Cao Fengzhao, Niu Lianze, Tong Junhua, Li Songtao, Hayat Anwer, Wang Meng, Zhai Tianrui, Zhang Xinping
Opt Express. 2018 May 14;26(10):13383-13389. doi: 10.1364/OE.26.013383.
Distributed feedback lasing and surface plasmon lasing were achieved in a single laser device. The laser cavity consisted of a four-layer structure including two metal films, a grating, and a gain material; the cavity was fabricated by combining interference lithography and metal evaporation. A hollow structure was employed to overcome the Joule losses of the metal film. The total thickness of the multilayer structure was 350 nm. The lasing threshold for this hybrid lasing was decreased significantly owing to the coupling between the SP mode in two metal films and the waveguide mode. The combination of SP lasing and distributed feedback lasing could benefit the design of biosensors, all-optical circuits, and electrically pumped devices.
在单个激光器件中实现了分布式反馈激光和表面等离子体激光。激光腔由包括两个金属膜、一个光栅和一种增益材料的四层结构组成；该腔通过干涉光刻和金属蒸发相结合的方法制造。采用中空结构来克服金属膜的焦耳损耗。多层结构的总厚度为350纳米。由于两个金属膜中的表面等离子体模式与波导模式之间的耦合，这种混合激光的激射阈值显著降低。表面等离子体激光与分布式反馈激光的结合有利于生物传感器、全光电路和电泵浦器件的设计。
