Ultralow Power Nonlinear Response in an Si Photonic Crystal Nanocavity

作者：Zhang, Yong; Li, Danping; Zeng, Cheng; Shi, Yu; Huang, Zengzhi; Yu, Jinzhong; Xia, Jinsong^*

来源：IEEE Photonics Journal, 2013, 5(4): 6601409.

DOI：10.1109/JPHOT.2013.2273734

• Nonlinear optics
• integrated optics
• photonic crystals
• microcavity devices
• silicon

Optical nonlinear response and bistability behavior are observed in a fabricated silicon photonic crystal three defect-long (L3) nanocavity. The L3 cavity, which is coupled with a photonic crystal waveguide, has a quality factor of 60 000. Optical nonlinear response of the L3 cavity is observed at 4.65-mu W input power, and the threshold power for optical bistability in the L3 cavity is 26.1 mu W, which are the lowest values for silicon L3 cavities. A nonlinear coupled mode model is established to analyze nanocavity characteristics systematically. Numerical simulation results indicate that the ultralow power nonlinearity is due to the high Q factor and large thermal resistance of the nanocavity.

• 出版日期2013-8
• 单位华中科技大学