Circularly-polarized, semitransparent and double-sided holograms based on helical photonic structures

Kobashi, Junji; Yoshida, Hiroyuki; Ozaki, Masanori

Scientific Reports, 2017, 7, 16470-16470

アクセス数:501件（2025-10-18 08:26 集計）

固定URL: https://hdl.handle.net/11094/75696

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タイトル
Circularly-polarized, semitransparent and double-sided holograms based on helical photonic structures
著者
著者名
Kobashi, Junji
NRID
1000080550045 1000080550045
researchmap permalink
hiroyukiyoshida hiroyukiyoshida
Scopus Author ID
55628543086 55628543086
著者名
Yoshida, Hiroyuki
NRID
1000050204186 1000050204186
ORCID
0000-0002-9556-4225 0000-0002-9556-4225
researchmap permalink
read0014092 read0014092
Scopus Author ID
55490143900 55490143900
著者名
Ozaki, Masanori
抄録
Recent advances in nanofabrication techniques are opening new frontiers in holographic devices, with the capability to integrate various optical functions in a single device. However, while most efficient holograms are achieved in reflection-mode configurations, they are in general opaque because of the reflective substrate that must be used, and therefore, have limited applicability. Here, we present a semi-transparent, reflective computer-generated hologram that is circularly-polarization dependent, and reconstructs different wavefronts when viewed from different sides. The integrated functionality is realized using a single thin-film of liquid crystal with a self-organized helical structure that Bragg reflects circularly-polarized light over a certain band of wavelengths. Asymmetry depending on the viewing side is achieved by exploiting the limited penetration depth of light in the helical structure as well as the nature of liquid crystals to conform to different orientational patterns imprinted on the two substrates sandwiching the material. Also, because the operation wavelength is determined by the reflection band position, pseudo-color holograms can be made by simply stacking layers with different designs. The unique characteristics of this hologram may find applications in polarization-encoded security holograms and see-through holographic signage where different information need to be displayed depending on the viewing direction.
出版者
Nature Research
収録物名
Scientific Reports
巻(号)
7
ページ
16470-16470
刊行年月
2017-11-28
言語
英語
ハンドルURL
https://hdl.handle.net/11094/75696
eISSN
20452322
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1038/s41598-017-16517-9
アクセス権
open access
権利情報
© 2017 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article