BibTex format

author = {Mezzapesa, FP and Garrasi, K and Schmidt, J and Salemi, L and Pistore, V and Li, L and Davies, GA and Linfield, EH and Riesch, M and Jirauschek, C and Carey, T and Torrisi, F and Ferrari, AC and Vitiello, MS},
doi = {10.1021/acsphotonics.0c01523},
journal = {ACS Photonics},
pages = {3489--3498},
title = {Terahertz frequency combs exploiting an on-chip, solution-processed, graphene-quantum cascade laser coupled-cavity},
url = {},
volume = {7},
year = {2020}

RIS format (EndNote, RefMan)

AB - The ability to engineer quantum-cascade-lasers (QCLs) with ultrabroad gain spectra, and with a full compensation of the group velocity dispersion, at terahertz (THz) frequencies, is key for devising monolithic and miniaturized optical frequency-comb-synthesizers (FCSs) in the far-infrared. In THz QCLs four-wave mixing, driven by intrinsic third-order susceptibility of the intersubband gain medium, self-locks the optical modes in phase, allowing stable comb operation, albeit over a restricted dynamic range (∼20% of the laser operational range). Here, we engineer miniaturized THz FCSs, comprising a heterogeneous THz QCL, integrated with a tightly coupled, on-chip, solution-processed, graphene saturable-absorber reflector that preserves phase-coherence between lasing modes, even when four-wave mixing no longer provides dispersion compensation. This enables a high-power (8 mW) FCS with over 90 optical modes, through 55% of the laser operational range. We also achieve stable injection-locking, paving the way to a number of key applications, including high-precision tunable broadband-spectroscopy and quantum-metrology.
AU - Mezzapesa,FP
AU - Garrasi,K
AU - Schmidt,J
AU - Salemi,L
AU - Pistore,V
AU - Li,L
AU - Davies,GA
AU - Linfield,EH
AU - Riesch,M
AU - Jirauschek,C
AU - Carey,T
AU - Torrisi,F
AU - Ferrari,AC
AU - Vitiello,MS
DO - 10.1021/acsphotonics.0c01523
EP - 3498
PY - 2020///
SN - 2330-4022
SP - 3489
TI - Terahertz frequency combs exploiting an on-chip, solution-processed, graphene-quantum cascade laser coupled-cavity
T2 - ACS Photonics
UR -
UR -
VL - 7
ER -