Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model
The promise of dynamic nanophotonic technologies relies on the confinement and spatiotemporal control of light at the nanoscale. Confinement via plasmonics, dielectric resonators, and waveguides can be complemented with materials whose optical properties can be controlled using nonlinear effects. Tr...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-03-01
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| Series: | Advanced Photonics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/adpr.202200280 |
| _version_ | 1811160830925864960 |
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| author | Joshua Baxter Adriana Pérez-Casanova Luis Cortes-Herrera Antonio Calà Lesina Israel De Leon Lora Ramunno |
| author_facet | Joshua Baxter Adriana Pérez-Casanova Luis Cortes-Herrera Antonio Calà Lesina Israel De Leon Lora Ramunno |
| author_sort | Joshua Baxter |
| collection | DOAJ |
| description | The promise of dynamic nanophotonic technologies relies on the confinement and spatiotemporal control of light at the nanoscale. Confinement via plasmonics, dielectric resonators, and waveguides can be complemented with materials whose optical properties can be controlled using nonlinear effects. Transparent conducting oxides (TCOs) exhibit strong optical nonlinearities in their near‐zero permittivity spectral region, on the femtosecond timescale. Harnessing full spatiotemporal control over the nonlinear response requires a deeper understanding of the process. To achieve this, a self‐consistent multiphysics time‐domain model for the nonlinear optical response of TCOs is developed and implemented into a 3D finite‐difference time‐domain code. Simulations are compared and tuned against recently published experimental results for intense laser irradiation of thin indium tin oxide (ITO) films, achieving good quantitative agreement; the time‐domain dynamics of the nonlinear response and the phenomenon of time‐refraction are also explored. Finally, by simulating intense laser irradiation of a plasmonic particle on an ITO film, the applicability of the approach to time‐varying metasurfaces is demonstrated. As expected, significant enhancement of the nonlinear response of an ITO‐based metasurface over bare ITO thin films is found. This work thus enables quantitative nanophotonics design with conductive oxides in their epsilon‐near‐zero region. |
| first_indexed | 2024-04-10T06:04:13Z |
| format | Article |
| id | doaj.art-bcaf5cf65b8b45ef80b4c5fa124e9f24 |
| institution | Directory Open Access Journal |
| issn | 2699-9293 |
| language | English |
| last_indexed | 2024-04-10T06:04:13Z |
| publishDate | 2023-03-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Photonics Research |
| spelling | doaj.art-bcaf5cf65b8b45ef80b4c5fa124e9f242023-03-03T05:17:27ZengWiley-VCHAdvanced Photonics Research2699-92932023-03-0143n/an/a10.1002/adpr.202200280Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational ModelJoshua Baxter0Adriana Pérez-Casanova1Luis Cortes-Herrera2Antonio Calà Lesina3Israel De Leon4Lora Ramunno5Department of Physics and Centre for Research in Photonics University of Ottawa Ottawa K1N 6N5 CanadaSchool of Engineering and Sciences Tecnologico de Monterrey Monterrey NL 64849 MexicoSchool of Engineering and Sciences Tecnologico de Monterrey Monterrey NL 64849 MexicoHannover Centre for Optical Technologies Cluster of Excellence PhoenixD, and Faculty of Mechanical Engineering (Institute for Transport and Automation Technology) Leibniz University Hannover Hannover 30167 GermanySchool of Engineering and Sciences Tecnologico de Monterrey Monterrey NL 64849 MexicoDepartment of Physics and Centre for Research in Photonics University of Ottawa Ottawa K1N 6N5 CanadaThe promise of dynamic nanophotonic technologies relies on the confinement and spatiotemporal control of light at the nanoscale. Confinement via plasmonics, dielectric resonators, and waveguides can be complemented with materials whose optical properties can be controlled using nonlinear effects. Transparent conducting oxides (TCOs) exhibit strong optical nonlinearities in their near‐zero permittivity spectral region, on the femtosecond timescale. Harnessing full spatiotemporal control over the nonlinear response requires a deeper understanding of the process. To achieve this, a self‐consistent multiphysics time‐domain model for the nonlinear optical response of TCOs is developed and implemented into a 3D finite‐difference time‐domain code. Simulations are compared and tuned against recently published experimental results for intense laser irradiation of thin indium tin oxide (ITO) films, achieving good quantitative agreement; the time‐domain dynamics of the nonlinear response and the phenomenon of time‐refraction are also explored. Finally, by simulating intense laser irradiation of a plasmonic particle on an ITO film, the applicability of the approach to time‐varying metasurfaces is demonstrated. As expected, significant enhancement of the nonlinear response of an ITO‐based metasurface over bare ITO thin films is found. This work thus enables quantitative nanophotonics design with conductive oxides in their epsilon‐near‐zero region.https://doi.org/10.1002/adpr.202200280active nanophotonicsdynamic nanophotonicsepsilon near zerofinite-difference time-domaintransparent conductive oxides |
| spellingShingle | Joshua Baxter Adriana Pérez-Casanova Luis Cortes-Herrera Antonio Calà Lesina Israel De Leon Lora Ramunno Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model Advanced Photonics Research active nanophotonics dynamic nanophotonics epsilon near zero finite-difference time-domain transparent conductive oxides |
| title | Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model |
| title_full | Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model |
| title_fullStr | Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model |
| title_full_unstemmed | Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model |
| title_short | Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model |
| title_sort | dynamic nanophotonics in epsilon near zero conductive oxide films and metasurfaces a quantitative nonlinear computational model |
| topic | active nanophotonics dynamic nanophotonics epsilon near zero finite-difference time-domain transparent conductive oxides |
| url | https://doi.org/10.1002/adpr.202200280 |
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