Journal
JOURNAL OF OPTICS
Volume 13, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/13/10/105501
Keywords
near-SLN:Ce; THz photorefraction; domain reversal
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Funding
- National Natural Science Foundation of China [10974063]
- Research Foundation of Wuhan National Laboratory [P080008]
- National '973' Project [2007CB310403]
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The dielectric properties of near-stoichiometric LiNbO3:Ce (near-SLN:Ce) single crystal have been investigated by using terahertz time domain spectroscopy (THz-TDS) in a frequency range of 0.7-1.6 THz at room temperature. When coupled with an applied external optical field, a photorefractive effect was observed, resulting in the modulation of the complex dielectric constant for near-SLN:Ce. The variation of the refractive index vertical bar Delta n vertical bar has a linear relationship in scale with the applied light intensity accompanied with an abrupt decrease. These findings were attributed to the internal space charge field of photorefraction and the light-induced domain reversal in the crystal.
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