@inproceedings{9445b2d6e273410aaa4c8e303364e0b9,
title = "Room temperature continuous wave THz frequency comb based on quantum cascade lasers",
abstract = "Frequency combs, spectra of phase-coherent equidistant lines, have revolutionized time and frequency metrology. The recently developed quantum cascade laser (QCL) comb has exhibits great potential with high power and broadband spectrum. However, in the terahertz (THz) range, cryogenic cooling has to be applied for THz QCL combs. We report a room temperature THz frequency comb at 3.0 THz based on difference-frequency generation from a mid-IR QCL comb. A largely detuned distributed-feedback grating is integrated into the QCL cavity to provide the single mode operation as well as enhanced spatial hole-burning effect for multimode comb operation. Multiheterodyne spectroscopy with multiple equally spaced lines by beating it with a reference Fabry-P{\'e}rot comb confirms the THz comb operation. This type of THz comb provides a new solution to chip-based high-speed high-resolution THz spectroscopy with compact size at room temperature.",
keywords = "Four-wave mixing, Frequency comb, Group velocity dispersion, Quantum cascade lasers",
author = "M. Razeghi and Quanyong Lu and Feihu Wang and Donghai Wu and Slivken, {Steven Boyd}",
note = "Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Terahertz Emitters, Receivers, and Applications X 2019 ; Conference date: 11-08-2019 Through 13-08-2019",
year = "2019",
doi = "10.1117/12.2533903",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Manijeh Razeghi and Baranov, {Alexei N.} and Vitiello, {Miriam S.}",
booktitle = "Terahertz Emitters, Receivers, and Applications X",
}