Design of quasi-one-dimensional phononic crystal cavity for efficient photoelastic modulation

• Ingi Kim

• Satoshi Iwamoto

• Yasuhiko Arakawa

抄録

We propose and design a phononic crystal (PnC) cavity for efficient photoelastic modulation. A strongly confined acoustic field in the cavity enhances light-sound interaction, which results in efficient phase modulation of light. As one of the possible configurations, an acoustic cavity formed in a quasi-one-dimensional (quasi-1D) PnC was investigated. By carefully tuning geometrical parameters, we successfully designed a high- Q cavity mode for a longitudinal wave within a complete phononic band gap. The acoustic Q was calculated to be as high as 9.5 × 10 4 . This enables efficient optical modulation by a factor of 2.5 compared with a bar-type structure without PnCs.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 55 (8S3), 08RD02-, 2016-07-15

  IOP Publishing

キーワード

• General Physics and Astronomy
• General Engineering

詳細情報

• CRID: 1360847874820865792
• NII論文ID: 210000147028
• DOI: 10.7567/jjap.55.08rd02
• ISSN: 13474065
• ISSN: 00214922
• Web Site: http://stacks.iop.org/1347-4065/55/i=8S3/a=08RD02/pdf
• Web Site: http://stacks.iop.org/1347-4065/55/i=8S3/a=08RD02?key=crossref.d20d8d9df03ac1d02adc2d999f6a9644
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.08RD02
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.08RD02/pdf
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