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Title: Liquid crystal terahertz phase shifters with functional indium-tin-oxide nanostructures for biasing and alignment

Indium Tin Oxide (ITO) nanowhiskers (NWhs) obliquely evaporated by electron-beam glancing-angle deposition can serve simultaneously as transparent electrodes and alignment layer for liquid crystal (LC) devices in the terahertz (THz) frequency range. To demonstrate, we constructed a THz LC phase shifter with ITO NWhs. Phase shift exceeding π/2 at 1.0 THz was achieved in a ∼517 μm-thick cell. The phase shifter exhibits high transmittance (∼78%). The driving voltage required for quarter-wave operation is as low as 5.66 V (rms), compatible with complementary metal-oxide-semiconductor (CMOS) and thin-film transistor (TFT) technologies.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [6]
  1. Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
  2. (United States)
  3. Taiwan Semiconductor Manufacturing Company, Hsinchu, Taiwan (China)
  4. Department of Electrophysics, National Chiao Tung University, Hsinchu 30078, Taiwan (China)
  5. Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan (China)
  6. (China)
Publication Date:
OSTI Identifier:
22261551
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALIGNMENT; CURIUM OXIDES; ELECTRON BEAMS; INDIUM; LIQUID CRYSTALS; NANOSTRUCTURES; PHASE SHIFT; SEMICONDUCTOR MATERIALS; THIN FILMS; TIN OXIDES; TRANSISTORS