Characterization of LiNbO<sub>3</sub> Single-Crystal Substrates Irradiated with Electrons
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概要
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Electron irradiation effects on lithium niobate (LiNbO<sub>3</sub>) single crystals have been investigated by photoacoustic spectroscopy (PAS), Fourier transform infrared (FT-IR) spectroscopy, and Raman scattering spectroscopy. The photoacoustic signal intensity at 750 nm increase with increasing electron electron fluence. The OH- absorption spectra in the IR region are used to examine the defect structure of LiNbO<sub>3</sub>. The absorption spectra are almost the same at electron fluencies below $5 \times 10^{17}$/cm2. We found that the influence of the electron irradiation was different between the mirror-polished side and the as-sliced side, as determined from the Raman spectra. There was no change in the Raman spectra on the mirror-polished LiNbO<sub>3</sub> surface side. The control of the composition is most important to avoid the effects of electron irradiation.
- 2011-07-25
著者
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Miyazaki Hisashi
Department Of Applied Physics Osaka City University
-
Morimoto Jun
Department Of Applied Physics National Defense Academy
-
Toda Kohji
Departmemt Of Electronic Engineering National Defense Academy
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Ohshima Takeshi
Quantum Beam Science Directorate, Japan Atomic Energy Agency, Takasaki, Gunma 370-1292, Japan
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Onoda Shinobu
Quantum Beam Science Directorate, Japan Atomic Energy Agency, Takasaki, Gunma 370-1292, Japan
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