超灵敏硅光子晶体纳米束电光调制器：设计与仿真

Ultrasensitive silicon photonic-crystal nanobeam electro-optical modulator: design and simulation.

作者信息

Hendrickson Joshua, Soref Richard, Sweet Julian, Buchwald Walter

出版信息

Opt Express. 2014 Feb 10;22(3):3271-83. doi: 10.1364/OE.22.003271.

DOI:10.1364/OE.22.003271

Abstract

Design and simulation results are presented for an ultralow switching energy, resonator based, silicon-on-insulator (SOI) electro-optical modulator. The nanowire waveguide and Q ~8500 resonator are seamlessly integrated via a high-transmission tapered 1D photonic crystal cavity waveguide structure. A lateral p-n junction of modulation length L(m) ~λ is used to alter the index of refraction and, therefore, shift the resonance wavelength via fast carrier depletion. Differential signaling of the device with ΔV ~0.6 Volts allows for a 6 dB extinction ratio at telecom wavelengths with an energy cost as low as 14 attojoules/bit.

摘要

本文展示了一种基于绝缘体上硅（SOI）的超低开关能量谐振器电光调制器的设计及仿真结果。纳米线波导与品质因数Q约为8500的谐振器通过高透射率的锥形一维光子晶体腔波导结构无缝集成。利用调制长度L(m)约为λ的横向p-n结来改变折射率，进而通过快速载流子耗尽使谐振波长发生偏移。该器件采用差分信号传输，ΔV约为0.6伏，在电信波长下可实现6分贝的消光比，且每比特的能量成本低至14阿托焦耳。