Light-induced photoluminescence switching using liquid crystal-dispersed quantum dots

Min Chi Cheng; Chih Chien Chu; Yu Chuan Su; Wei Ting Chang; Vincent K.S. Hsiao; Ken Tye Yong; Wing Cheung Law; Paras N. Prasad

doi:10.1109/JPHOT.2011.2179289

Light-induced photoluminescence switching using liquid crystal-dispersed quantum dots

Min Chi Cheng
, Chih Chien Chu
, Yu Chuan Su
, Wei Ting Chang
, Vincent K.S. Hsiao
, Ken Tye Yong
, Wing Cheung Law
, Paras N. Prasad

Chemistry

National Chi Nan University
Chung Shan Medical University
Nanyang Technological University
SUNY Buffalo

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

15 Scopus citations

Abstract

Light-induced photoluminescence (PL) switching using azobenzene-doped liquid crystal (LC)-dispersed quantum dots (QDs) is demonstrated in a format of LC cell and LC-infiltrated tube. Before light irradiation, excitation photons undergo multiple scattering events before emission out of the LC cell, and PL intensity is high. Upon the light irradiation, the trans-to-cis photoisomerization of azobenzene makes the QD-dispersed LCs highly transparent, thus allowing most excitation photons to pass through LCs and decrease PL intensity. This demonstration may allow a new modulating technique for future development of light-switchable, QD-emission-based display or photonic devices.

Original language	English
Article number	4563994
Pages (from-to)	19-25
Number of pages	7
Journal	IEEE Photonics Journal
Volume	4
Issue number	1
DOIs	https://doi.org/10.1109/JPHOT.2011.2179289
State	Published - 2012

Keywords

optical properties of photonic materials
Photonic materials

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10.1109/JPHOT.2011.2179289

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title = "Light-induced photoluminescence switching using liquid crystal-dispersed quantum dots",

abstract = "Light-induced photoluminescence (PL) switching using azobenzene-doped liquid crystal (LC)-dispersed quantum dots (QDs) is demonstrated in a format of LC cell and LC-infiltrated tube. Before light irradiation, excitation photons undergo multiple scattering events before emission out of the LC cell, and PL intensity is high. Upon the light irradiation, the trans-to-cis photoisomerization of azobenzene makes the QD-dispersed LCs highly transparent, thus allowing most excitation photons to pass through LCs and decrease PL intensity. This demonstration may allow a new modulating technique for future development of light-switchable, QD-emission-based display or photonic devices.",

keywords = "optical properties of photonic materials, Photonic materials",

author = "Cheng, \{Min Chi\} and Chu, \{Chih Chien\} and Su, \{Yu Chuan\} and Chang, \{Wei Ting\} and Hsiao, \{Vincent K.S.\} and Yong, \{Ken Tye\} and Law, \{Wing Cheung\} and Prasad, \{Paras N.\}",

year = "2012",

doi = "10.1109/JPHOT.2011.2179289",

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T1 - Light-induced photoluminescence switching using liquid crystal-dispersed quantum dots

AU - Cheng, Min Chi

AU - Chu, Chih Chien

AU - Su, Yu Chuan

AU - Chang, Wei Ting

AU - Hsiao, Vincent K.S.

AU - Yong, Ken Tye

AU - Law, Wing Cheung

AU - Prasad, Paras N.

PY - 2012

Y1 - 2012

N2 - Light-induced photoluminescence (PL) switching using azobenzene-doped liquid crystal (LC)-dispersed quantum dots (QDs) is demonstrated in a format of LC cell and LC-infiltrated tube. Before light irradiation, excitation photons undergo multiple scattering events before emission out of the LC cell, and PL intensity is high. Upon the light irradiation, the trans-to-cis photoisomerization of azobenzene makes the QD-dispersed LCs highly transparent, thus allowing most excitation photons to pass through LCs and decrease PL intensity. This demonstration may allow a new modulating technique for future development of light-switchable, QD-emission-based display or photonic devices.

AB - Light-induced photoluminescence (PL) switching using azobenzene-doped liquid crystal (LC)-dispersed quantum dots (QDs) is demonstrated in a format of LC cell and LC-infiltrated tube. Before light irradiation, excitation photons undergo multiple scattering events before emission out of the LC cell, and PL intensity is high. Upon the light irradiation, the trans-to-cis photoisomerization of azobenzene makes the QD-dispersed LCs highly transparent, thus allowing most excitation photons to pass through LCs and decrease PL intensity. This demonstration may allow a new modulating technique for future development of light-switchable, QD-emission-based display or photonic devices.

KW - optical properties of photonic materials

KW - Photonic materials

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M3 - Article

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JO - IEEE Photonics Journal

JF - IEEE Photonics Journal

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M1 - 4563994

ER -

Light-induced photoluminescence switching using liquid crystal-dispersed quantum dots

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Keywords

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