Abstract

We demonstrate a sensor card with cholesteric liquid crystals (CLCs) for terahertz (THz) waves generated from a nonlinear crystal pumped by a table-top laser. A beam profile of the THz waves is successfully visualized as color change by the sensor card without additional electronic devices, power supplies, and connecting cables. Above the power density of 4.3mW/cm2, the approximate beam diameter of the THz waves is measured using the hue image that is digitalized from the picture of the sensor card. The sensor card is low in cost, portable, and suitable for various situations such as THz imaging and alignment of THz systems.

© 2015 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
3D porous graphene-assisted capsulized cholesteric liquid crystals for terahertz power visualization

Lei Wang, Ruiwen Xiao, Shengxin Yang, Hongsong Qiu, Zhixiong Shen, Peng Lv, Caihong Zhang, Wei Hu, Makoto Nakajima, Biaobing Jin, and Yanqing Lu
Opt. Lett. 45(20) 5892-5895 (2020)

Temperature-dependent chirality of cholesteric liquid crystal for terahertz waves

Xin Zhang, Fei Fan, Yun-Yun Ji, and Sheng-Jiang Chang
Opt. Lett. 45(18) 4988-4991 (2020)

Photoswitchable and dye-doped bubble domain texture of cholesteric liquid crystals

Andrii Varanytsia and Liang-Chy Chien
Opt. Lett. 40(19) 4392-4395 (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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

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