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14 results on '"Molezuelas-Ferreras, Martín"'

1. Bandwidth control of the biphoton wavefunction exploiting spatio-temporal correlations

Author

Varga, J. J. Miguel, Lasa-Alonso, Jon, Molezuelas-Ferreras, Martín, Tischler, Nora, and Molina-Terriza, Gabriel

Subjects
Quantum Physics, Physics - Optics
Abstract

In this work we study the spatio-temporal correlations of photons produced by spontaneous parametric down conversion. In particular, we study how the waists of the detection and pump beams impact on the spectral bandwidth of the photons. Our results indicate that this parameter is greatly affected by the spatial properties of the detection beam, while not as much by the pump beam. This allows for a simple experimental implementation to control the bandwidth of the biphoton spectra, which only entails modifying the optical configuration to collect the photons. Moreover, we have performed Hong-Ou-Mandel interferometry measurements that also provide the phase of the biphoton wavefunction, and thereby its temporal shape. We explain all these results with a toy model derived under certain approximations, which accurately recovers most of the interesting experimental details., Comment: 10 pages, 4 figures

Published
2021
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3. Characterizing the Backscattered Spectrum of Mie Spheres

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Ministerio de Ciencia e Innovación (España), Eusko Jaurlaritza, Universidad del País Vasco, Consejo Superior de Investigaciones Científicas (España), CSIC - Plataforma Temática Interdisciplinar del CSIC Es Ciencia (PTI Es Ciencia), Ministerio de Economía y Competitividad (España), Molezuelas-Ferreras, Martín, Nodar, Álvaro, Barra-Burillo, María, Olmos-Trigo, Jorge, Lasa-Alonso, Jon, Gómez-Viloria, Iker, Posada, Elena, Varga, J.J.M., Esteban, Ruben, Aizpurua, Javier, Hueso, Luis E., López, Cefe, Molina-Terriza, Gabriel, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Ministerio de Ciencia e Innovación (España), Eusko Jaurlaritza, Universidad del País Vasco, Consejo Superior de Investigaciones Científicas (España), CSIC - Plataforma Temática Interdisciplinar del CSIC Es Ciencia (PTI Es Ciencia), Ministerio de Economía y Competitividad (España), Molezuelas-Ferreras, Martín, Nodar, Álvaro, Barra-Burillo, María, Olmos-Trigo, Jorge, Lasa-Alonso, Jon, Gómez-Viloria, Iker, Posada, Elena, Varga, J.J.M., Esteban, Ruben, Aizpurua, Javier, Hueso, Luis E., López, Cefe, and Molina-Terriza, Gabriel

Abstract

This study describes both experimentally and theoretically an important hitherto undiscovered feature of the scattering of micron-sized spherical objects when illuminated with highly focused circularly polarized light. This is a regime of high experimental relevance which has not been described in full detail. The experiments are complemented with the analytical formulas explaining the field scattered directed toward the backward hemispace. In particular, it is proven that this field shows a very regular oscillatory dependency with the optical size. This phenomenon is typically hidden in the total scattered field, as the field is scattered much less toward the backward hemisphere than toward the forward one. These regular oscillations are measured experimentally. It is proven that, by analyzing them, it is possible to determine the index of refraction of isolated micron-sized particles, opening new paths for applications in sensing and metrology.

Published
2024

6. Research data supporting 'Characterizing the Backscattered Spectrum of Mie Spheres'

Author

Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), European Commission, Eusko Jaurlaritza, Consejo Superior de Investigaciones Científicas (España), Molezuelas-Ferreras, Martín [0000-0002-1133-903X], Lasa-Alonso, Jon [0000-0001-8487-3789], Aizpurua, Javier [0000-0002-1444-7589], López, Cefe [0000-0001-5635-4463], Molina-Terriza, Gabriel [0000-0002-7905-4938], Molezuelas-Ferreras, Martín, Nodar, Álvaro, Barra-Burillo, María, Olmos-Trigo, Jorge, Lasa-Alonso, Jon, Gómez-Viloria, Iker, Posada, Elena, Varga, J.J.M., Esteban, Ruben, Aizpurua, Javier, Hueso, Luis E., López, Cefe, Molina-Terriza, Gabriel, Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), European Commission, Eusko Jaurlaritza, Consejo Superior de Investigaciones Científicas (España), Molezuelas-Ferreras, Martín [0000-0002-1133-903X], Lasa-Alonso, Jon [0000-0001-8487-3789], Aizpurua, Javier [0000-0002-1444-7589], López, Cefe [0000-0001-5635-4463], Molina-Terriza, Gabriel [0000-0002-7905-4938], Molezuelas-Ferreras, Martín, Nodar, Álvaro, Barra-Burillo, María, Olmos-Trigo, Jorge, Lasa-Alonso, Jon, Gómez-Viloria, Iker, Posada, Elena, Varga, J.J.M., Esteban, Ruben, Aizpurua, Javier, Hueso, Luis E., López, Cefe, and Molina-Terriza, Gabriel

Abstract

The file contains the dataset corresponding to the figures of the article "Characterizing the Backscattered Spectrum of Mie Spheres" written by Martín Molezuelas-Ferreras, Álvaro Nodar, María Barra-Burillo, Jorge Olmos-Trigo, Jon Lasa-Alonso, Iker Gómez-Viloria, Elena Posada, J. J. Miguel Varga, Rubén Esteban, Javier Aizpurua, Luis E. Hueso, Cefe Lopez, and Gabriel Molina-Terriza (DOI: 10.1002/lpor.202300665). The data is organized into different folders, and each folder contains .txt files of the data for each of the figures indicated on its name, together with README instructions on each case.

Published
2023

7. Characterizing the Backscattered Spectrum of Mie Spheres.

Author

Molezuelas‐Ferreras, Martín, Nodar, Álvaro, Barra‐Burillo, María, Olmos‐Trigo, Jorge, Lasa‐Alonso, Jon, Gómez‐Viloria, Iker, Posada, Elena, Varga, J. J. Miguel, Esteban, Rubén, Aizpurua, Javier, Hueso, Luis E., Lopez, Cefe, and Molina‐Terriza, Gabriel

Subjects
*REFRACTIVE index, *MIE scattering, *METROLOGY, *ANGULAR momentum (Mechanics), *OSCILLATIONS
Abstract

This study describes both experimentally and theoretically an important hitherto undiscovered feature of the scattering of micron‐sized spherical objects when illuminated with highly focused circularly polarized light. This is a regime of high experimental relevance which has not been described in full detail. The experiments are complemented with the analytical formulas explaining the field scattered directed toward the backward hemispace. In particular, it is proven that this field shows a very regular oscillatory dependency with the optical size. This phenomenon is typically hidden in the total scattered field, as the field is scattered much less toward the backward hemisphere than toward the forward one. These regular oscillations are measured experimentally. It is proven that, by analyzing them, it is possible to determine the index of refraction of isolated micron‐sized particles, opening new paths for applications in sensing and metrology. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
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9. Bandwidth control of the biphoton wavefunction exploiting spatio-temporal correlations

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Educación, Cultura y Deporte (España), Australian Research Council, Alexander von Humboldt Foundation, Varga, J.J.M., Lasa-Alonso, Jon, Molezuelas-Ferreras, Martín, Tischler, Nora, Molina-Terriza, Gabriel, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Educación, Cultura y Deporte (España), Australian Research Council, Alexander von Humboldt Foundation, Varga, J.J.M., Lasa-Alonso, Jon, Molezuelas-Ferreras, Martín, Tischler, Nora, and Molina-Terriza, Gabriel

Abstract

In this work we study the spatio-temporal correlations of photons produced by spontaneous parametric down conversion. In particular, we study how the waists of the detection and pump beams impact on the spectral bandwidth of the photons. Our results indicate that this parameter is greatly affected by the spatial properties of the detection beam, while not as much by the pump beam. This allows for a simple experimental implementation to control the bandwidth of the biphoton spectra, which only entails modifying the optical configuration to collect the photons. Moreover, we have performed Hong–Ou–Mandel interferometry measurements that also provide the phase of the biphoton wavefunction, and thereby its temporal shape. We explain all these results with a toy model derived under certain approximations, which accurately recovers most of the interesting experimental details.

Published
2022

10. Using the electromagnetic helicity to characterize nanoparticles

Author

Ministerio de Ciencia, Innovación y Universidades (España), Eusko Jaurlaritza, Universidad del País Vasco, Agencia Estatal de Investigación (España), Nodar, Álvaro, Molezuelas-Ferreras, Martín, Esteban, Ruben, Aizpurua, Javier, Molina-Terriza, Gabriel, Ministerio de Ciencia, Innovación y Universidades (España), Eusko Jaurlaritza, Universidad del País Vasco, Agencia Estatal de Investigación (España), Nodar, Álvaro, Molezuelas-Ferreras, Martín, Esteban, Ruben, Aizpurua, Javier, and Molina-Terriza, Gabriel

Published
2021

11. Multiple Kerker anapoles in dielectric microspheres

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Eusko Jaurlaritza, Sanz-Fernández, Cristina, Molezuelas-Ferreras, Martín, Lasa-Alonso, Jon, Sousa, Nuno de, Zambrana-Puyalto, Xavier, Olmos-Trigo, Jorge, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Eusko Jaurlaritza, Sanz-Fernández, Cristina, Molezuelas-Ferreras, Martín, Lasa-Alonso, Jon, Sousa, Nuno de, Zambrana-Puyalto, Xavier, and Olmos-Trigo, Jorge

Abstract

High refractive index dielectric spheres present remarkable light-scattering properties in the spectral range dominated by dipolar modes. However, most of these properties are absent for larger spheres under plane wave illumination. Here, a proposal to unravel these dipolar regimes for larger particles under the illumination of a pure dipolar field is presented. This type of illumination ensures that the scattering response of the sphere is purely dipolar. In this scenario, it is shown that Kerker conditions are not only related to duality symmetry and a strong backward-to-forward asymmetric light-scattering, but also to the appearance of non-radiating sources: the so-called hybrid anapoles. Finally, it is shown that all the above-mentioned scattering features under dipolar illumination are reproducible with an experimentally accessible tightly-focused Gaussian beam.

Published
2021

13. Symmetry-protection of multiphoton states of light

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Educación, Cultura y Deporte (España), Diputación Foral de Gipuzkoa, Lasa-Alonso, Jon, Molezuelas-Ferreras, Martín, Varga, J.J.M., García-Etxarri, Aitzol, Giedke, Géza, Molina-Terriza, Gabriel, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Educación, Cultura y Deporte (España), Diputación Foral de Gipuzkoa, Lasa-Alonso, Jon, Molezuelas-Ferreras, Martín, Varga, J.J.M., García-Etxarri, Aitzol, Giedke, Géza, and Molina-Terriza, Gabriel

Abstract

In this manuscript we analyze the emergence of protected multiphoton states in scattering problems with cylindrical symmetry. In order to do that, we first provide a formal definition of the concept of postselected symmetry-protection. We show that the notion of symmetry-protection is not limited to one- or two-photon states, on the contrary, it can be formally extended to the multiphoton case. In addition, we prove for the case of cylindrical symmetry that all possible multiphoton protected states are constructed from a small set of one- and two-photon states. Finally, we point out possible applications that symmetry-protected states may have in quantum communications, concretely, in the construction of decoherence-free subspaces.

Published
2020

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