Nano-electromechanical Tuning of Dual-Mode Resonant Dielectric Metasurfaces for Dynamic Amplitude and Phase Modulation
| Autor: | Andrei Faraon, Hyounghan Kwon, Tianzhe Zheng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Guided-mode resonance business.industry Mechanical Engineering Physics::Optics Bioengineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Interference (wave propagation) Article Optical modulator Modulation Phase response Optoelectronics General Materials Science 0210 nano-technology business Intensity modulation Phase modulation Photonic crystal |
| Zdroj: | Nano Lett |
| ISSN: | 1530-6992 |
| Popis: | Planar all-dielectric photonic crystals or metasurfaces host various resonant eigenmodes including leaky guided mode resonance (GMR) and bound states in the continuum (BIC). Engineering these resonant modes can provide new opportunities for diverse applications. Particularly, electrical control of the resonances will boost development of the applications by making them tunable. Here, we experimentally demonstrate nanoelectromechanical tuning of both the GMR and the quasi-BIC modes in the telecom wavelength range. With electrostatic forces induced by a few voltages, the devices achieve spectral shifts over 5 nm, absolute intensity modulation over 40%, and modulation speed exceeding 10 kHz. We also show that the interference between two resonances enables the enhancement of the phase response when two modes are overlapped in spectrum. A phase shift of 144° is experimentally observed with a bias of 4V. Our work suggests a direct route towards optical modulators through the engineering of GMRs and quasi-BIC resonances. |
| Databáze: | OpenAIRE |
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