Spectrally Broadband Electro-Optic Modulation with Nanoelectromechanical String Resonators
| Autor: | Nicolas Cazier, Pedram Sadeghi, Mostafa M. Shawrav, Silvan Schmid, Miao-Hsuan Chien |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
business.industry FOS: Physical sciences 02 engineering and technology Physics - Applied Physics Applied Physics (physics.app-ph) 021001 nanoscience & nanotechnology 01 natural sciences Electromagnetic radiation String (physics) Atomic and Molecular Physics and Optics 010309 optics Amplitude modulation Resonator Optics Modulation Shutter 0103 physical sciences String resonance 0210 nano-technology business Refractive index Physics - Optics Optics (physics.optics) |
| Zdroj: | Optics Express |
| DOI: | 10.48550/arxiv.1912.09517 |
| Popis: | In this paper, we present a shutter-based electro-optical modulator made of two parallel nanoelectromechanical silicon nitride string resonators. These strings are covered with electrically connected gold electrodes and actuated either by Lorentz or electrostatic forces. The in-plane string vibrations modulate the width of the gap between the strings. The gold electrodes on both sides of the gap act as a mobile mirror that modulate the laser light that is focused in the middle of this gap. These electro-optical modulators can achieve an optical modulation depth of almost 100% for a driving voltage lower than 1 mV at a frequency of 314 kHz. The frequency range is determined by the string resonance frequency, which can take values of the order of a few hundred kilohertz to several megahertz. The strings are driven in the strongly nonlinear regime, which allows a frequency tuning of several kilohertz without significant effect on the optical modulation depth. |
| Databáze: | OpenAIRE |
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