Dual-Band Ge-on-Si Photodetector Array With Custom, Integrated Readout Electronics

Iacovo, Andrea De; Mitri, Federica; Ballabio, Andrea; Frigerio, Jacopo; Isella, Giovanni; Ria, Andrea; Cicalini, Mattia; Bruschi, P.; Colace, Lorenzo

doi:10.1109/jsen.2022.3141929

Cited by 3 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plenty of works have been carried out on Ge-on-Si photodetector's design, and a series of progress has already been made in recent years [7][8][9][10][11][12]. However, its properties need further improvement for the application in 5G communication, optical computation, unmanned driving, and optical sensing [13][14][15]. Geon-Si photodetectors are currently available in two main structures: vertical and lateral PIN junctions.…”

Section: Introductionmentioning

confidence: 99%

Configuration of the active region for the Ge-on-Si photodetector based on carrier mobility

Chang

Xie

et al. 2023

Front. Phys.

View full text Add to dashboard Cite

The design of vertical and lateral PIN Ge-on-Si photodetectors was motivated by the disparity in electron and hole mobilities. In the case of vertical PIN junction detectors, configuring the slab region as n-type doping leads to a notable increase in the bandwidth of approximately 20 GHz compared to utilizing p-type doping for the slab. For lateral PIN junction detectors, we determined that setting the length of the n-type slab region to be 2.8 times that of the p-type slab region, based on the carrier saturation drift rate ratio, does not compromise the bandwidth. This configuration enhances the bandwidth while minimizing light absorption loss from the electrode. The proposed design in this study enhances the performance of Ge-on-Si photodetectors without adding complexity to the fabrication process. The principles applied in this study serve as instructive references for the conceptualization of other photonic or electronic devices, reinforcing the widespread applicability of these design strategies.

show abstract