Tunable terahertz wave-plate based on dual-frequency liquid crystal controlled by alternating electric field

Jian Ping Yu; Sai Chen; Fei Fan; Jie Rong Cheng; Shi Tong Xu; Xiang Hui Wang; Sheng Jiang Chang

doi:10.1364/OE.26.000663

Tunable terahertz wave-plate based on dual-frequency liquid crystal controlled by alternating electric field

Jian Ping Yu
, Sai Chen
, Fei Fan^*
, Jie Rong Cheng
, Shi Tong Xu
, Xiang Hui Wang
, Sheng Jiang Chang

^*Corresponding author for this work

Nankai University
Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology

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

38 Scopus citations

Abstract

In this work, the optically anisotropic property of dual-frequency liquid crystals (DFLC) in terahertz (THz) regime has been experimentally investigated, which indicates that the refractive index and birefringence of DFLC can be continuously modulated by both the alternating frequency and intensity of the alternating electric field. This tunability originates from the rotation of DFLC molecules induced by alternating electric fields. The results show that by modulating the alternating frequency from 1 kHz to 100 kHz under 30 kV/m electric field, the 600 μm thickness DFLC cell can play as a tunable quarter-wave plate above 0.68 THz, or a half-wave plate above 1.33 THz. Besides, it can be viewed as a tunable THz phase shifter from 0 to π. Therefore, due to its novel tuning mechanism, DFLC will be of great significance in dynamic manipulating on THz phase and polarization.

Original language	English
Pages (from-to)	663-673
Number of pages	11
Journal	Optics Express
Volume	26
Issue number	2
DOIs	https://doi.org/10.1364/OE.26.000663
State	Published - 22 Jan 2018
Externally published	Yes

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10.1364/OE.26.000663

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title = "Tunable terahertz wave-plate based on dual-frequency liquid crystal controlled by alternating electric field",

abstract = "In this work, the optically anisotropic property of dual-frequency liquid crystals (DFLC) in terahertz (THz) regime has been experimentally investigated, which indicates that the refractive index and birefringence of DFLC can be continuously modulated by both the alternating frequency and intensity of the alternating electric field. This tunability originates from the rotation of DFLC molecules induced by alternating electric fields. The results show that by modulating the alternating frequency from 1 kHz to 100 kHz under 30 kV/m electric field, the 600 μm thickness DFLC cell can play as a tunable quarter-wave plate above 0.68 THz, or a half-wave plate above 1.33 THz. Besides, it can be viewed as a tunable THz phase shifter from 0 to π. Therefore, due to its novel tuning mechanism, DFLC will be of great significance in dynamic manipulating on THz phase and polarization.",

author = "Yu, \{Jian Ping\} and Sai Chen and Fei Fan and Cheng, \{Jie Rong\} and Xu, \{Shi Tong\} and Wang, \{Xiang Hui\} and Chang, \{Sheng Jiang\}",

note = "Publisher Copyright: {\textcopyright} 2018 Optical Society of America.",

year = "2018",

month = jan,

day = "22",

doi = "10.1364/OE.26.000663",

language = "英语",

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journal = "Optics Express",

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}

TY - JOUR

T1 - Tunable terahertz wave-plate based on dual-frequency liquid crystal controlled by alternating electric field

AU - Yu, Jian Ping

AU - Chen, Sai

AU - Fan, Fei

AU - Cheng, Jie Rong

AU - Xu, Shi Tong

AU - Wang, Xiang Hui

AU - Chang, Sheng Jiang

PY - 2018/1/22

Y1 - 2018/1/22

N2 - In this work, the optically anisotropic property of dual-frequency liquid crystals (DFLC) in terahertz (THz) regime has been experimentally investigated, which indicates that the refractive index and birefringence of DFLC can be continuously modulated by both the alternating frequency and intensity of the alternating electric field. This tunability originates from the rotation of DFLC molecules induced by alternating electric fields. The results show that by modulating the alternating frequency from 1 kHz to 100 kHz under 30 kV/m electric field, the 600 μm thickness DFLC cell can play as a tunable quarter-wave plate above 0.68 THz, or a half-wave plate above 1.33 THz. Besides, it can be viewed as a tunable THz phase shifter from 0 to π. Therefore, due to its novel tuning mechanism, DFLC will be of great significance in dynamic manipulating on THz phase and polarization.

AB - In this work, the optically anisotropic property of dual-frequency liquid crystals (DFLC) in terahertz (THz) regime has been experimentally investigated, which indicates that the refractive index and birefringence of DFLC can be continuously modulated by both the alternating frequency and intensity of the alternating electric field. This tunability originates from the rotation of DFLC molecules induced by alternating electric fields. The results show that by modulating the alternating frequency from 1 kHz to 100 kHz under 30 kV/m electric field, the 600 μm thickness DFLC cell can play as a tunable quarter-wave plate above 0.68 THz, or a half-wave plate above 1.33 THz. Besides, it can be viewed as a tunable THz phase shifter from 0 to π. Therefore, due to its novel tuning mechanism, DFLC will be of great significance in dynamic manipulating on THz phase and polarization.

UR - https://www.scopus.com/pages/publications/85041011894

U2 - 10.1364/OE.26.000663

DO - 10.1364/OE.26.000663

M3 - 文章

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AN - SCOPUS:85041011894

SN - 1094-4087

VL - 26

SP - 663

EP - 673

JO - Optics Express

JF - Optics Express

IS - 2

ER -

Tunable terahertz wave-plate based on dual-frequency liquid crystal controlled by alternating electric field

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