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Broadband spin‐controlled surface plasmon polariton launching and radiation via L‐shaped optical slot nanoantennas
Author(s) -
Yang Jing,
Zhou Shuxiang,
Hu Chuang,
Zhang Weiwei,
Xiao Xiao,
Zhang Jiasen
Publication year - 2014
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.201300201
Subject(s) - nanophotonics , plasmon , surface plasmon polariton , surface plasmon , optoelectronics , spin (aerodynamics) , optics , radiation , optical radiation , localized surface plasmon , physics , materials science , thermodynamics
Broadband spin‐controlled surface plasmon polariton (SPP) launching and radiation via L‐shaped optical slot nanoantennas are proposed and demonstrated experimentally. The phase retardation and spectra overlapping between two resonant plasmon modes in the L‐shaped optical slot nanoantenna lie at the origin of this effect. SPP launching in two perpendicular directions are controlled by the spin of the incident light. Broadband directional launching of SPPs is achieved and the extinction ratio keeps larger than 7 dB within a wavelength range of 150 nm. Furthermore, the photon spin of SPP radiation via the L‐shaped optical slot nanoantennas is controlled by SPP propagation directions. These investigations provide a route for spin‐controlled nanophotonic applications.