论文标题
超低阈值连续连续波量子点mini-bic激光器
Ultra-low threshold continuous-wave quantum dot mini-BIC lasers
论文作者
论文摘要
具有超低阈值和单模连续波（CW）操作的高度紧凑激光器已成为光子综合电路（PICS）的长期备受追捧的组件。在连续体（BICS）中，由于它们具有出色的捕获光和增强光结合相互作用的能力，因此在结合各种BIC腔和光学增益材料的激光构型中研究了连续体（BICS）的光子结合状态。但是，实现具有高度紧凑尺寸和超低CW阈值的BIC激光器仍然难以捉摸。我们通过在INAS/GAAS外延量子点（QD）增益膜上制造微型BIC腔，在1310 nm O波段范围内展示了室温CW BIC激光器。通过在所有三个维度上启用有效捕获光和载体，可以实现12μW（0.052 kW/cm^2）的超低阈值。单模激光也可以在仅至5*5个单位电池（〜2.5*2.5μm^2腔尺寸）的腔体中实现，模式体积为1.16（λ/N）^3。在较小的占地面积，超低功耗，制造的稳健性和对整合的适应性方面的优势，Mini-BIC激光器为未来的图片提供了旨在的透视光源，该图片旨在用于高容量的光学通信，感应和量子信息。
Highly compact lasers with ultra-low threshold and single-mode continuous wave (CW) operation have been a long sought-after component for photonic integrated circuits (PICs). Photonic bound states in the continuum (BICs), due to their excellent ability of trapping light and enhancing light-matter interaction, have been investigated in lasing configurations combining various BIC cavities and optical gain materials. However, the realization of BIC laser with a highly compact size and an ultra-low CW threshold has remained elusive. We demonstrate room temperature CW BIC lasers in the 1310 nm O-band wavelength range, by fabricating a miniaturized BIC cavity in an InAs/GaAs epitaxial quantum dot (QD) gain membrane. By enabling effective trapping of both light and carriers in all three dimensions, ultra-low threshold of 12 μW (0.052 kW/cm^2) is achieved. Single-mode lasing is also realized in cavities as small as only 5*5 unit-cells (~2.5*2.5 μm^2 cavity size) with a mode volume of 1.16(λ/n)^3. With its advantages in terms of a small footprint, ultralow power consumption, robustness of fabrication and adaptability for integration, the mini-BIC lasers offer a perspective light source for future PICs aimed at high-capacity optical communications, sensing and quantum information.
