摘要
We report an indium phosphide nanowire (NW)-induced cavity in a silicon planar photonic crystal (PPC) waveguide to improve the light-NW coupling. The integration of NW shifts the transmission band of the PPC waveguide into the mode gap of the bare waveguide, which gives rise to a microcavity located on the NW section. Resonant modes with Q factors exceeding 103 are obtained. Leveraging on the high density of the electric field in the microcavity, the light-NW interaction is enhanced strongly for efficient nonlinear frequency conversion. Second-harmonic generation and sum-frequency generation in theNWare realized with a continuous-wave pump laser in a power level of tens of microwatts, showing a cavity-enhancement factor of 112. The hybrid integration structure of NW-PPC waveguide and the self-formed microcavity not only opens a simple strategy to effectively enhance light-NW interactions, but also provides a compact platform to construct NW-based on-chip active devices.
源语言 | 英语 |
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页(从-至) | 1734-1741 |
页数 | 8 |
期刊 | Photonics Research |
卷 | 8 |
期 | 11 |
DOI | |
出版状态 | 已出版 - 22 10月 2020 |