fig1

Figure 1. (A) Collisional ionization of electrons in p-i-n structure; (B) a typical gain-voltage curve of an APD. p-i-n: Positive-intrinsic-negative; APD: avalanche photodetector.
Figure 1. (A) Collisional ionization of electrons in p-i-n structure; (B) a typical gain-voltage curve of an APD. p-i-n: Positive-intrinsic-negative; APD: avalanche photodetector.
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