Abstract

In this paper, we propose an infrared light shutter device using cholesteric liquid crystals. The pitch of the device corresponds to the wavelengths of the infrared region with a strong thermal effect. This device is intended for use as a smart window to maintain an optimal indoor temperature by controlling the infrared radiation coming from the sun. The proposed cholesteric device switches between the planar state and the isotropic state by controlling the temperature using an electrically heated transparent electrode made of indium tin oxide. A window with a planar state that reflects infrared radiation would be used mainly in the summer, while the isotropic state that transmits infrared would be applied in the winter. The proposed device produced a variety of gray levels of transmittance based on the temperature, and thus it can provide the proper temperature for each user. The easy fabrication process gives it appeal as a functional device in the smart window market, and it compares favorably with previous light shutter devices. The infrared shutter is expected to be useful for next-generation window applications.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
Light shutter using dichroic-dye-doped long-pitch cholesteric liquid crystals

Byeong-Hun Yu, Jae-Won Huh, Ki-Han Kim, and Tae-Hoon Yoon
Opt. Express 21(24) 29332-29337 (2013)

Advanced bistable cholesteric light shutter with dual frequency nematic liquid crystal

Pankaj Kumar, Shin-Woong Kang, and Seung Hee Lee
Opt. Mater. Express 2(8) 1121-1134 (2012)

Double-layered light shutter using long-pitch cholesteric liquid crystal cells

Jae-Won Huh, Byeong-Hun Yu, Joon Heo, and Tae-Hoon Yoon
Appl. Opt. 54(12) 3792-3795 (2015)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription