Numerical analysis of artificial optical activities of planar chiral nano-gratings

Yasuo Ohtera

doi:10.1587/transele.E97.C.33

Numerical analysis of artificial optical activities of planar chiral nano-gratings

Yasuo Ohtera

工学研究科・通信工学専攻

研究成果: Article › 査読

2 被引用数 (Scopus)

抄録

We analyzed polarization characteristics of gammadionshaped planar chiral nano-gratings (PCNGs), using Jonesmatrix and FDTD simulation. Optical activity (OA) was found to take place at wavelengths where long-lifetime modes appeared in the chiral layer. Among two kinds of resonance phenomena that concern the extension of the lifetime, guidedmode resonance and Fabry-Perot resonance, the latter was found to be a key to generate practically-important, broad peaks in the OA spectrum. Through the calculation of dispersion relations of Bloch modes in the chiral layer, we showed that the interference of multiple modes with group velocity dispersion played a critical role in the generation of such long-lifetime modes.

本文言語	English
ページ（範囲）	33-39
ページ数	7
ジャーナル	IEICE Transactions on Electronics
巻	E97-C
号	1
DOI	https://doi.org/10.1587/transele.E97.C.33
出版ステータス	Published - 2014 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

文献へのアクセス

10.1587/transele.E97.C.33

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引用スタイル

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abstract = "We analyzed polarization characteristics of gammadionshaped planar chiral nano-gratings (PCNGs), using Jonesmatrix and FDTD simulation. Optical activity (OA) was found to take place at wavelengths where long-lifetime modes appeared in the chiral layer. Among two kinds of resonance phenomena that concern the extension of the lifetime, guidedmode resonance and Fabry-Perot resonance, the latter was found to be a key to generate practically-important, broad peaks in the OA spectrum. Through the calculation of dispersion relations of Bloch modes in the chiral layer, we showed that the interference of multiple modes with group velocity dispersion played a critical role in the generation of such long-lifetime modes.",

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AB - We analyzed polarization characteristics of gammadionshaped planar chiral nano-gratings (PCNGs), using Jonesmatrix and FDTD simulation. Optical activity (OA) was found to take place at wavelengths where long-lifetime modes appeared in the chiral layer. Among two kinds of resonance phenomena that concern the extension of the lifetime, guidedmode resonance and Fabry-Perot resonance, the latter was found to be a key to generate practically-important, broad peaks in the OA spectrum. Through the calculation of dispersion relations of Bloch modes in the chiral layer, we showed that the interference of multiple modes with group velocity dispersion played a critical role in the generation of such long-lifetime modes.

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KW - Photonic band structure

KW - Sub-wavelength grating

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