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Proceedings Paper

Temperature effects in terahertz step well quantum cascade structures with diagonal optical transitions
Author(s): Will Freeman; Gamani Karunasiri
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Paper Abstract

Temperature effects in terahertz (THz) step well quantum cascade (QC) structures are investigated. Step well QC structures with diagonal optical transitions that use fast intrawell electron-longitudinal optical (LO) phonon scattering for depopulation are considered. A density matrix method is used to model the electron transport coherence and is incorporated into the Monte Carlo simulations of these structures. A phenomenological dephasing time is also included. The influence of the lattice temperature on the population inversion is modeled and the effects due to gain spectral broadening are also considered. Optical gain greater than typical waveguide resonator thresholds are estimated out to T ~ 200 K.

Paper Details

Date Published: 7 September 2011
PDF: 7 pages
Proc. SPIE 8119, Terahertz Emitters, Receivers, and Applications II, 81190A (7 September 2011); doi: 10.1117/12.894223
Show Author Affiliations
Will Freeman, Naval Air Warfare Ctr. (United States)
Gamani Karunasiri, Naval Postgraduate School (United States)


Published in SPIE Proceedings Vol. 8119:
Terahertz Emitters, Receivers, and Applications II
Manijeh Razeghi; Nicolas Péré-Laperne; Henry O. Everitt; John M. Zavada; Tariq Manzur, Editor(s)

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