Quantum-cascade lasers operating at 4.7, 3.5, and 2.3 THz have been used to achieve cyclotron resonance in InAs and InSb quantum wells from liquid-helium temperatures to room temperature. This represents one of the first spectroscopic applications of terahertz quantum-cascade lasers. Results show that these compact lasers are convenient and reliable sources with adequate power and stability for this type of far-infrared magneto-optical study of solids. Their compactness promises interesting future applications in solid-state spectroscopy.
© 2004 Optical Society of America
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.5960) Lasers and laser optics : Semiconductor lasers
(300.6270) Spectroscopy : Spectroscopy, far infrared
(300.6470) Spectroscopy : Spectroscopy, semiconductors
Diane C. Larrabee, Giti A. Khodaparast, Frank K. Tittel, Jun Kono, Giacomo Scalari, Lassaad Ajili, Jerome Faist, Harvey Beere, Giles Davies, Edmund Linfield, David Ritchie, Yoji Nakajima, Masato Nakai, Shigehiko Sasa, Masataka Inoue, Seokjae Chung, and Michael B. Santos, "Application of terahertz quantum-cascade lasers to semiconductor cyclotron resonance," Opt. Lett. 29, 122-124 (2004)