Concentration Dependence of Relaxation Time of Polarization Fluctuation in Mixed Crystals KDP1-xDKDPx
Concentration Dependence of Relaxation Time of Polarization Fluctuation in Mixed Crystals KDP1-xDKDPx
复制标题
混合晶体 KDP1-xDKDPx 中偏振涨落弛豫时间的浓度依赖性
DOI：
10.1143/jpsj.50.551
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发表时间：
1981
影响因子：
1.7
通讯作者：
I. Tatsuzaki
中科院分区：
文献类型：
--
作者：
M. Kasahara;I. Tatsuzaki
在x =0.04, 0.08, 0.23时，测量了混合晶体KDP 1- x DKDP x几何形状x (y, x) y的布里渊散射光谱。0.46和0.72。光谱由极化波动和声子峰组成。在极化波动为德拜型的假设下，通过将计算谱与极化波动-声子耦合系统的实验谱拟合来计算单个偶极子的弛豫时间。弛豫时间从x =0.04时的0.19 ×10 -12秒增加到x =0.72时的1.03 ×10 -12秒。
Brillouin scattering spectra in the geometry x ( y , x ) y were measured in mixed crystals KDP 1- x DKDP x for x =0.04, 0.08, 0.23. 0.46 and 0.72. A spectrum consists of a broad component owing to polarization fluctuation and a phonon peak. On the assumption that polarization fluctuation is of Debye type, a relaxation time of an individual dipole is evaluated by fitting the calculated spectrum to an experimental one in a polarization fluctuation-acoustic phonon coupling system. The relaxation time increases from 0.19 ×10 -12 sec at x =0.04 to 1.03 ×10 -12 sec at x =0.72.