Role of interface roughness in the transport and lasing characteristicsof quantum-cascade lasers

Role of interface roughness in the transport and lasing characteristicsof quantum-cascade lasers

A density-matrix based theory of transport and lasing in quantum-cascade lasers reveals that large disparity between luminescent linewidth and broadening of the tunneling transition changes the design guidelines to favor strong coupling between injector and upper laser level. This conclusion is supp...

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Bibliographic Details
Published in:Applied physics letters Vol. 94; no. 9; pp. 091101 - 091101-3
Main Authors: Khurgin, Jacob B., Dikmelik, Yamac, Liu, Peter Q., Hoffman, Anthony J., Escarra, Matthew D., Franz, Kale J., Gmachl, Claire F.
Format: Journal Article
Published: American Institute of Physics 03-03-2009
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Summary:A density-matrix based theory of transport and lasing in quantum-cascade lasers reveals that large disparity between luminescent linewidth and broadening of the tunneling transition changes the design guidelines to favor strong coupling between injector and upper laser level. This conclusion is supported by the experimental evidence.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3093819