Extraordinary optical absorption through subwavelength slits
作者： Justin S. White , Georgios Veronis , Zongfu Yu , Edward S. Barnard , Anu Chandran
DOI: 10.1364/OL.34.000686
关键词:
摘要: We report on the ability of resonant plasmonic slits to efficiently concentrate electromagnetic energy into a nanoscale volume absorbing material placed inside or directly behind slit. This gives rise extraordinary optical absorption characterized by an enhancement factor that well exceeds enhancements seen for transmission through slits. A semianalytic Fabry-Perot model is developed and shown quantitatively agree with full-field simulations. show nearly 1000% can be realized at 633 nm in aluminum films filled silicon. effect utilized wide range applications, including high-speed photodetectors, lithography recording, biosensors.
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