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High optical performance and practicality of active plasmonic devices based on rhombohedral BiFeO 3
Author(s) -
Chu S.H.,
Singh D.J.,
Wang J.,
Li E.P.,
Ong K.P.
Publication year - 2012
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201280022
Subject(s) - materials science , plasmon , ferroelectricity , multiferroics , polarization (electrochemistry) , optoelectronics , nanophotonics , antiferromagnetism , optical communication , optical switch , modulation (music) , condensed matter physics , physics , chemistry , dielectric , acoustics
First principles calculations of electronic and optical properties of multiferroic oxide BiFeO 3 are used in combination with a plasmonic device model of optical switch to show that a BiFeO 3 based device can have much better performance than devices based on existing materials. This arises from the combination of octahedral tilts, ferroelectricity and G‐type antiferromagnetism in BiFeO 3 leading to a strong dependence of the optical refractive indices on the orientation with respect to the polarization. A prototype of a plasmonic resonator with an R‐BFO thin film layer is used as an example and shows excellent switch and modulation responses. The proposed approach provides potential opportunities to develop high performance nanophotonic devices for optical communication.