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具有超低值的单层半导体纳米洞激光器

Sanfeng Wu¹, Sonia Buckley², John R Schaibley¹

¹Department of Physics, University of Washington, Seattle, Washington 98195, USA.

|March 18, 2015

概括

研究人员开发了一种新的纳米级激光器,在光子晶体腔中使用化单层. 这一突破为集成光子学和光通信提供了低值,电驱动的纳米激光器.

科学领域:

纳米光子学和量子光学
材料科学与工程材料科学与工程
固态物理固态物理

背景情况:

光子空洞通过空洞量子电动力学 (普塞尔效应) 提高光发射器性能.
以前的超低值纳米级激光器在光子晶体腔 (PCC) 中使用了量子点.
量子点PCC激光器面临挑战:随机定位,组合变化,难以注入电流和电子兼容性差.

研究的目的:

开发一种新的激光战略,克服基于量子点的纳米级激光器的局限性.
创建一个超低值,连续波 (CW) 纳米激光器,提高实用性和集成潜力.
展示一个可扩展和电子兼容的纳米激光架构,用于芯片上的光通信.

主要方法:

作为增强介质,使用了原子薄的tungsten diselenide (WSe2) 单层.
在预制光子晶体腔 (PCC) 上非破坏性地和确定性地引入了WSe2单层.
采用光学送来实现激光,并研究了表面增益几何.

主要成果:

实现了在可见模式下运行的CW纳米激光器,其光学接值低至130K的27纳瓦.
单层WSe2增强介质将激子限制在PCC表面1nm以内,这对于激光作用至关重要.
通过外部控制,例如静电门和电流注入,证明了电气的运行潜力.

结论:

在PCC架构上的WSe2单层为量子点激光器提供了可行的替代方案,提供了改进的控制和集成.
表面增益几何学允许前所未有的可访问性来定制增益特性和外部电气控制.
这种可扩展的方案与集成光子学兼容,为先进的芯片内光通信技术铺平了道路.

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