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Proceedings Paper

One-half milliwatt 2.31 THz continuous-wave QCL operating at 77K
Author(s): Xifeng Qian; Neelima Chandrayan; Shivashankar R. Vangala; William D. Goodhue; Andriy A. Danylov; Jerry Waldman; Christopher Baird; Robert H. Giles; William E. Nixon
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Paper 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.

Paper Details

Date Published: 27 February 2012
PDF: 6 pages
Proc. SPIE 8261, Terahertz Technology and Applications V, 82610K (27 February 2012); doi: 10.1117/12.906732
Show Author Affiliations
Xifeng Qian, Univ. of Massachusetts Lowell (United States)
Neelima Chandrayan, Univ. of Massachusetts Lowell (United States)
Shivashankar R. Vangala, Univ. of Massachusetts Lowell (United States)
William D. Goodhue, Univ. of Massachusetts Lowell (United States)
Andriy A. Danylov, Univ. of Massachusetts Lowell (United States)
Jerry Waldman, Univ. of Massachusetts Lowell (United States)
Christopher Baird, Univ. of Massachusetts Lowell (United States)
Robert H. Giles, Univ. of Massachusetts Lowell (United States)
William E. Nixon, U. S. Army National Ground Intelligence Ctr. (United States)


Published in SPIE Proceedings Vol. 8261:
Terahertz Technology and Applications V
Laurence P. Sadwick; Créidhe M. O'Sullivan, Editor(s)

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