ArticleLight, science & applications2020
Ultrafast response of harmonic modelocked THz lasers.
Article in Light, science & applications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 62 citations in OpenAlex.
- Effective Rabi frequency in ultrafast semiconductor lasers: self-starting harmonic frequency combs.Light, science & applications · 2026Article
- Effective discrete-level density matrix model for unipolar quantum optoelectronic devices.Nanophotonics (Berlin, Germany) · 2025Article
- High-power, high-wall-plug-efficiency quantum cascade lasers with high-brightness in continuous wave operation at 3-300μm.Light, science & applications · 2025Review
- Harmonic and Subharmonic RF Injection Locking of THz Metasurface Quantum-Cascade VECSEL.ACS photonics · 2024Article
- THz quantum gap: exploring potential approaches for generating and detecting non-classical states of THz light.Nanophotonics (Berlin, Germany) · 2024Article
- Ultrafast Pulse Generation from Quantum Cascade Lasers.Micromachines · 2022Review
- Field-resolved high-order sub-cycle nonlinearities in a terahertz semiconductor laser.Light, science & applications · 2021Article
- Active Terahertz Modulator and Slow Light Metamaterial Devices with Hybrid Graphene-Superconductor Photonic Integrated Circuits.Nanomaterials (Basel, Switzerland) · 2021Article
- Millimeter wave photonics with terahertz semiconductor lasers.Nature communications · 2021Article
- Terahertz Frequency Combs Exploiting an On-Chip, Solution-Processed, Graphene-Quantum Cascade Laser Coupled-Cavity.ACS photonics · 2020Article
Corrections and comments
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Authors and funding
11 authors at 4 institutions in 2 countries.
Funding
Abstract
The use of fundamental modelocking to generate short terahertz (THz) pulses and THz frequency combs from semiconductor lasers has become a routine affair, using quantum cascade lasers (QCLs) as a gain medium. However, unlike classic laser diodes, no demonstrations of harmonic modelocking, active or passive, have been shown in THz QCLs, where multiple pulses per round trip are generated when the laser is modulated at the harmonics of the cavity's fundamental round-trip frequency. Here, using time-resolved THz techniques, we show for the first time harmonic injection and mode-locking in which THz QCLs are modulated at the harmonics of the round-trip frequency. We demonstrate the generation of the harmonic electrical beatnote within a QCL, its injection locking to an active modulation and its direct translation to harmonic pulse generation using the unique ultrafast nature of our approach. Finally, we show indications of self-starting harmonic emission, i.e., without external modulation, where the QCL operates exclusively on a harmonic (up to its 15th harmonic) of the round-trip frequency. This behaviour is supported by time-resolved simulations of induced gain and loss in the system and shows the importance of the electronic, as well as photonic, nature of QCLs. These results open up the prospect of passive harmonic modelocking and THz pulse generation, as well as the generation of low-noise microwave generation in the hundreds of GHz region.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.