ArticleLight, science & applications2025
Second harmonic generation and nonlinear frequency conversion in photonic time-crystals.
Article in Light, science & applications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Electrically Tunable Second-Harmonic Generation in High-Q Organic DAST All-Dielectric Nonlinear Metasurfaces.Nanomaterials (Basel, Switzerland) · 2026Article
- Bidirectional terahertz frequency conversion via structural resonances at a plasma time boundary.Science advances · 2026Article
- Observation of Floquet rotational super-radiance.Nature · 2026Article
- Polarization- and Frequency-Selective Light Amplification in Magneto-Optic Photonic Time Crystals.Nanophotonics (Berlin, Germany) · 2026Article
- Deterministic time rewinding of waves in time-varying media.Nanophotonics (Berlin, Germany) · 2025Article
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We study the nonlinear process of second harmonic generation in photonic time-crystals, materials with refractive index that varies abruptly and periodically in time, and obtain the phase matching condition for this process. We find conditions for which the second harmonic generation is highly enhanced even in the absence of phase matching, governed by the exponential growth of the modes residing in the momentum gap of the photonic time crystal. Additionally, under these conditions, a cascade of higher-order harmonics is generated at growing exponential rates. The process is robust, with no requirement for phase-matching, the presence of a resonance or a threshold, drawing energy from the modulation.
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Registered trials
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