Chang Chia-Jui, Chen Lih-Ren, Hong Kuo-Bin, Lu Tien-Chang
Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu City, 30010, Taiwan.
Semiconductor Research Center, Hon Hai Research Institute, Taipei City, 23678, Taiwan.
Discov Nano. 2023 Oct 30;18(1):134. doi: 10.1186/s11671-023-03911-8.
Photonic-crystal surface-emitting lasers have many promising properties over traditional semiconductor lasers and are regarded as the next-generation laser sources. However, the minimum achievable lasing threshold of PCSELs is still several times larger than that of VCSELs, and limiting its applications especially if the required power is small. Here, we propose a new design that reduces the gain region in the lateral plane by using selective quantum-well intermixing to reduce the threshold current of PCSELs. By performing theoretical calculations, we confirmed that the threshold current can be lowered by a factor of two to three while keeping the PCSEL's advantage of small divergence angle.
与传统半导体激光器相比，光子晶体表面发射激光器具有许多有前景的特性，被视为下一代激光源。然而，光子晶体表面发射激光器可实现的最低激射阈值仍比垂直腔面发射激光器大几倍，这限制了其应用，特别是在所需功率较小的情况下。在此，我们提出一种新设计，通过使用选择性量子阱混合来减小光子晶体表面发射激光器横向平面中的增益区域，从而降低其阈值电流。通过进行理论计算，我们证实，在保持光子晶体表面发射激光器发散角小这一优势的同时，阈值电流可降低两到三倍。
