Distributed feedback terahertz quantum-cascade lasers emitting at 4.34 and 4.43 THz are presented. Mode selection is based on a complex-coupling scheme implemented into the top-contact layer by a combination of wet chemical etching and ohmic-contact deposition. Single-mode emission stable at all injection currents and operating temperatures is shown, with a side-mode suppression ratio exceeding 20 dB. Peak output powers of up to 1.8 mW are obtained at low temperatures. (C) 2004 American Institute of Physics.

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

TREDICUCCI, ALESSANDRO;
2004

Abstract

Distributed feedback terahertz quantum-cascade lasers emitting at 4.34 and 4.43 THz are presented. Mode selection is based on a complex-coupling scheme implemented into the top-contact layer by a combination of wet chemical etching and ohmic-contact deposition. Single-mode emission stable at all injection currents and operating temperatures is shown, with a side-mode suppression ratio exceeding 20 dB. Peak output powers of up to 1.8 mW are obtained at low temperatures. (C) 2004 American Institute of Physics.
Mahler, L; Kohler, R; Tredicucci, Alessandro; Beltram, F; Beere, He; Linfield, Eh; Ritchie, Da; Davies, Ag
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/495153
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