Analysis of terahertz generation via nanostructure enhanced plasmonic excitations

  • Gao Y
  • Chen M
  • Yang C
 et al. 
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In this paper, we conduct a quantitative study on the physical mechanism of electrons dynamics near the nanostructured metal film surfaces, as well as the efficiency of generated terahertz radiation associated with different types of nanostructures. The simulation results show that although the oscillating motion of emitted electrons outside the metal surface may affect the terahertz generation efficiency to some extent, this efficiency is predominantly determined by the electric field magnitude inside the metal film associated with nanostructure enhanced plasmonic excitations. Due to the field enhancement effect of the nanostructure, an appropriately designed nanostructured surface could greatly enhance the strength of generated terahertz signal via the increased nonlinear interactions between the light and the nanostructures.

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  • Yaohui Gao

  • Meng Ku Chen

  • Chia En Yang

  • Yun Ching Chang

  • Stuart Yin

  • Rongqing Hui

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