Surface plasmon enhanced THz emission with nanoporous gold-supported CdT
Posted on 10.06.2021 - 21:54
Terahertz emission by ultrafast excitation of semiconductor/metal interfaces was found strongly enhanced by plasmon resonance. Here, we extend metal into three-dimensional nanoporous structure. We investigated the specific impact of surface plasmon in the ultrafast optoelectronic response for THz generation by constructing cadmium telluride (CdTe) on three-dimensional nanoporous gold (NPG) compound structure. By comparing the THz signal emitted from CdTe on silicon and NPG with a 780 nm ultrafast laser pumping, we found that the localized surface plasmon resonance (LSPR) enhances the THz amplitude more than an order of magnitude mainly due to the ‘photo-Dember’ effect caused by LSPR field excited from NPG.
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Huang, Luyi; Zhang, Ling; Zhou, Junjie; Min, Min; Li, Chuang; Li, Chuanqi; et al. (2021): Surface plasmon enhanced THz emission with nanoporous gold-supported CdT. The Optical Society. Collection. https://doi.org/10.6084/m9.figshare.c.5440527.v2
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