期刊
OPTICS EXPRESS
卷 20, 期 19, 页码 21235-21246出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.20.021235
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资金
- Australian Research Council (ARC) [DP1096838, FF0776056]
- Australian Research Council (ARC) through Center of Excellence CUDOS [CE110001018]
- U.S. Department of Defense through AFOSR/AOARD [FA23861114030]
- Australian Research Council [FF0776056, DP1096838] Funding Source: Australian Research Council
We propose a scheme for on-chip isolation in chalcogenide (As2S3) rib waveguides, in which Stimulated Brillouin Scattering is used to induce non-reciprocal mode conversion within a multi-moded waveguide. The design exploits the idea that a chalcogenide rib buried in a silica matrix acts as waveguide for both light and sound, and can also be designed to be multi-moded for both optical and acoustic waves. The enhanced opto-acoustic coupling allows significant isolation (> 20 dB) within a chip-scale (cm-long) device (< 10 cm). We also show that the bandwidth of this device can be dramatically increased by tuning the dispersion of the waveguide to match the group velocity between optical modes: we find that 20 dB isolation can be extended over a bandwidth of 25 nm. (C) 2012 Optical Society of America
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