Broadband monolithic extractor for metal-metal waveguide based terahertz quantum cascade laser frequency combs
Optics
2017-07-13 v1
Abstract
We present a monolithic solution to extract efficiently light from terahertz quantum cascade lasers with metal-metal waveguides suitable for broadband frequency comb applications. The design is optimized for a bandwidth of 500 GHz around a center frequency of 2.6 THz. A five-fold increase in total output power is observed compared to standard metal-metal waveguides. The extractor features a single-lobed far-field pattern and increases the frequency comb dynamical range to cover more than 50 % of the laser dynamic range. Frequency comb operation up to a spectral bandwidth of 670 GHz is achieved.
Cite
@article{arxiv.1703.10036,
title = {Broadband monolithic extractor for metal-metal waveguide based terahertz quantum cascade laser frequency combs},
author = {Markus Rösch and Ileana-Cristina Benea-Chelmus and Christopher Bonzon and Martin J. Süess and Mattias Beck and Jérôme Faist and Giacomo Scalari},
journal= {arXiv preprint arXiv:1703.10036},
year = {2017}
}