(英)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
投稿时间:2016-07-05  最后修改时间:2016-08-13  点此下载全文
引用本文:邢恩博,戎佳敏,佟存柱,田思聪,汪丽杰,舒适立,王立军.(英)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].Xing En-Bo,Rong Jia-Min,Tong Cun-Zhu,Tian Si-Cong,Wang Li-Jie,Shu Shi-Li,Wang Li-Jun.Influence of microcavity effect on modulation response in 1.3 μm quantum dot photonic crystal nanocavity lasers[J].J.Infrared Millim.Waves,2017,36(2):160~166.]
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作者单位E-mail
邢恩博 中国科学院长春光学精密机械与物理研究所 xiaoxing1228@126.com 
戎佳敏 中国科学院长春光学精密机械与物理研究所  
佟存柱 中国科学院长春光学精密机械与物理研究所 xiaoxing1228@126.com 
田思聪 中国科学院长春光学精密机械与物理研究所  
汪丽杰 中国科学院长春光学精密机械与物理研究所  
舒适立 中国科学院长春光学精密机械与物理研究所  
王立军 中国科学院长春光学精密机械与物理研究所  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)No.61176046, No.11304308;国家重点基础研究发展计划(973计划):2013CB933300
中文摘要:微腔效应可以提高自发辐射速率,从而起到有效的改善响应调制速率的作用。然而,对于1.3 μm GaAs/InAs量子点光子晶体激光器而言,调制速率还会受到复杂的载流子动力学以及更近的空穴能级间隔的影响。因此本文中我们基于全路径载流子弛豫动力学方程,计算并讨论了腔品质因子(Q)对于阈值和响应调制特性的影响。计算结果表明,高的Q值能够明显改善量子点光子晶体激光器的阈值,但是同时快速增长的光子寿命会导致调制带宽的恶化。所以,存在一个优化的Q值(2500)可以获得超过100GHz的调制带宽,而当Q值为7000时,对应的能量传输损耗最低。因此,在量子点光子晶体纳腔激光器的设计中,更全面的考虑各方面的因素对器件的性能的影响,对于获得高速调制低功耗的量子点激光器器件是十分有意义的。
中文关键词:调制响应  光子晶体激光器  量子点  速率方程  阈值
 
Influence of microcavity effect on modulation response in 1.3 μm quantum dot photonic crystal nanocavity lasers
Abstract:It had been proposed that the microcavity 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 be not completely correct for the 1.3 μm GaAs based quantum dot (QD) photonics crystal (PhC) nanolasers due to the complex carrier dynamics and closer 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 ~ 7000. So an overall consideration is preferable in designing PhC nanocavity for both high speed and low energy consumption operation of QD lasers.
keywords:modulation response  photonics crystal laser  quantum dot  rate equation  threshold
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