Qian Linyong, Zhang Xin, Yang Zhengweiyi, Xu Shuozhe, Qiu Yun, Wang Kangni
Opt Lett. 2024 Mar 1;49(5):1317-1320. doi: 10.1364/OL.516509.
Lasers based on the resonant nanostructures have attracted much attention due to their low threshold and compact dimensions. Guided-mode resonance (GMR) structures have been studied in lasing configurations because of their optical field enhancement and convenient free space excitation. However, the GMR inherently requires a larger footprint and is not suitable for high-density packaging. Here, we present numerical evidence of a miniaturized laser implemented in a one-dimensional finite heterostructure cavity (FHC). A GMR resonator and distributed Bragg reflectors are integrated to create the FHC, which enables the efficient coupling and localization of the electric field. Numerical findings indicate that the threshold is approximately 22.5 µJ/cm, while the emission region is confined within a length of 5.4 µm. In addition, by adjusting the coupling strength, it is capable to achieve controllable lasing emission. The proposed structure provides a compact source for high-capacity optical communications, sensing, and quantum information processing.
基于共振纳米结构的激光器因其低阈值和紧凑尺寸而备受关注。由于其光场增强和方便的自由空间激发特性，导模共振（GMR）结构已在激光配置中得到研究。然而，GMR本质上需要更大的占地面积，不适合高密度封装。在此，我们展示了在一维有限异质结构腔（FHC）中实现的小型化激光器的数值证据。将GMR谐振器和分布式布拉格反射器集成在一起以创建FHC，这能够实现电场的有效耦合和局域化。数值结果表明，阈值约为22.5 μJ/cm，而发射区域限制在5.4 μm的长度范围内。此外，通过调整耦合强度，能够实现可控的激光发射。所提出的结构为高容量光通信、传感和量子信息处理提供了一个紧凑的光源。
