Analysis of surface emitting distributed-feedback quantum cascade laser based on a surface-plasmon waveguide

作者：Wanhong Guo^*; Quanyong Lu; Junqi Liu; Wei Zhang; Yuchao Jiang; Lu Li; Lijun Wang; Fengqi Liu; Zhanguo Wang

来源：Chinese Journal of Semiconductors, 2010, 31(11): 1140141-1140145.

DOI：10.1088/1674-4926/31/11/114014

• Coupled-mode theory
• Distributed-feedback
• Floquet
• Infinite periodic structure
• Optimized devices
• Out-coupling efficiency
• Quantum cascades
• Second-order grating
• Surface emission
• Surface emitting
• Surface plasmon waveguide
• Threshold gain
• Typical values

An analysis of a surface emitting distributed-feedback quantum cascade laser (DFB QCL) based on a surface-plasmon waveguide is presented. The second-order grating realized by the sole patterning of the top metal provides strong feedback. The analysis is based on a coupled-mode theory derived from exact Floquet-Bloch solutions of the infinite periodic structure. The surface outcoupling efficiency and threshold gain for the optimized device design are 43% and 12 cm-1, respectively, which represent great improvements on the conventional dielectric waveguide based DFB QCL with typical values of 17.5% and 20 cm-1. ? 2010 Chinese Institute of Electronics.

• 出版日期2010