On-chip, self-detected THz dual-comb spectrometer
Optics
2016-05-02 v1
Abstract
We present a directly generated on-chip dual-comb source at THz frequencies. The multi-heterodyne beating signal of two free-running THz quantum cascade laser frequency combs is measured electrically using one of the combs as a detector, fully exploiting the unique characteristics of quantum cascade active regions. Up to 30 modes can be detected corresponding to a spectral bandwidth of 630 GHz, being the available bandwidth of the dual comb configuration. The multi-heterodyne signal is used to investigate the equidistance of the comb modes showing an accuracy of at the carrier frequency of 2.5 THz.
Cite
@article{arxiv.1602.00537,
title = {On-chip, self-detected THz dual-comb spectrometer},
author = {Markus Rösch and Giacomo Scalari and Gustavo Villares and Lorenzo Bosco and Mattias Beck and Jérôme Faist},
journal= {arXiv preprint arXiv:1602.00537},
year = {2016}
}