Title :
Injection seeding of metal-metal terahertz quantum cascade lasers
Author :
Maussang, K. ; Wang, F. ; Brewer, A. ; Freeman, Joshua R. ; Maysonnave, J. ; Moumdji, S. ; Colombelli, R. ; Li, Luoqing ; Linfield, Edmund H. ; Davies, A. Giles ; Beere, H.E. ; Ritchie, D.A. ; Tignon, J. ; Dhillon, S.S.
Author_Institution :
Lab. Pierre Aigrain, Univ. P. et M. Curie, Paris, France
Abstract :
We show the coherent detection of the laser emission from seeded terahertz (THz) quantum cascade lasers (QCL) with metal-metal waveguides using free-space coupling of a THz pulses to the sub-wavelength waveguide. We implement a simple, monolithic planar horn antenna design on the metal-metal waveguide that reduces the impedance mismatch to the waveguide. The laser emission is seeded and coherently detected using electro-optic sampling. Injection seeding of metal-metal waveguides with a LO phonon depopulation design at liquid nitrogen temperatures is also demonstrated.
Keywords :
electro-optical effects; horn antennas; planar antennas; quantum cascade lasers; submillimetre wave lasers; waveguide lasers; LO phonon depopulation; QCL; THz pulses; coherent detection; electro-optic sampling; free-space coupling; impedance mismatch; injection seeding; laser emission; liquid nitrogen temperatures; metal-metal terahertz quantum cascade lasers; metal-metal waveguides; monolithic planar horn antenna; seeded terahertz quantum cascade lasers; sub-wavelength waveguide; Coherence; Electric fields; Horn antennas; Planar waveguides; Quantum cascade lasers; Time-domain analysis; Waveguide lasers;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956454
