• 文献标题:   Graphene/liquid crystal based terahertz phase shifters
  • 文献类型:   Article
  • 作  者:   WU Y, RUAN XZ, CHEN CH, SHIN YJ, LEE Y, NIU J, LIU JB, CHEN YF, YANG KL, ZHANG XH, AHN JH, YANG H
  • 作者关键词:  
  • 出版物名称:   OPTICS EXPRESS
  • ISSN:   1094-4087
  • 通讯作者地址:   Natl Univ Singapore
  • 被引频次:   50
  • DOI:   10.1364/OE.21.021395
  • 出版年:   2013

▎ 摘  要

Due to its high electrical conductivity and excellent transmittance at terahertz frequencies, graphene is a promising candidate as transparent electrodes for terahertz devices. We demonstrate a liquid crystal based terahertz phase shifter with the graphene films as transparent electrodes. The maximum phase shift is 10.8 degree and the saturation voltage is 5 V with a 50 mu m liquid crystal cell. The transmittance at terahertz frequencies and electrical conductivity depending on the number of graphene layer are also investigated. The proposed phase shifter provides a continuous tunability, fully electrical controllability, and low DC voltage operation. (C) 2013 Optical Society of America