Optical Control of High-Harmonic Generation at the Atomic Thickness

Yadong Wang, Fadil Iyikanat, Xueyin Bai, Xuerong Hu, Susobhan Das, Yunyun Dai, Yi Zhang, Luojun Du, Shisheng Li, Harri Lipsanen, F. Javier García De Abajo, Zhipei Sun

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

High-harmonic generation (HHG), an extreme nonlinear optical phenomenon beyond the perturbation regime, is of great significance for various potential applications, such as high-energy ultrashort pulse generation with outstanding spatiotemporal coherence. However, efficient active control of HHG is still challenging due to the weak light–matter interaction displayed by currently known materials. Here, we demonstrate optically controlled HHG in monolayer semiconductors via the engineering of interband polarization. We find that HHG can be efficiently controlled in the excitonic spectral region with modulation depths up to 95% and ultrafast response speeds of several picoseconds. Quantitative time-domain theory of the nonlinear optical susceptibilities in monolayer semiconductors further corroborates these experimental observations. Our demonstration not only offers an in-depth understanding of HHG but also provides an effective approach toward active optical devices for strong-field physics and extreme nonlinear optics.
Original languageEnglish
Pages (from-to)8455-8462
Number of pages8
JournalNano Letters
Volume22
Issue number21
DOIs
Publication statusPublished - 9 Nov 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • All-Optical Control
  • Static High-Harmonic Generation
  • Transient High-Harmonic Generation
  • Interband Carrier Transition
  • Electronic States
  • Real-Time Quantitative Theory of Nonlinear Optics

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