TRANSIT-TIME LIMITED RESPONSE OF GAAS METAL-SEMICONDUCTOR-METAL PHOTODIODES

被引:29
作者
KLINGENSTEIN, M [1 ]
KUHL, J [1 ]
ROSENZWEIG, J [1 ]
MOGLESTUE, C [1 ]
AXMANN, A [1 ]
机构
[1] FRAUNHOFER INST APPL SOLID STATE PHYS,W-7800 FREIBURG,GERMANY
关键词
D O I
10.1063/1.104857
中图分类号
O59 [应用物理学];
学科分类号
摘要
The response of GaAs metal-semiconductor-metal (MSM) photodiodes at low temperatures has been investigated in the time domain by photoconductive sampling. The dependence of the response time on temperature for T > 50 K can be described by phonon mediated intervalley and intravalley scattering. The pulse width drops from 10.8 ps at 300 K to 5.6 ps at 70 K and then grows rapidly with decreasing temperature below 50 K. These results demonstrate that the response is limited by the electron/hole transport in the semiconductor rather than by external capacitances or inductances.
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页码:2503 / 2505
页数:3
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