| Autor: |
Espinel YA; Gleb Wataghin Physics Institute, University of Campinas, 13083-859 Campinas, SP, Brazil., Santos FG; Gleb Wataghin Physics Institute, University of Campinas, 13083-859 Campinas, SP, Brazil., Luiz GO; Gleb Wataghin Physics Institute, University of Campinas, 13083-859 Campinas, SP, Brazil., Alegre TP; Gleb Wataghin Physics Institute, University of Campinas, 13083-859 Campinas, SP, Brazil., Wiederhecker GS; Gleb Wataghin Physics Institute, University of Campinas, 13083-859 Campinas, SP, Brazil. |
| Abstrakt: |
The simultaneous control of optical and mechanical waves has enabled a range of fundamental and technological breakthroughs, from the demonstration of ultra-stable frequency reference devices, to the exploration of the quantum-classical boundaries in optomechanical laser-cooling experiments. More recently, such an optomechanical interaction has been observed in integrated nano-waveguides and microcavities in the Brillouin regime, where short-wavelength mechanical modes scatter light at several GHz. Here we engineer coupled optical microcavities to enable a low threshold excitation of mechanical travelling-wave modes through backward stimulated Brillouin scattering. Exploring the backward scattering we propose silicon microcavity designs based on laterally coupled single and double-layer cavities, the proposed structures enable optomechanical coupling with very high frequency modes (11 to 25 GHz) and large optomechanical coupling rates (g 0 /2π) from 50 kHz to 90 kHz. |
