| Autor: |
Nishida Kentaro, Sasai Koki, Xu Rongyang, Yen Te-Hsin, Tang Yu-Lung, Takahara Junichi, Chu Shi-Wei |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Nanophotonics, Vol 12, Iss 1, Pp 139-146 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2192-8614 |
| DOI: |
10.1515/nanoph-2022-0597 |
| Popis: |
In this paper, we theoretically and experimentally demonstrated photothermal nonlinearities of both forward and backward scattering intensities from quasi-perfect absorbing silicon-based metasurface with only λ/7 thickness. The metasurface is efficiently heated up by photothermal effect under laser irradiation, which in turn modulates the scattering spectra via thermo-optical effect. Under a few milliwatt continuous-wave excitation at the resonance wavelength of the metasurface, backward scattering cross-section doubles, and forward scattering cross-section reduces to half. Our study opens up the all-optical dynamical control of the scattering directionality, which would be applicable to silicon photonic devices. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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