| Citation: |
Guo Wanhong, Lu Quanyong, Liu Junqi, Zhang Wei, Jiang Yuchao, Li Lu, Wang Lijun, Liu Fengqi, Wang Zhanguo. Analysis of surface emitting distributed-feedback quantum cascade laser based on a surface-plasmon waveguide[J]. Journal of Semiconductors, 2010, 31(11): 114014. doi: 10.1088/1674-4926/31/11/114014
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Guo W H, Lu Q Y, Liu J Q, Zhang W, Jiang Y C, Li L, Wang L J, Liu F Q, Wang Z G. Analysis of surface emitting distributed-feedback quantum cascade laser based on a surface-plasmon waveguide[J]. J. Semicond., 2010, 31(11): 114014. doi: 10.1088/1674-4926/31/11/114014.
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Analysis of surface emitting distributed-feedback quantum cascade laser based on a surface-plasmon waveguide
DOI: 10.1088/1674-4926/31/11/114014
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Abstract
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. -
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