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Ultraviolet photoresponse properties of SrTiO3 single crystals

Published online by Cambridge University Press:  22 February 2007

Y.-H. Huang ,
K. Zhao ,
H.-B. Lu ,
M. He ,
K.-J. Jin ,
Z.-H. Chen ,
Y.-L. Zhou  and
G. Z. Yang
Y.-H. Huang
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
K. Zhao*
Affiliation:
Department of Mathematics and Physics, China University of Petroleum, Beijing 102249, P.R. China International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, P.R. China
H.-B. Lu
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
M. He
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
K.-J. Jin
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Z.-H. Chen
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Y.-L. Zhou
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
G. Z. Yang
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
*
zhk@cup.edu.cnhblu@aphy.iphy.ac.cn
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Abstract

We have observed ultraviolet photosensitive properties of SrTiO3 single crystals. The photoresponse signal reaches 7.6 mV under a bias voltage of 110 V and an on-sample energy of 250 nJ for a 15-ps-duration 355 nm laser pulse. A linear relationship is obtained to the peak signal as a function of bias without any saturation trend from 1 to 110 V. Ultrafast characteristic as a function of time was also presented with the rise time as short as 750 ps. Furthermore, a weak photoresponse was detected with a large bias of 2.5 kV under a 420-nm-wavelength laser pulse due to band edge tilting, and drop three orders of magnitude than that under the 355 nm laser pulse, indicating the setup consisting of SrTiO3 single crystal is suitable for detecting ultraviolet radiation.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 38 , Issue 1 , April 2007 , pp. 37 - 39
Copyright
© EDP Sciences, 2007

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