Single-mode operation of terahertz quantum cascade lasers with distributed feedback resonators

Single-mode operation at 4.4 THz is obtained from distributed-feedback quantum-cascade lasers with complex-coupling metallic gratings. The emission shows a stable side-mode suppression of more than 20 dB at all injection currents and operating temperatures

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Bibliographic Details
Published in:Applied physics letters 2004-06, Vol.1 (26), p.2 pp. vol.1-5448
Main Authors: Mahler, L., Kohler, R., Tredicucci, A., Beltram, F., Beere, H.E., Linfield, H., Ritchie, D.A., Davies, A.G.
Format: Article
Language:English
Subjects:
Distributed feedback devices
Gratings
Laser feedback
Laser stability
Laser tuning
Optical resonators
Quantum cascade lasers
Semiconductor lasers
Temperature
Waveguide lasers
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Description
Summary:Single-mode operation at 4.4 THz is obtained from distributed-feedback quantum-cascade lasers with complex-coupling metallic gratings. The emission shows a stable side-mode suppression of more than 20 dB at all injection currents and operating temperatures
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1767957