Red, Green, and Blue Reflections Enabled in an Electrically Tunable Helical Superstructure

Yu Cheng Hsiao, Zong Han Yang, Dong Shen, Wei Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Materials with tunable optical properties in the visible spectrum are intriguingly important in science and technology. Such desired tunability can be conveniently accomplished by controlling optical materials with electric field. Now an organic film of self-organized helical superstructure producing electrically tunable reflection of visible light is introduced in this work. The composite is a dual-frequency thermosensitive cholesteric (DFTC) material consisting of a liquid crystal host doped with a binary chiral-dopant mixture including a thermosensitive chiral switch. The red, green, and blue reflections in the DFTC film can be obtained by varying the frequencies of a 45 Vrms applied voltage to induce dielectric heating. The resulting variation in temperature and, in turn, in helical pitch length, enables various wavelengths of reflection to render full-color display in a single film without the need of film stacking. As far as it is known, this is the first work to demonstrate broad electrical tuning of cholesteric reflection in red, green, and blue.

Original languageEnglish
Article number1701128
JournalAdvanced Optical Materials
Volume6
Issue number5
DOIs
Publication statusPublished - Mar 5 2018
Externally publishedYes

Fingerprint

Dielectric heating
Liquid Crystals
Optical materials
optical materials
visible spectrum
Liquid crystals
switches
Optical properties
Tuning
Display devices
liquid crystals
tuning
Switches
Electric fields
Doping (additives)
Color
color
optical properties
Wavelength
heating

Keywords

  • cholesteric liquid crystals
  • dielectric heating effect
  • self-organized helices
  • thermosensitive chiral dopant
  • tunable selective reflection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Red, Green, and Blue Reflections Enabled in an Electrically Tunable Helical Superstructure. / Hsiao, Yu Cheng; Yang, Zong Han; Shen, Dong; Lee, Wei.

In: Advanced Optical Materials, Vol. 6, No. 5, 1701128, 05.03.2018.

Research output: Contribution to journalArticle

@article{db3c17e3f87140cea93edd97a38accb9,
title = "Red, Green, and Blue Reflections Enabled in an Electrically Tunable Helical Superstructure",
abstract = "Materials with tunable optical properties in the visible spectrum are intriguingly important in science and technology. Such desired tunability can be conveniently accomplished by controlling optical materials with electric field. Now an organic film of self-organized helical superstructure producing electrically tunable reflection of visible light is introduced in this work. The composite is a dual-frequency thermosensitive cholesteric (DFTC) material consisting of a liquid crystal host doped with a binary chiral-dopant mixture including a thermosensitive chiral switch. The red, green, and blue reflections in the DFTC film can be obtained by varying the frequencies of a 45 Vrms applied voltage to induce dielectric heating. The resulting variation in temperature and, in turn, in helical pitch length, enables various wavelengths of reflection to render full-color display in a single film without the need of film stacking. As far as it is known, this is the first work to demonstrate broad electrical tuning of cholesteric reflection in red, green, and blue.",
keywords = "cholesteric liquid crystals, dielectric heating effect, self-organized helices, thermosensitive chiral dopant, tunable selective reflection",
author = "Hsiao, {Yu Cheng} and Yang, {Zong Han} and Dong Shen and Wei Lee",
year = "2018",
month = "3",
day = "5",
doi = "10.1002/adom.201701128",
language = "English",
volume = "6",
journal = "Advanced Optical Materials",
issn = "2195-1071",
publisher = "John Wiley and Sons Inc.",
number = "5",

}

TY - JOUR

T1 - Red, Green, and Blue Reflections Enabled in an Electrically Tunable Helical Superstructure

AU - Hsiao, Yu Cheng

AU - Yang, Zong Han

AU - Shen, Dong

AU - Lee, Wei

PY - 2018/3/5

Y1 - 2018/3/5

N2 - Materials with tunable optical properties in the visible spectrum are intriguingly important in science and technology. Such desired tunability can be conveniently accomplished by controlling optical materials with electric field. Now an organic film of self-organized helical superstructure producing electrically tunable reflection of visible light is introduced in this work. The composite is a dual-frequency thermosensitive cholesteric (DFTC) material consisting of a liquid crystal host doped with a binary chiral-dopant mixture including a thermosensitive chiral switch. The red, green, and blue reflections in the DFTC film can be obtained by varying the frequencies of a 45 Vrms applied voltage to induce dielectric heating. The resulting variation in temperature and, in turn, in helical pitch length, enables various wavelengths of reflection to render full-color display in a single film without the need of film stacking. As far as it is known, this is the first work to demonstrate broad electrical tuning of cholesteric reflection in red, green, and blue.

AB - Materials with tunable optical properties in the visible spectrum are intriguingly important in science and technology. Such desired tunability can be conveniently accomplished by controlling optical materials with electric field. Now an organic film of self-organized helical superstructure producing electrically tunable reflection of visible light is introduced in this work. The composite is a dual-frequency thermosensitive cholesteric (DFTC) material consisting of a liquid crystal host doped with a binary chiral-dopant mixture including a thermosensitive chiral switch. The red, green, and blue reflections in the DFTC film can be obtained by varying the frequencies of a 45 Vrms applied voltage to induce dielectric heating. The resulting variation in temperature and, in turn, in helical pitch length, enables various wavelengths of reflection to render full-color display in a single film without the need of film stacking. As far as it is known, this is the first work to demonstrate broad electrical tuning of cholesteric reflection in red, green, and blue.

KW - cholesteric liquid crystals

KW - dielectric heating effect

KW - self-organized helices

KW - thermosensitive chiral dopant

KW - tunable selective reflection

UR - http://www.scopus.com/inward/record.url?scp=85040050827&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040050827&partnerID=8YFLogxK

U2 - 10.1002/adom.201701128

DO - 10.1002/adom.201701128

M3 - Article

AN - SCOPUS:85040050827

VL - 6

JO - Advanced Optical Materials

JF - Advanced Optical Materials

SN - 2195-1071

IS - 5

M1 - 1701128

ER -