Kanghee Lee, Jaehyeon Son, Byungsoo Kang, Jagang Park, Fabian Rotermund, Bumki Min
http://ieeexplore.ieee.org/document/8067111/
We experimentally demonstrate linear frequency conversion on time-variant terahertz (THz) metasurface. The proposed metasurface is originally designed to have two resonances, and with optical pumping, the resonances are merged into one. When a THz pulse passes through the metasurface during this merging process, a frequency component corresponding to the merged mode is generated.
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