Giant Kerr nonlinearity of terahertz waves mediated by stimulated phonon polaritons in a microcavity chip

Yibo Huang; Yao Lu; Wei Li; Xitan Xu; Xinda Jiang; Ruobin Ma; Lu Chen; Ningjuan Ruan; Qiang Wu; Jingjun Xu

doi:10.1038/s41377-024-01509-y

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Giant Kerr nonlinearity of terahertz waves mediated by stimulated phonon polaritons in a microcavity chip

Original Articles

- Giant Kerr nonlinearity of terahertz waves mediated by stimulated phonon polaritons in a microcavity chip
- Light: Science & Applications Vol. 13, Issue 10, Pages: 2231-2239(2024)
- Affiliations：
  
  1.The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300071, China
  2.Shenzhen Research Institute of Nankai University, Shenzhen 518083 Guangdong, China
  3.Beijing Institute of Space Mechanics & Electricity, China Academy of Space Technology, 100094 Beijing, China
- Author bio：
  
  Yao Lu (yaolu@nankai.edu.cn)
  Qiang Wu (wuqiang@nankai.edu.cn)
  Jingjun Xu (jjxu@nankai.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01509-y
  CLC：
- Received：06 December 2023，
  
  Revised：07 June 2024，
  
  Accepted：2024-06-25，
  
  Published Online：23 August 2024，
  
  Published：31 October 2024
- Accepted：
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Huang, Y. B. et al. Giant Kerr nonlinearity of terahertz waves mediated by stimulated phonon polaritons in a microcavity chip. Light: Science & Applications, 13, 2231-2239 (2024).
DOI：

Huang, Y. B. et al. Giant Kerr nonlinearity of terahertz waves mediated by stimulated phonon polaritons in a microcavity chip. Light: Science & Applications, 13, 2231-2239 (2024). DOI： 10.1038/s41377-024-01509-y.

摘要

Abstract

Optical Kerr effect

in which input light intensity linearly alters the refractive index

has enabled the generation of optical solitons

supercontinuum spectra

and frequency combs

playing vital roles in the on-chip devices

fiber communications

and quantum manipulations. Especially

terahertz Kerr effect

featuring fascinating prospects in future high-rate computing

artificial intelligence

and cloud-based technologies

encounters a great challenge due to the rather low power density and feeble Kerr response. Here

we demonstrate a giant terahertz frequency Kerr nonlinearity mediated by stimulated phonon polaritons. Under the influences of the giant Kerr nonlinearity

the power-dependent refractive index change would result in a frequency shift in the microcavity

which was experimentally demonstrated via the measurement of the resonant mode of a chip-scale lithium niobate Fabry-Pérot microcavity. Attributed to the existence of stimulated phonon polaritons

the nonlinear coefficient extracted from the frequency shifts is orders of magnitude larger than that of visible and infrared light

which is also theoretically demonstrated by nonlinear Huang equations. This work opens an avenue for many rich and fruitful terahertz Kerr effect based physical

chemical

and biological systems that have terahertz fingerprints.

关键词

Keywords

references

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