Open AccessEnhancing extraction of light from metal composite structures for plasmonic emitters using light-coupling effect
Author(s) -
NanFu Chiu,
Cheng-Du Yang,
Yi-Lun Kao,
Kuan-Lin Lu
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.009602
Subject(s) - plasmon , materials science , optics , grating , surface plasmon , common emitter , surface plasmon polariton , optoelectronics , coupling (piping) , localized surface plasmon , directivity , extraordinary optical transmission , total internal reflection , rigorous coupled wave analysis , near field optics , near and far field , diffraction grating , physics , optical microscope , scanning electron microscope , telecommunications , computer science , antenna (radio) , metallurgy
This work demonstrates the efficiency and directionality of a method of extracting light from thin-film emissive devices by near-field evanescent waves in plasmonic emitters used in metal composite grating structures. A near-field evanescent wave can induce a surface plasmon wave on the surface of a metal under resonant conditions. Enhancing the near-field evanescent wave generates strong far-field nonlinear optical effects. This effect is highly efficient in some plasmonic emitter structures. Theoretical and experimental results demonstrate that such a metal composite grating structure exhibits good performance, a high coupling ratio, a small coupling angle, enhanced light extraction and a small FWHM. It also improves luminous efficiency, emitter angle, and directivity.
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