Ultra-broadband THz semiconductor laser based on heterogeneous quantum cascade gain medium

Dana Turcinkova; Giacomo Scalari; Fabrizio Castellano; Maria I. Amanti; Mattias Beck; Jérôme Faist

doi:10.1364/CLEO_SI.2011.CMF4

CLEO:2011 - Laser Applications to Photonic Applications
OSA Technical Digest (CD) (Optica Publishing Group, 2011),
paper CMF4
•https://doi.org/10.1364/CLEO_SI.2011.CMF4

Ultra-broadband THz semiconductor laser based on heterogeneous quantum cascade gain medium

Dana Turcinkova, Giacomo Scalari, Fabrizio Castellano, Maria I. Amanti, Mattias Beck, and Jérôme Faist

CLEO: Science and Innovations 2011

Baltimore, Maryland United States
1–6 May 2011
ISBN: 978-1-55752-910-7

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Terahertz Quantum Cascade Lasers (CMF)

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D. Turcinkova, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, "Ultra-broadband THz semiconductor laser based on heterogeneous quantum cascade gain medium," in CLEO:2011 - Laser Applications to Photonic Applications, OSA Technical Digest (CD) (Optica Publishing Group, 2011), paper CMF4.

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Abstract

We report broadband laser emission from a quantum cascade laser based on heterogeneous gain medium. Gapless emission exceeding 1 THz bandwidth is reported around 2.66 THz (40% of the central frequency) from devices operating in double metal waveguides. Pulsed operating temperatures of 125 K with peak powers of 14 mW at 10 K are observed. CW operation is demonstrated and 1 THz bandwidth is observed above 80 K in pulsed mode. Time-resolved spectral analysis with 5 ns resolution revealing strong mode competition is also discussed.

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