Tuning the focal point of a plasmonic lens by nematic liquid crystal

A theoretical and numerical investigation of tunable plasmonic nano-optic lens on the basis of liquid crystal are proposed as a new method of active modulating the output beam. The focal length can be controlled easily by exposing plasmonic nano-optic lens to constant external electric field. The ph...

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Bibliographic Details
Published inJournal of the European Optical Society. Rapid publications Vol. 7; p. 12053
Main Authors Bahramipanah, M., Abrishamian, M. S., Mirtaheri, S. A.
Format Journal Article
LanguageEnglish
Published EDP Sciences 01.01.2012
Subjects
anisotropic media
surface plasmons
tunable nano-optic lens
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Summary:A theoretical and numerical investigation of tunable plasmonic nano-optic lens on the basis of liquid crystal are proposed as a new method of active modulating the output beam. The focal length can be controlled easily by exposing plasmonic nano-optic lens to constant external electric field. The physical principle of this phenomenon is evaluated from the phase of Fabry-Perot (F-P) resonance in slits and electro-optical effect of liquid crystal. Our numerical simulations reveal that large tuning range of the focal length up to 725 nm can be achieved. The results in this article provide a potential way to realize tunable plasmonic lens, which can be applied as an efficient element in ultrahigh nano-scale integrated photonic circuits for miniaturization and tuning purposes.
ISSN:1990-2573
1990-2573
DOI:10.2971/jeos.2012.12053