ArticleACS photonics2020
Terahertz Frequency Combs Exploiting an On-Chip, Solution-Processed, Graphene-Quantum Cascade Laser Coupled-Cavity.
Article in ACS photonics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Aspects of cavity engineering in THz quantum cascade laser frequency combs.Nanophotonics (Berlin, Germany) · 2025Article
- Theoretical model of passive mode-locking in terahertz quantum cascade lasers with distributed saturable absorbers.Nanophotonics (Berlin, Germany) · 2024Article
- Harmonic quantum cascade laser terahertz frequency combs enabled by multilayer graphene top-cavity scatters.Nanophotonics (Berlin, Germany) · 2024Article
- Electrically Tunable Nonlinearity at 3.2 Terahertz in Single-Layer Graphene.ACS photonics · 2023Article
- Real-Time Measure of the Lattice Temperature of a Semiconductor Heterostructure Laser via an On-Chip Integrated Graphene Thermometer.ACS nano · 2023Article
- Self-Induced Mode-Locking in Electrically Pumped Far-Infrared Random Lasers.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2023Article
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Authors and funding
14 authors.
Funding
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Abstract
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.
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Registered trials
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