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

Kobashi, Junji; Yoshida, Hiroyuki; Ozaki, Masanori

Scientific Reports, 2017, 7, 16470-16470

Number of Access:477（2025-09-02 10:25 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/75696

Link to primary information 

File Format Terms of use Size Views Date.Available Description information
sr_07_16470 pdf None 1.84 MB 200 2020.04.27  
Creative Commons : Attribution

Item Information

Output File Export EndNote Basic Export Mendeley

Title
Circularly-polarized, semitransparent and double-sided holograms based on helical photonic structures
Creator
CreatorName
Kobashi, Junji
NRID
1000080550045 1000080550045
researchmap permalink
hiroyukiyoshida hiroyukiyoshida
Scopus Author ID
55628543086 55628543086
CreatorName
Yoshida, Hiroyuki
NRID
1000050204186 1000050204186
ORCID
0000-0002-9556-4225 0000-0002-9556-4225
researchmap permalink
read0014092 read0014092
Scopus Author ID
55490143900 55490143900
CreatorName
Ozaki, Masanori
Abstract
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.
Publisher
Nature Research
Source Title
Scientific Reports
Volume (Issue)
7
Page
16470-16470
Date of Issued
2017-11-28
Language
English
Handle URL
https://hdl.handle.net/11094/75696
eISSN
20452322
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1038/s41598-017-16517-9
Access Rights
open access
CopyRight
© 2017 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article