Zhu Si, Ma Xiang, Liu Can, Luo Wei, Liu Jia, Shi Bei, Guo Weihua, Lau Kei May
Opt Express. 2021 Apr 26;29(9):13193-13203. doi: 10.1364/OE.421037.
In this paper, we demonstrate an efficient and easy fabrication method for whispering-gallery-mode (WGM) manipulation and report the first electrically driven single-mode quantum dot micro-ring (QDMR) lasers. Using self-assembled InAs/InAlGaAs QD active layers with deeply etched azimuthal gratings, continuous-wave (CW) lasing with controllable single-mode emission wavelengths covering 1300 nm to 1370 nm has been achieved. A record-high side-mode-suppression-ratio (SMSR) value of 49 dB is obtained. These QDMR lasers exhibit excellent single-mode lasing stabilities over the current and temperature tuning range with a thermal tunability of 0.092 nm/°C. The concept is applicable to other wavelength bands depending on the gain spectrum, demonstrating a feasible solution in realizing energy-efficient and densely integrated photonic building blocks.
在本文中，我们展示了一种用于回音壁模式（WGM）操控的高效且简便的制造方法，并报道了首个电驱动单模量子点微环（QDMR）激光器。通过使用带有深度蚀刻方位光栅的自组装InAs/InAlGaAs量子点有源层，已实现了覆盖1300纳米至1370纳米的具有可控单模发射波长的连续波（CW）激射。获得了创纪录的49分贝的边模抑制比（SMSR）值。这些QDMR激光器在电流和温度调谐范围内表现出优异的单模激射稳定性，热调谐率为0.092纳米/°C。根据增益光谱，该概念适用于其他波段，为实现节能和高密度集成光子组件提供了一种可行的解决方案。
