Shot Noise Suppression in Avalanche Photodiodes

Details Shot Noise Suppression in Avalanche Photodiodes Shot Noise Suppression in Avalanche Photodiodes

2005-10-06

arxiv.org/abs/physics/0510051v1

Physics

Computational Physics

Phys. Rev. Lett., accepted for publication

Scientific paper

We identify a new shot noise suppression mechanism in a thin (~100 nm) heterostructure avalanche photodiode. In the low-gain regime the shot noise is suppressed due to temporal correlations within amplified current pulses. We demonstrate in a Monte Carlo simulation that the effective excess noise factors can be <1, and reconcile the apparent conflict between theory and experiments. This shot noise suppression mechanism is independent of known mechanisms such as Coulomb interaction, or reflection at heterojunction interfaces.

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