High-efficiency acousto-optical interaction in phoxonic nanobeam waveguide

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

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


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 languageEnglish
Article number171103
JournalApplied Physics Letters
Issue number17
Publication statusPublished - 2012 Apr 23

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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