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Electrically tunable room-temperature 2π liquid crystal terahertz phase shifter

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5 Author(s)
Hsin-Ying Wu ; Dept. of Electrophys., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Hsieh, Cho-Fan ; Tsung-Ta Tang ; Ru-Pin Pan
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Tunable phase shift up to 360° at 1 THz is demonstrated using electrically controlled birefringence in a vertically aligned nematic liquid crystal (E7) cell, 1.83 mm in thickness. The driving voltage and corresponding field required for a phase shift of 360° at 1 THz are 100 V and 90.5 V/cm, respectively.

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 14 )