High crosstalk suppression in InGaAs/InP single-photon avalanche diode arrays by carrier extraction structure.

ABSTRACT: Crosstalk has become an urgent issue for single-photon avalanche diode arrays. In previous work, trenches were introduced between pixels to block the crosstalk optical path in planar InGaAs/InP single-photon avalanche diode arrays, since the optical crosstalk was considered as the main crosstalk mechanism. However, the crosstalk suppression effect of this solution is not satisfactory. Here, we demonstrate a carrier extraction structure to efficiently reduce crosstalk by electrically guiding photogenerated crosstalk holes in the non-pixel region to the surface, since we find that the optical-electrical crosstalk is the dominant crosstalk mechanism. Experimental measurements show that a narrow carrier extraction structure makes a 91.52% (96.22%) crosstalk reduction between the nearest neighb

SUBMITTER: Tang Y 

PROVIDER: S-EPMC10796904 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature