Demonstration of Far-Infrared GaAs/A1GaAs Quantum Well Photodetectors for Broadband Wavelength Detection

SHEN Wen-Zhong; Perera A. G. U

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Demonstration of Far-Infrared GaAs/A1GaAs Quantum Well Photodetectors for Broadband Wavelength Detection

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We discuss the realization of broadband wavelength detection by demonstrating the longest cutoff wavelength (λ,c = 28.6 μm) far-infrared GaAs/AIGaAs quantum well infrared photodetectors (QWIPs). The responsivity is comparable to that of mid-infrared GaAs/AIGaAs and InGaAs/GaAs QWIPs, with a responsivity of 0.265 A/W and detectivity of 3.4×109 cm. Hz1/2/W at the peak wavelength of 26.9μm at 4.2K. Based on the temperature dependent dark current and response results, it is expected that similar performance can be obtained at least up to 20 K. Several ways to expand the wavelength coverage are also addressed.

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《中国物理快报：英文版》 |2000年第12期|921-923|共3页
作者
SHEN Wen-Zhong; Perera A. G. U;
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Department of Applied Physics, Shanghai Jiao Tong University, Shanghai 200030;

National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Shanghai 200083;

Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA;

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Demonstration of Far-Infrared GaAs/A1GaAs Quantum Well Photodetectors for Broadband Wavelength Detection

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