27 February 2012 One-half milliwatt 2.31 THz continuous-wave QCL operating at 77K
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Proceedings Volume 8261, Terahertz Technology and Applications V; 82610K (2012) https://doi.org/10.1117/12.906732
Event: SPIE OPTO, 2012, San Francisco, California, United States
Abstract
THz semi-insulating surface plasmon waveguide QCL's based on the bound-to-continuum design have been developed with 2.31 THz output powers of ~0.5 milliwatt from a single facet, input powers of ~5 watts, and threshold current densities of 117 A/cm2 operating continuous wave at 77K. These results were achieved by depositing alloy metal on both contact layers, only annealing the bottom metal layers, and thinning the substrate thickness to ~170 μm to assure good heat dissipation. The structure was based on a previously published 2.83 THz design that was scaled to emit at 2.31 THz. The demonstration of this high temperature, high power laser with low input power enables its use in compact, coherent THz transceivers for heterodyne detection with liquid nitrogen cooling.
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Xifeng Qian, Neelima Chandrayan, Shivashankar R. Vangala, William D. Goodhue, Andriy A. Danylov, Jerry Waldman, Christopher Baird, Robert H. Giles, William E. Nixon, "One-half milliwatt 2.31 THz continuous-wave QCL operating at 77K", Proc. SPIE 8261, Terahertz Technology and Applications V, 82610K (27 February 2012); doi: 10.1117/12.906732; https://doi.org/10.1117/12.906732
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