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Low‐Power and High‐Contrast Nanoscale All‐Optical Diodes Via Nanocomposite Photonic Crystal Microcavities
Author(s) -
Hu Xiaoyong,
Li Zhiqiang,
Zhang Jiaxiang,
Yang Hong,
Gong Qihuang,
Zhang Xinping
Publication year - 2011
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201002445
Subject(s) - materials science , optoelectronics , diode , plasmon , nanoscopic scale , photonics , photonic crystal , surface plasmon resonance , nanocomposite , optics , resonance (particle physics) , transmission (telecommunications) , surface plasmon , nanoparticle , nanotechnology , physics , particle physics , engineering , electrical engineering
A novel nanoscale integrated all‐optical diode is reported, realized by combining the strong plasmonic responses of gold nanoparticles with the all‐optical tunable properties of polymeric photonic crystal microcavities. Non‐reciprocal transmission properties are achieved based on the effect of surface‐plasmon resonance enhancing the optical non‐linearity and dynamic coupling of asymmetrical microcavity modes. An ultralow‐threshold photon intensity of 2.1 MW cm −2 and an ultrahigh transmission contrast over 10 4 are realized simultaneously. Compared with previously reported all‐optical diodes, the operating power is reduced by five orders of magnitude, while the transmission contrast is enlarged by three orders of magnitude.