The Ge0.89Sn0.11 photoconductors with interdigitated electrodes have been investigated. High responsivity of 28.5 A/W and spectral response cutoff at 3.0 μm were achieved. The D* of 4.5×1010 cm∙Hz1/2W−1 is close to that of extended-InGaAs detector.

© 2017 Optical Society of America

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