Ultraviolet Sensitive Ultrafast Photovoltaic Effect in Tilted KTaO3 Single Crystals
XING Jie1,2, GUO Er-Jia2, JIN Kui-Juan2, LU Hui-Bin2, HE Meng2, WEN Juan2, YANG Fang2
1School of Materials Sciences and Technology, China University of Geosciences, Beijing 1000832Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
Ultraviolet Sensitive Ultrafast Photovoltaic Effect in Tilted KTaO3 Single Crystals
XING Jie1,2, GUO Er-Jia2, JIN Kui-Juan2, LU Hui-Bin2, HE Meng2, WEN Juan2, YANG Fang2
1School of Materials Sciences and Technology, China University of Geosciences, Beijing 1000832Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
摘要An ultraviolet sensitive ultrafast photovoltaic effect is observed in tilted 10° KTaO3 (KT) single crystals. The rise time of the transient photovoltaic pulse is 497.4 ps and the full width at half maximum is 974.6 ps under irradiation of a 266 nm laser pulse with 25 ps duration. An open-circuit photovoltage sensitivity of 328 mV/mJ and a photocurrent sensitivity of 460 mA/mJ are obtained. The experimental results demonstrate the potential applications of KT single crystals in ultraviolet detection.
Abstract：An ultraviolet sensitive ultrafast photovoltaic effect is observed in tilted 10° KTaO3 (KT) single crystals. The rise time of the transient photovoltaic pulse is 497.4 ps and the full width at half maximum is 974.6 ps under irradiation of a 266 nm laser pulse with 25 ps duration. An open-circuit photovoltage sensitivity of 328 mV/mJ and a photocurrent sensitivity of 460 mA/mJ are obtained. The experimental results demonstrate the potential applications of KT single crystals in ultraviolet detection.
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2010, Vol. 27 
