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

Research output: Journal article publication › Journal article › Academic research › peer-review

13 Citations (Scopus)

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
Publication status	Published - 9 Jan 2012
Externally published	Yes

Keywords

optical properties of photonic materials
Photonic materials

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

More information

10.1109/JPHOT.2011.2179289

Cite this

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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.",

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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.

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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.

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

Abstract

Keywords

ASJC Scopus subject areas

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