Abstract
We investigate the acousto-optic coupling rates between different acoustic resonance modes and a specified optical resonance mode in a one-dimensional phoxonic crystal fishbone nanobeam formed by periodically arranging semi-cylinders of air on both sides of a suspended silicon waveguide. The gradually tapered unit cells form optical and acoustic resonators. In acousto-optic coupling rate calculation, the acoustic fields and optical fields are obtained by steady state monochromatic analysis and eigen-mode computation, respectively. Results showed that the acoustic polarizations and symmetries of the acoustic resonance modes are dominant factors in the acousto-optic coupling efficiency, and appropriate selection of these parameters can prevent cancellation of acousto-optic interactions, thereby enhancing acousto-optic coupling rates. This study provides important insights that can be applied to acousto-optic device designs.
Original language | English |
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Pages (from-to) | 6076-6091 |
Number of pages | 16 |
Journal | Optics Express |
Volume | 25 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2017 Mar 20 |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics