INFLUENCE OF PHOTON-ASSISTED ENERGY-TRANSFER ON THE NONLINEAR REFRACTIVE-INDEX OF GDALO3-CR-3+

被引：7
作者：
GOUVEIA, EA
GUEDES, I
CASTRO, JC
ZILIO, SC
机构：
[1] Instituto de Física e Química de so Carlos, Universidade de so Paulo, 13560, So Carlos, So Paulo
来源：
PHYSICAL REVIEW B | 1992年 / 46卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.46.14387
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have measured the nonlinear refractive index of a GdAlO3:Cr3+ sample as a function of light intensity and wavelength by means of the nearly degenerate two-wave mixing technique and excited-state absorption spectroscopy. It is shown that the main contribution to the nonlinear index is due to a charge-transfer transition around 45 500 cm-1. The imaginary part of n2 is intensity dependent and this peculiar behavior was ascribed to a photon-assisted off-resonance energy transfer between Cr3+ pairs.
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页码：14387 / 14391
页数：5
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