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Impedance effect of manganite thin film-based photodetectors
  • 时间：0
  • 分类：O484[理学—固体物理;理学—物理]
  • 作者机构：[1]Department of Mathematics and Physics, China University of Petroleum, Beijing 102249, China, [2]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China, [3]International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China
  • 相关基金：Supported by the National Natural Science Foundation of China （Grant Nos. 50672132, 60576015 and 60778034） and the Key Project of the Ministry of Education of China （Grant No. 107020）
  • 相关项目：在Si基底上外延生长钙钛矿氧化物薄膜和多层膜研究
关键词： 水锰矿, 光电探测器, 薄膜, 阻抗效应, manganite, photodetector, thin film, impedance effect
中文摘要：

我们在倾斜的 SrTiO3 (001 ) 底层上基于 perovskite 水锰矿 La0.67Ca0.33MnO3 薄电影在光电探测器结构上报导。光电的效果被 308 nm 响应刺激观察了在在房间温度的 20 ns 的持续时间的紫外激光脉搏照耀。获得的产量没要求扩大。到信号的变丑检测了的还原剂，一系列严峻的大小被做调查阻抗效果。当在示波器结束的阻抗匹配到合作轴电报时，信号踪迹几乎三角形、对称，与等于刺激激光的反应时间。在 addation，反应线性地为低在样品上精力取决于照耀的区域。在不偏的条件下面并且那么好的设备工作简单为实际应用设置。

英文摘要：

We report on the photodetector structures based on perovskite manganite La0.67Ca0.33MnO3 thin films on tilted SrTiO3 （001） substrates. The photovoltaic effect has been observed in response to excitation by 308 nm ultraviolet laser pulse irradiation in duration of 20 ns at room temperature. The outputs obtained required no amplification. To reduce the deformation of the signal detected, a series of testing measurements were made to investigate the impedance effect. When the impedance at the oscilloscope end matched to the co-axis cable, the signal trace was almost triangular and symmetrical, with response time equal to the excitation laser. In addation, the response linearly depends on the irradiated area for low on-sample energy. The devices work well under unbiased conditions and so are simple to configure for practical applications.

同期刊论文项目
在Si基底上外延生长钙钛矿氧化物薄膜和多层膜研究
期刊论文 18
钙钛矿氧化物薄膜及其异质结的超快光电效应研究
期刊论文 37
基于钙钛矿氧化物单晶的快速响应紫外光探测器基础研究
期刊论文 43 获奖 2
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