Ground state terahertz quantum cascade lasers

Author(s)
Hu, Qing; Reno, John L.; Chan, Chun Wang Ivan
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Abstract
A terahertz quantum cascade laser (THz QCL) architecture is presented in which only the ground state subbands of each quantum well are involved in the transport and lasing transition. Compared to state-of-the art THz QCLs based on the resonant-phonon scheme, ground stateQCLs employ narrower wells so that all high-energy subbands are pushed up far above the occupied subband levels, significantly reducing parasitic interactions. Data on the experimental realization of two types of ground stateQCLs are presented, in which the result of lasing above 5 THz is demonstrated.
Date issued
2012-10
URI
http://hdl.handle.net/1721.1/86378
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Chan, Chun Wang I., Qing Hu, and John L. Reno. “Ground State Terahertz Quantum Cascade Lasers.” Appl. Phys. Lett. 101, no. 15 (2012): 151108. © 2012 American Institute of Physics
Version: Final published version
ISSN
00036951
1077-3118
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