OBSERVATION OF PHOTOREFRACTIVE EFFECT OF KNbO3 CRYSTAL AT μW ILLUMINATION
Li Qi (李旗)ab, Xia Zong-huang (夏宗璜)b, Lu Xi-ting (卢希庭)b, Wang Feng (王锋)c, Gong Qi-huang (龚旗煌)c, Shen De-zhong (沈德忠)d
a State Key Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China; b Department Technical Physics, Peking University, Beijing 100871, China; c Department of Physics, Peking University, Beijing 100871, China; d Research Institute of Synthetic Crystals, Beijing 100018, China
Abstract The photorefractive effects of the as-grown and proton-implanted KNbO3 crystals were studied by two-wave mixing at 62.2μW/cm2 illumination. At this pump power level, the as-grown crystal showed little photorefractive effect, while the proton-implanted crystal showed an obvious effect. Furthermore, there seemed to exist two photorefractive gratings with response times of 22.54 and 1596.30s, at 62.2μW/cm2 pump power level, in the proton-implanted sample. This phenomenon has been attributed to the influence of proton-implantation.
Received: 14 May 2000
Accepted manuscript online:
PACS:
42.65.Hw
(Phase conjugation; photorefractive and Kerr effects)
(Charge carriers: generation, recombination, lifetime, and trapping)
Fund: Project supported by the Chinese Postdoctoral Foundation and by the Laboratory of Heavy-ion Physics Institute, Peking University, China.
Cite this article:
Li Qi (李旗), Xia Zong-huang (夏宗璜), Lu Xi-ting (卢希庭), Wang Feng (王锋), Gong Qi-huang (龚旗煌), Shen De-zhong (沈德忠) OBSERVATION OF PHOTOREFRACTIVE EFFECT OF KNbO3 CRYSTAL AT μW ILLUMINATION 2000 Chinese Physics 9 841
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
