FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Peculiar Transmission Characteristics of the Large Gap Semi-Insulating GaAs Photoconductive Switch |
SHI Wei1**, MA Xiang-Rong1,2
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1Department of Applied Physics, Xi'an University of Technology, Xi'an 710048
2Institute of Physics and Electionic Enginerting, Xinjiang Normal University, Urumqi 830054 |
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Cite this article: |
SHI Wei, MA Xiang-Rong 2011 Chin. Phys. Lett. 28 124201 |
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Abstract Unique experimental phenomena are discovered in a large gap semiinsulating (SI) GaAs photoconductive semiconductor switch (PCSS) and the peculiar transmission characteristics are exhibited in the experiment. The transmission characteristics for the large gap SI-GaAs PCSS are entirely different from the commonly designed PCSS. By analyzing the differences of the transmission characteristics between the common and the large gap SI-GaAs PCSS, a detailed statistical analysis and theoretical explanations are expounded. The large gap SI-GaAs PCSS works in the overvoltage relaxation limit space charge accumulation (LSA) mode when the conditions of 5×104 s⋅cm−3 ≤ n0/f ≤ 3×105 s⋅cm−3 and n0 L ≥ 1013 cm−2 must be met in the switch, with n0 being carrier concentration and f the frequency. The large gap SI-GaAs PCSS we developed has not shown the nonlinear (lock-in) behavior at high bias voltage, so the withstand voltage and service life for PCSS are improved.
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Keywords:
42.65.Re
72.40.+w
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Received: 08 June 2011
Published: 29 November 2011
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PACS: |
42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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72.40.+w
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(Photoconduction and photovoltaic effects)
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