ArticleACS photonics2021
Giant All-Optical Modulation of Second-Harmonic Generation Mediated by Dark Excitons.
Article in ACS photonics, 2021. 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.
- Second harmonic generation at a time-varying interface.Nature communications · 2024Article
- Ultrafast Opto-Electronic and Thermal Tuning of Third-Harmonic Generation in a Graphene Field Effect Transistor.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024Article
- Optical Second Harmonic Generation of Low-Dimensional Semiconductor Materials.Nanomaterials (Basel, Switzerland) · 2024Review
- All-optical generation of static electric field in a single metal-semiconductor nanoantenna.Light, science & applications · 2023Article
- Evolutionary design of two-dimensional material Fabry-Perot structures for enhanced second harmonic generation.Nanophotonics (Berlin, Germany) · 2023Article
- Optical Control of High-Harmonic Generation at the Atomic Thickness.Nano letters · 2022Article
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Authors and funding
21 authors.
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Abstract
All-optical control of nonlinear photonic processes in nanomaterials is of significant interest from a fundamental viewpoint and with regard to applications ranging from ultrafast data processing to spectroscopy and quantum technology. However, these applications rely on a high degree of control over the nonlinear response, which still remains elusive. Here, we demonstrate giant and broadband all-optical ultrafast modulation of second-harmonic generation (SHG) in monolayer transition-metal dichalcogenides mediated by the modified excitonic oscillation strength produced upon optical pumping. We reveal a dominant role of dark excitons to enhance SHG by up to a factor of ∼386 at room temperature, 2 orders of magnitude larger than the current state-of-the-art all-optical modulation results. The amplitude and sign of the observed SHG modulation can be adjusted over a broad spectral range spanning a few electronvolts with ultrafast response down to the sub-picosecond scale via different carrier dynamics. Our results not only introduce an efficient method to study intriguing exciton dynamics, but also reveal a new mechanism involving dark excitons to regulate all-optical nonlinear photonics.
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Registered trials
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