Mode recombination and alternation of surface plasmons in anisotropic mediums

Rui Luo; Ying Gu; Xiankuo Li; Luojia Wang; Iam Choon Khoo; Qihuang Gong

doi:10.1063/1.4773877

Mode recombination and alternation of surface plasmons in anisotropic mediums

Rui Luo, Ying Gu, Xiankuo Li, Luojia Wang, Iam Choon Khoo, Qihuang Gong

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Dispersion relations of surface plasmon polaritons with transverse-magnetic- and transverse-electric-polarized waves coexisting in insulator-metal-anisotropic planar waveguides are analytically derived. Aligned nematic liquid crystal, as an anisotropic medium, is employed to manipulate the mode properties. By varying its optical axis, two kinds of mode transformation are found: one is mode recombination, accompanied by dramatically extended propagation lengths at the cutoff angles, and the other is mode alternation, associated with an obvious shift of the electromagnetic energy flux from one insulator to the other. The results may have applications in actively modulated plasmon-based nanodevices and tunable surface plasmon sources.

Original language	English (US)
Article number	011117
Journal	Applied Physics Letters
Volume	102
Issue number	1
DOIs	https://doi.org/10.1063/1.4773877
State	Published - Jan 7 2013

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4773877

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title = "Mode recombination and alternation of surface plasmons in anisotropic mediums",

abstract = "Dispersion relations of surface plasmon polaritons with transverse-magnetic- and transverse-electric-polarized waves coexisting in insulator-metal-anisotropic planar waveguides are analytically derived. Aligned nematic liquid crystal, as an anisotropic medium, is employed to manipulate the mode properties. By varying its optical axis, two kinds of mode transformation are found: one is mode recombination, accompanied by dramatically extended propagation lengths at the cutoff angles, and the other is mode alternation, associated with an obvious shift of the electromagnetic energy flux from one insulator to the other. The results may have applications in actively modulated plasmon-based nanodevices and tunable surface plasmon sources.",

author = "Rui Luo and Ying Gu and Xiankuo Li and Luojia Wang and Khoo, {Iam Choon} and Qihuang Gong",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China under Grant Nos. 91121018 and 11121091, National Key Basic Research Program of China under Grant No. 2013CB328700, and National Fund for Fostering Talents of Basic Science (NFFTBS) J1030310. Work at Pennsylvania State University was supported by the Air Force Office of Scientific Research.",

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T1 - Mode recombination and alternation of surface plasmons in anisotropic mediums

AU - Luo, Rui

AU - Gu, Ying

AU - Li, Xiankuo

AU - Wang, Luojia

AU - Khoo, Iam Choon

AU - Gong, Qihuang

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China under Grant Nos. 91121018 and 11121091, National Key Basic Research Program of China under Grant No. 2013CB328700, and National Fund for Fostering Talents of Basic Science (NFFTBS) J1030310. Work at Pennsylvania State University was supported by the Air Force Office of Scientific Research.

PY - 2013/1/7

Y1 - 2013/1/7

N2 - Dispersion relations of surface plasmon polaritons with transverse-magnetic- and transverse-electric-polarized waves coexisting in insulator-metal-anisotropic planar waveguides are analytically derived. Aligned nematic liquid crystal, as an anisotropic medium, is employed to manipulate the mode properties. By varying its optical axis, two kinds of mode transformation are found: one is mode recombination, accompanied by dramatically extended propagation lengths at the cutoff angles, and the other is mode alternation, associated with an obvious shift of the electromagnetic energy flux from one insulator to the other. The results may have applications in actively modulated plasmon-based nanodevices and tunable surface plasmon sources.

AB - Dispersion relations of surface plasmon polaritons with transverse-magnetic- and transverse-electric-polarized waves coexisting in insulator-metal-anisotropic planar waveguides are analytically derived. Aligned nematic liquid crystal, as an anisotropic medium, is employed to manipulate the mode properties. By varying its optical axis, two kinds of mode transformation are found: one is mode recombination, accompanied by dramatically extended propagation lengths at the cutoff angles, and the other is mode alternation, associated with an obvious shift of the electromagnetic energy flux from one insulator to the other. The results may have applications in actively modulated plasmon-based nanodevices and tunable surface plasmon sources.

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Mode recombination and alternation of surface plasmons in anisotropic mediums

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