Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics
Brewer, A, Freeman, JR, Cavalie, P et al. (5 more authors)
(2014)
Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics.
Applied Physics Letters, 104 (8).
ARTN 081107.
ISSN 0003-6951
Abstract
Coherent detection of emission from quantum cascade lasers with metal-metal waveguides is demonstrated through free-space coupling of a THz pulse to the sub-wavelength waveguide. We implement a simple, monolithic planar horn antenna design on the metal-metal waveguide that reduces the impedance mis-match to the waveguide. The resulting devices show up to 10 times more directed output power than conventional metal-metal waveguides. This enhanced coupling to free-space allows a more efficient injection of broad-band THz pulses into the waveguide. Through this, we are able to seed the laser emission and coherently detect the laser emission by electro-optic sampling.
Metadata
Authors/Creators:
Brewer, A
Freeman, JR
Cavalie, P
Maysonnave, J
Tignon, J
Dhillon, SS
Beere, HE
Ritchie, DA
Copyright, Publisher and Additional Information:
(c) 2014, Author(s). Reproduced in accordance with the publisher's self-archiving policy.
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CORE (COnnecting REpositories)