钙钛矿微腔的激子极化激元特性及低阈值激光器件研究

项目名称： 钙钛矿微腔的激子极化激元特性及低阈值激光器件研究

项目编号： No.61774003

项目类型： 面上项目

立项/批准年度： 2018

项目学科： 无线电电子学、电信技术

项目作者： 张青

作者单位： 北京大学

项目金额： 16万元

中文摘要： 微型半导体激光器件的研发是当前光电信息领域的前沿课题之一，对光子集成芯片、高分辨显示成像、高精度加工等领域有著极其重要的意义。由于大多数低维半导体材料表面态活跃、缺陷浓度高、俄歇复合阈值低，因而基于半导体微纳结构而设计的光子激光器依然具有很高的阈值，电注入时产生的巨大热效应也导致电泵浦的激光器难以实现，极大地阻碍了半导体微型激光器的实际应用。针对这一难题，本项目拟基于新型金属卤化物钙钛矿半导体材料，利用其优异的激子特性，制备高质量单晶有机-无机、纯无机钙钛矿微纳结构，与结构自身及外来光学微腔强耦合，实现室温下的激子极化激元，为进一步实现低阈值极化子激元凝聚与激光奠定坚实的基础。

中文关键词： 微腔激光器；半导体微腔激光器；光学微腔；回音壁模式；微柱

英文摘要： Small laser, or micro/nano-sized laser, is one of most important issues in opto-electronics for its great potentials in optical chips, optical communications, high-resolution image, manufacturing, etc. However, due to high density of surface and defect stats, low Auger recombination threshold, till now the micro/nano-sized lasers still suffer from their high thresholds. It is still difficult to realize electrically-driven small photonic laser due to large heat effect under lasing status, which extensively blocks the practical applications of small lasers. Here, we propose to develop low threshold exciton-polariton laser by using metal halide perovskites, which show outstanding excitonic and electrical properties. With the aiming of exciton-polariton condensation, we will fabricate both of high quality single crystalline nanostructures (nanowire, nanoplatelets, etc) serving as active microcavities and thin films coupled with high passive microcavities to realized room temperature exciton polariton. The studies will greatly push the development of low threshold electrically-driven small lasers.

英文关键词： Miicrolaser;Semiconductor Microlaserr;Microcavity;Whispering-Gallery-Mode;Microrod