红外与毫米波学报2017，Vol.36Issue(2)：160-166,7.DOI:10.11972/j.issn.1001-9014.2017.02.007
微腔效应对于1.3μm量子点光子晶体纳腔激光器调制响应的影响
Influence of microcavity effect on modulation response in 1.3 μm quantum dot photonic crystal nanocavity lasers
摘要
Abstract
It had been proposed that the rnicrocavity effect could enhance the spontaneous emission rate and hence dramatically increase the modulation speed.However,the work in this paper reveals that the situation might not be completely correct for the 1.3 μm GaAs based quantum dot (QD) photonics crystal (PhC) nanolasers due to the complex carrier dynamics and close hole levels.Based on the all-pathway rate equation model considering the carrier relaxation dynamics,the influences of quality (Q) factor of cavity on the threshold and modulation responses of 1.3 μm QD PhC nanolasers were studied.It is found that the high Q factor can improve significantly the threshold of QD PhC nanolasers,but it also increases the photon lifetime and deteriorates the modulation bandwidth.Hence there exists an optimized Q factor (～2500) for the nanolaser with a modulation bandwidth exceeding 100 GHz.For the energy consumption,the best value corresponds to a Q factor of ～ 7 000.So an overall consideration is preferable in designing PhC nanocavity for both high speed and low energy consumption operation of QD lasers.关键词
调制响应/光子晶体激光器/量子点/速率方程/阈值Key words
modulation response/photonics crystal laser/quantum dot/rate equation/threshold分类
信息技术与安全科学引用本文复制引用
邢恩博,戎佳敏,佟存柱,田思聪,汪丽杰,舒适立,王立军..微腔效应对于1.3μm量子点光子晶体纳腔激光器调制响应的影响[J].红外与毫米波学报,2017,36(2):160-166,7.基金项目
Supported by National Natural Science Foundation of China (61176046,11304308),National Basic Research Program of China (2013CB933300) （61176046,11304308）
