Dual wavelength emission from a terahertz quantum cascade laser

Journal Article · Fri Dec 23 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3666454· OSTI ID:21612409

Freeman, Joshua R; Brewer, Anthony; Marshall, Owen P; Beere, Harvey E; Ritchie, David A ^[1]; Madeo, Julien; Dhillon, Sukhdeep; Jukam, Nathan; Oustinov, Dimitri; Tignon, Jerome ^[2]

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1. Semiconductor Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE (United Kingdom)
2. Laboratoire Pierre Aigrain, Ecole Normale Suprieure, UMR 8551 CNRS, UPMC Univ. Paris 6 75005 Paris (France)

We describe a heterogeneous THz quantum cascade laser that is composed of two different active region designs. This device emits simultaneously at around 2.5 THz and 2.9 THz with a 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 behaviour of the two stack device.

• OSTI ID: 21612409
• Journal Information: AIP Conference Proceedings, Vol. 1399, Issue 1; Conference: 30. international conference on the physics of semiconductors, Seoul (Korea, Republic of), 25-30 Jul 2010; Other Information: DOI: 10.1063/1.3666454; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALIGNMENT
DESIGN
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
EMISSION
FREQUENCY MEASUREMENT
GAIN
LASERS
SEMICONDUCTOR DEVICES
SPECTROSCOPY
WAVELENGTHS
AMPLIFICATION
CURRENTS