title: Enhanced near-infrared photodetection with avalanche gain in silicon microdisk resonators integrated with p-n diodes.
abstract: We investigate the photocurrent generation by two-photon absorption effect in silicon microdisk resonators integrated with p-n diodes. The photocurrent is quite dependent on the p-n junction position with respect to the whispering gallery mode. Avalanche gain increases significantly when the bias exceeds -19  V, leading to considerable enhancement of photocurrent. At -22  V bias with on-chip optical power of 44.7 μW, the responsivity exceeds 1 A/W with an avalanche gain of 188 while the dark current is more than 50 times lower than the photocurrent.
authors: Haike
authors: H
authors: Zhu
authors: Linjie
authors: L
authors: Zhou
authors: Rui
authors: R
authors: Yang
authors: Xinwan
authors: X
authors: Li
authors: Jianping
authors: J
authors: Chen