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2007 Volume 24 Issue 2
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SUN Yi-Min, MAO Zong-Liang, HOU Bi-Hui, LIU Guo-Qing, WANG Li. 2007: Giant Birefringence of Lithium Niobate Crystals in the Terahertz Region, Chinese Physics Letters, 24(2): 414-417.
Citation: SUN Yi-Min, MAO Zong-Liang, HOU Bi-Hui, LIU Guo-Qing, WANG Li. 2007: Giant Birefringence of Lithium Niobate Crystals in the Terahertz Region, Chinese Physics Letters, 24(2): 414-417.
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Giant Birefringence of Lithium Niobate Crystals in the Terahertz Region

  • Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080

  • College of Applied Science, Beijing University of Technology, Beijing 100022

  • Available Online: 28/02/2007
  • Fund Project: the National Natural Science Foundation of China under Grant No 10390160
  • Terahertz time-domain spectroscopy (THz-TDS) is used to study the spectral response of lithium niobate crystals (LiNbO3) in the far infrared region. The optical constants are derived from the measured complex refractive index.A giant birefringence is observed in this material, and the average refractive-index difference between the ordinary wave and the extraordinary wave, no - ne, can reach up to about 1.6. Such a large birefringence is attributed to the different phonon modes of A1 (z) and E(x, y). This unusual property makes LiNbO3 a promising material to be used as a functional material in the terahertz region, e.g. Employed as wave-plates and polarization separators.
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Giant Birefringence of Lithium Niobate Crystals in the Terahertz Region

  • Available Online: 28/02/2007

Abstract: Terahertz time-domain spectroscopy (THz-TDS) is used to study the spectral response of lithium niobate crystals (LiNbO3) in the far infrared region. The optical constants are derived from the measured complex refractive index.A giant birefringence is observed in this material, and the average refractive-index difference between the ordinary wave and the extraordinary wave, no - ne, can reach up to about 1.6. Such a large birefringence is attributed to the different phonon modes of A1 (z) and E(x, y). This unusual property makes LiNbO3 a promising material to be used as a functional material in the terahertz region, e.g. Employed as wave-plates and polarization separators.

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