TITLE

Dual wavelength emission from a terahertz quantum cascade laser

AUTHOR(S)
Freeman, Joshua R.; Madéo, Julien; Brewer, Anthony; Dhillon, Sukhdeep; Marshall, Owen P.; Jukam, Nathan; Oustinov, Dimitri; Tignon, Jerome; Beere, Harvey E.; Ritchie, David A.
PUB. DATE
February 2010
SOURCE
Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p051120
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We describe a heterogeneous terahertz (THz) quantum cascade laser that is composed of two different active region designs. This device emits simultaneously at around 2.5 and 2.9 THz with certain frequency tunability by applied current. We also investigate the spectral gain in the structure by THz time-domain spectroscopy and correlate the gain spectral bandwidth with the alignment and wavelength emission behavior of the two stack device.
ACCESSION #
47929067

 

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