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Acta Physica Sinica (Overseas Edition), 1996, Vol. 5(9): 670-676    DOI: 10.1088/1004-423X/5/9/005
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

TWO-WAVE COUPLING IN PHOTOREFRACTIVE TRANSITION METAL DOPED POTASSIUM SODIUM BARIUM STRONTIUM NIOBATE CRYSTALS

ZHU DE-RUI (朱德瑞), ZHANG YUE-LI (张曰理), MO DANG (莫党)
Department of Physics, Zhongshan University, Guangzhou 510275, China
Abstract  Large values of the exponential gain coefficient are obtained ($\varGamma$= 8-20cm-1) in photorefractive potassium sodium barium strontium niobate crystals doped with transition metal elements: Co, Gu, Fe, Cr and Ni by using two-wave coupling experiments with argon ion laser ($\lambda$ = 488nm). The response time is measured to be 60-1000ms at an intensity of 5W/cm2 for various samples. We find that in all the crystals electrons are the dominant photorefractive charge carriers, and the typical density of carriers is 1016-1017 cm-3.
Received:  03 July 1995      Accepted manuscript online: 
PACS:  42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)  
  78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))  
  72.20.Jv (Charge carriers: generation, recombination, lifetime, and trapping)  
  72.80.Sk (Insulators)  
Fund: Project supported in part by the National Natural Science Foundation of China.

Cite this article: 

ZHU DE-RUI (朱德瑞), ZHANG YUE-LI (张曰理), MO DANG (莫党) TWO-WAVE COUPLING IN PHOTOREFRACTIVE TRANSITION METAL DOPED POTASSIUM SODIUM BARIUM STRONTIUM NIOBATE CRYSTALS 1996 Acta Physica Sinica (Overseas Edition) 5 670

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