Hybrid confinement of optical and mechanical modes in a bullseye optomechanical resonator

Autor(es)

Santos, Felipe G. S. ; Espinel, Yovanny A. V. ; Luiz, Gustavo O. ; Benevides, Rodrigo S. ; Wiederhecker, Gustavo S. ; Mayer Alegre, Thiago P.

• Tipo de documento: Artigo Científico
• Fonte: Optics Express; v. 25, n. 2, p. 508-529, JAN 23 2017.
• Citações Web of Science: 4

Resumo

Optomechanical cavities have proven to be an exceptional tool to explore fundamental and applied aspects of the interaction between mechanical and optical waves. Here we demonstrate a novel optomechanical cavity based on a disk with a radial mechanical bandgap. This design confines light and mechanical waves through distinct physical mechanisms which allows for independent control of the mechanical and optical properties. Simulations foresee an optomechanical coupling rate g(0) reaching 2 pi x 100 kHz for mechanical frequencies around 5 GHz as well as anchor loss suppression of 60 dB. Our device design is not limited by unique material properties and could be easily adapted to allow for large optomechanical coupling and high mechanical quality factors with other promising materials. Finally, our devices were fabricated in a commercial silicon photonics facility, demonstrating g(0)/2 pi = 23 kHz for mechanical modes with frequencies around 2 GHz and mechanical Q-factors as high as 2300 at room temperature, also showing that our approach can be easily scalable and useful as a new platform for multimode optomechanics. (C) 2017 Optical Society of America (AU)

• Processo FAPESP: 13/06360-9 - Estudo de cavidades optomecânicas
• Beneficiário: Felipe Gustavo da Silva Santos
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/17610-3 - Optomecânica em cristais fotônicos e fonônicos
• Beneficiário: Thiago Pedro Mayer Alegre
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
• Processo FAPESP: 12/17765-7 - Nanofotônica em semicondutores do Grupo IV e III-V
• Beneficiário: Gustavo Silva Wiederhecker
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores