-Angel, Emigdio, Sotomayor Torres, C. M., García Fernández, Pedro David, Hilke, M., Toninelli, C., European Commission, European Research Council, Ministerio de Universidades (España), Universidad de Sevilla, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Generalitat de Catalunya, Ministerio de Ciencia e Innovación (España), Esteso, Victoria, Duquennoy, R., Ng, Ryan C., Colautti, M., Lombardi, P., Arregui, Guillermo, Chávez-Angel, Emigdio, Sotomayor Torres, C. M., García Fernández, Pedro David, Hilke, M., and Toninelli, C.

Abstract

An understanding of heat transport is relevant to developing efficient strategies for thermal management in areas of study such as microelectronics, as well as for fundamental science purposes. However, the measurement of temperatures in nanostructured environments and in cryogenic conditions remains a challenging task, requiring both high sensitivity and noninvasive approaches. Here, we present a portable nanothermometer based on a molecular two-level quantum system that operates in the (3–20)-K temperature range, with temperatures and spatial resolutions on the order of millikelvins and micrometers, respectively. We validate the performance of this molecular thermometer by estimating the thermal conductivity of a nanopatterned silicon membrane, where we find a quadratic temperature dependence. In addition, we demonstrate two-dimensional temperature mapping via the simultaneous spectroscopy of multiple probes deposited onto such a suspended membrane. Overall, these results demonstrate the unique potential of the proposed molecular thermometer to explore thermal properties with submicron accuracy and unveil related phenomena manifested at cryogenic temperatures.

Published
2023

7. Optomechanical Generation of Coherent GHz Vibrations in a Phononic Waveguide.

Author

Madiot G, Ng RC, Arregui G, Florez O, Albrechtsen M, Stobbe S, García PD, and Sotomayor-Torres CM

Abstract

Nanophononics has the potential for information transfer, in an analogous manner to its photonic and electronic counterparts. The adoption of phononic systems has been limited, due to difficulties associated with the generation, manipulation, and detection of phonons, especially at GHz frequencies. Existing techniques often require piezoelectric materials with an external radiofrequency excitation that are not readily integrated into existing CMOS infrastructures, while nonpiezoelectric demonstrations have been inefficient. In this Letter, we explore the optomechanical generation of coherent phonons in a suspended 2D silicon phononic crystal cavity with a guided mode around 6.8 GHz. By incorporating an air-slot into this cavity, we turn the phononic waveguide into an optomechanical platform that exploits localized photonic modes resulting from inherent fabrication imperfections for the transduction of mechanics. Such a platform exhibits very fine control of phonons using light, and is capable of coherent self-sustained phonon generation around 6.8 GHz, operating at room temperature. The ability to generate high frequency coherent mechanical vibrations within such a simple 2D CMOS-compatible system could be a first step towards the development of sources in phononic circuitry and the coherent manipulation of other solid-state properties.

Published
2023
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