Ren, Fang-Fang; Ang, Kah-Wee; Yu, M.B.; Lo, G.Q.; Shi, Yi
We exploit the idea of split bull's eye antenna for a nanometer-scale germanium photodetector operating at a standard communication wavelength of 1310 nm. The nontraditional plasmonic metal aluminum has been implemented in the resonant antenna structure fabricated by standard CMOS processing. A significant enhancement in photoresponse is achieved in split bull's eye scheme due to an increased optical near-field in the active region.
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