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Proceedings Paper

Recent development of high-power widely tunable THz quantum cascade laser sources based on difference-frequency generation
Author(s): M. Razeghi; Q. Y. Lu; N. Bandyopadhyay; S. Slivken
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Paper Abstract

We present the recent development of high performance compact THz sources based on intracavity nonlinear frequency mixing in mid-infrared quantum cascade lasers. Significant performance improvements of our THz sources with respect to the continuous wave THz power output, monolithic THz tuning, and widely frequency are achieved by systematic optimization of the device's active region, waveguide design, and chip bonding strategy. Room temperature continuous wave THz power of more than 10 μW at 3.4 THz is demonstrated at room temperature. Monolithic THz tuning of a chip-based THz source from 2.6 to 4.2 THz with power up to 0.1 mW is achieved. Surface emission from the substrate via a diffraction grating with THz power up to 0.5 mW is also obtained. The developing characteristics show the potential for these THz sources as local oscillators for many astronomical and medical applications.

Paper Details

Date Published: 31 August 2015
PDF: 7 pages
Proc. SPIE 9585, Terahertz Emitters, Receivers, and Applications VI, 958502 (31 August 2015); doi: 10.1117/12.2192221
Show Author Affiliations
M. Razeghi, Northwestern Univ. (United States)
Q. Y. Lu, Northwestern Univ. (United States)
N. Bandyopadhyay, Northwestern Univ. (United States)
S. Slivken, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 9585:
Terahertz Emitters, Receivers, and Applications VI
Manijeh Razeghi; Alexei N. Baranov; John M. Zavada; Dimitris Pavlidis, Editor(s)

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