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Proceedings Paper

Recent advances of terahertz quantum cascade lasers
Author(s): Manijeh Razeghi
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Paper Abstract

In the past decade, tremendous development has been made in GaAs/AlGaAs based THz quantum cascade laser (QCLs), however, the maximum operating temperature is still limited below 200 K (without magnetic field). THz QCL based on difference frequency generation (DFG) represents a viable technology for room temperature operation. Recently, we have demonstrated room temperature THz emission (~ 4 THz) up to 8.5 μW with a power conversion efficiency of 10 μW/W2. A dual-period distributed feedback grating is used to filter the mid-infrared spectra in favor of an extremely narrow THz linewidth of 6.6 GHz.

Paper Details

Date Published: 7 September 2011
PDF: 6 pages
Proc. SPIE 8119, Terahertz Emitters, Receivers, and Applications II, 81190D (7 September 2011); doi: 10.1117/12.899131
Show Author Affiliations
Manijeh Razeghi, Northwestern Univ. (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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