Understanding the nonlinear optical response of epsilon near zero materials in the time-domain
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2021
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866929635524083712 |
|---|---|
| author | Baxter, Joshua Pérez-Casanova, Adriana Cortes-Herrera, Luis Lesina, Antonio Calà De Leon, Israel Ramunno, Lora |
| author_facet | Baxter, Joshua Pérez-Casanova, Adriana Cortes-Herrera, Luis Lesina, Antonio Calà De Leon, Israel Ramunno, Lora |
| contents | The promise of active nanophotonics technology relies on the confinement and 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 time-scale. Harnessing full control over the nonlinear response requires a deeper understanding of the process. To achieve this, we develop a self-consistent time-domain model for the nonlinear optical response of TCOs and implement it into a three-dimensional finite-difference time-domain code. We compare and tune our simulation tools against recently published experimental results for intense laser irradiation of thin indium tin oxide (ITO) films. Finally, by simulating intense laser irradiation of ITO-based plasmonic metasurfaces, we demonstrate the full power of our approach. As expected, we find validating the significant enhancement of the nonlinear response of an ITO-based metasurface over bare ITO thin films. Our work thus enables quantitative nanophotonics design with epsilon-near-zero materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2110_14806 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Understanding the nonlinear optical response of epsilon near zero materials in the time-domain Baxter, Joshua Pérez-Casanova, Adriana Cortes-Herrera, Luis Lesina, Antonio Calà De Leon, Israel Ramunno, Lora Optics Computational Physics The promise of active nanophotonics technology relies on the confinement and 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 time-scale. Harnessing full control over the nonlinear response requires a deeper understanding of the process. To achieve this, we develop a self-consistent time-domain model for the nonlinear optical response of TCOs and implement it into a three-dimensional finite-difference time-domain code. We compare and tune our simulation tools against recently published experimental results for intense laser irradiation of thin indium tin oxide (ITO) films. Finally, by simulating intense laser irradiation of ITO-based plasmonic metasurfaces, we demonstrate the full power of our approach. As expected, we find validating the significant enhancement of the nonlinear response of an ITO-based metasurface over bare ITO thin films. Our work thus enables quantitative nanophotonics design with epsilon-near-zero materials. |
| title | Understanding the nonlinear optical response of epsilon near zero materials in the time-domain |
| topic | Optics Computational Physics |
| url | https://arxiv.org/abs/2110.14806 |