High-efficiency acousto-optical interaction in phoxonic nanobeam waveguide

Fu Li Hsiao; Cheng Yi Hsieh; Hao Yu Hsieh; Chien Chang Chiu

doi:10.1063/1.4705295

High-efficiency acousto-optical interaction in phoxonic nanobeam waveguide

Fu Li Hsiao, Cheng Yi Hsieh, Hao Yu Hsieh, Chien Chang Chiu

Graduate Institute of Photonics

Research output: Contribution to journal › Article

24 Citations (Scopus)

Abstract

We demonstrate the simultaneous existence of slow photonic and phononic modes in phoxonic nanobeam. The phoxonic nanobeam is formed by arranging air semi-cylinders along lateral sides of a suspended silicon waveguide. Because of the slow group velocities, the acousto-optical interactions are dramatically enhanced. The efficiencies of interaction are strongly related to the polarizations of both slow photonic and phononic modes. Our proposed structure is a potential high-efficiency acousto-optical modulator with ultra-small footprint size. The operating optical wavelength is about 1550 nm, while the acoustic frequency is about 6.8 GHz.

Original language	English
Article number	171103
Journal	Applied Physics Letters
Volume	100
Issue number	17
DOIs	https://doi.org/10.1063/1.4705295
Publication status	Published - 2012 Apr 23

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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Hsiao, F. L., Hsieh, C. Y., Hsieh, H. Y., & Chiu, C. C. (2012). High-efficiency acousto-optical interaction in phoxonic nanobeam waveguide. Applied Physics Letters, 100(17), [171103]. https://doi.org/10.1063/1.4705295

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