ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2022
Self-Induced Phase Locking of Terahertz Frequency Combs in a Phase-Sensitive Hyperspectral Near-Field Nanoscope.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Aspects of cavity engineering in THz quantum cascade laser frequency combs.Nanophotonics (Berlin, Germany) · 2025Article
- Branch Waveguide Couplers with a frequency of 510 GHz for Terahertz Transmit/Receive Isolation Applications.Micromachines · 2024Article
- Terahertz near-field microscopy of metallic circular split ring resonators with graphene in the gap.Scientific reports · 2024Article
- Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy.Light, science & applications · 2024Article
- Compact terahertz harmonic generation in the Reststrahlenband using a graphene-embedded metallic split ring resonator array.Nature communications · 2024Article
- Terahertz nanospectroscopy of plasmon polaritons for the evaluation of doping in quantum devices.Nanophotonics (Berlin, Germany) · 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
- Self-Induced Phase Locking of Terahertz Frequency Combs in a Phase-Sensitive Hyperspectral Near-Field Nanoscope.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Article
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7 authors.
Funding
Abstract
Chip-scale, electrically-pumped terahertz (THz) frequency-combs (FCs) rely on nonlinear four-wave-mixing processes, and have a nontrivial phase relationship between the evenly spaced set of emitted modes. Simultaneous monitoring and manipulation of the intermode phase coherence, without any external seeding or active modulation, is a very demanding task for which there has hitherto been no technological solution. Here, a self-mixing intermode-beatnote spectroscopy system is demonstrated, based on THz quantum cascade laser FCs, in which light is back-scattered from the tip of a scanning near-field optical-microscope (SNOM) and the intracavity reinjection monitored. This enables to exploit the sensitivity of FC phase-coherence to optical feedback and, for the first time, manipulate the amplitude, linewidth and frequency of the intermode THz FC beatnote using the feedback itself. Stable phase-locked regimes are used to construct a FC-based hyperspectral, THz s-SNOM nanoscope. This nanoscope provides 160 nm spatial resolution, coherent detection of multiple phase-locked modes, and mapping of the THz optical response of nanoscale materials up to 3.5 THz, with noise-equivalent-power (NEP) ≈400 pW √Hz
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