State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University , Beijing 100871, P. R. China.
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST) , Beijing 100083, P. R. China.
ACS Nano. 2017 Jun 27;11(6):5808-5814. doi: 10.1021/acsnano.7b01417. Epub 2017 Jun 5.
Modulating lasing wavelength flexibly and repeatedly on a single rod is essential to the practical applications of micro/nanorod lasers. In this paper, a structure that decouples the gain medium and optical cavity is proposed, where the corresponding mechanism for the lasing wavelength shift is explained. Based on the above structure, one kind of wavelength continuously variable lasers is achieved on a single GaN/InGaN core-shell microrod without modifying the geometry of the resonant cavity or cutting the microrod. By using this method, lasing wavelength can be modulated from 372 to 408 nm flexibly and repeatedly in a 10 μm facilely synthesized microrod. This approach demonstrates a big application potential in numerous fields consisting of optical telecommunication and environmental monitoring.
在微/纳棒激光器的实际应用中，灵活、重复地调节激光波长至关重要。本文提出了一种解耦增益介质和光腔的结构，解释了激光波长移动的相应机制。基于上述结构，在不改变共振腔的几何形状或切割微棒的情况下，在单个 GaN/InGaN 核壳微棒上实现了一种波长连续可调谐激光器。通过这种方法，可以在一个 10 μm 简单合成的微棒中灵活、重复地将激光波长从 372nm 调谐到 408nm。这种方法在包括光通信和环境监测在内的众多领域具有很大的应用潜力。
