标 题：可集成微纳激光器（Micro & Nano Lasers for Integration）
时 间： 2020 年 12 月 16 日 14 : 30 – 17 : 30
地 点： 新光电信息大楼 C114 室
报告人： 张昭宇，香港中文大学（深圳）副教授 、半导体激光器重点实验室主任
邀请人： 李德慧 教授
报告摘要：
With the fast development of optical communication and data center, the ultrasmall lasers that can be monolithically integrated with silicon photonics/electronics will be an important solution for lowering the loss and cost. This talk will present the low-threshold lasing in InAs/GaAs quantum dot microdisk and photonic crystal lasers monolithically grown on on-axis Si (001) substrate. The lasing emission of microdisk lasers with a sub-wavelength scale (diameter ~1.1 μm) was demonstrated, of which an ultra-low threshold ~3 μW was obtained. Lasing emission from both the ground state and higher excited states were observed. Besides, the ultra-small photonic crystal membrane lasers monolithically grown on CMOS-compatible Si substrate was also demonstrated. The photonic crystal lasers were continuous-wave optically pumped under room-temperature with a low threshold ～1.2 μW and operated up to 70 0C, which provide an advanced route of densely integrated laser sources for chip-scale photonic integrated circuits. The promising lasing characteristics of the microdisk and photonic crystal lasers with low lasing threshold and small footprint provide a viable route towards large-scale, low-cost integration of laser sources on a silicon platform.
报告人介绍：
张昭宇是香港中文大学（深圳）副教授，同时为深圳市半导体激光器重点实验室主任。他于2007年获美国加州理工学院电子工程博士学位，毕业后在美国加州大学伯克利分校从事三年的博士后工作。他于2011年入职北京大学深圳研究生院任副教授，2015年转聘香港中文大学（深圳）。课题组科研方向包括无机半导体材料激光器和有机半导体激光器两块。
1. 无机半导体激光器方向围绕可单片集成的硅基微纳激光器的研发展开工作，分别在近红外通信波段及中红外波段开展激光器的设计、制成和理论研究。2. 有机半导体激光器方向围绕有机微纳LED和激光器的设计、制成和理论展开研究，发光材料包含有机材料及钙钛矿。近三年课题组在Nature Communication, Advanced Materials, Physics Review Letters, Optica, Photonics research, Optics Letters, Applied Physics Letters 等国际刊物发表多篇一作/通信作者文章。
