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Photocurrent enhancement in a GaAs metal‐semiconductor‐metal photodetector due to ultrasmall Au islands
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13.We have fabricated interdigitated MSM photodetectors with islands on undoped GaAs substrates. The observed photocurrent enhancement (2–7 times) was smaller than reported here. A responsivity as high as 0.4 A/W was measured over the wavelength range, but higher values are expected. High‐speed testing is in progress, and results will be reported elsewhere.
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