Terahertz Birefringence in Zinc Oxide

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概要

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• The birefringence of zinc oxide (ZnO) in the terahertz (THz) frequency range is measured using a parallel-polarization configuration THz time-domain spectrometer and compared with the result of an ab initio calculation. The measured birefringence of 0.180 at 1 THz shows good agreement with the calculated value of 0.170 from full phonon consideration, both of which are about 20 times larger than the birefringence in the visible range. It is found that the difference of the transverse optical and longitudinal optical (TO--LO) phonon splitting between the optical phonon branches ($A_{1}$ and $E_{1}$) predominantly contributes to the huge birefringence of ZnO in the THz frequency region.

• 2011-03-25

著者

• Kim Bog

  Department Of Physics Pusan National University

• Yee Dae-Su

  Center for Safety Measurements, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea

• Ahn Jaewook

  Department of Physics, KAIST, Daejeon 305-701, Korea

• Kim Bog

  Department of Physics, Pusan National University, Busan 609-735, Korea

• Kim Youngchan

  Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea

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