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Distributed Feedback THz Quantum-Cascade Lasers Using Thin Double-Metallic Gratings

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6 Author(s)

Distributed feedback quantum-cascade lasers based on loss-coupled two-metal gratings are presented. Devices lasing on single longitudinal modes between 2.62 and 2.69 THz are demonstrated, with sidemode suppression of 30 dB. In addition, controllable grating coupling strength is demonstrated.

Published in:

Photonics Technology Letters, IEEE  (Volume:20 ,  Issue: 10 )