In-depth analysis of optical crosstalk in single-photon avalanche diode arrays

Ivan Rech; Antonino Ingargiola; Roberto Spinelli; Ivan Labanca; Stefano Marangoni; Massimo Ghioni; Sergio Cova

doi:10.1117/12.733772

15 October 2007 In-depth analysis of optical crosstalk in single-photon avalanche diode arrays

Ivan Rech, Antonino Ingargiola, Roberto Spinelli, Ivan Labanca, Stefano Marangoni, Massimo Ghioni, Sergio Cova

Proceedings Volume 6771, Advanced Photon Counting Techniques II; 677111 (2007) https://doi.org/10.1117/12.733772
Event: Optics East, 2007, Boston, MA, United States

Abstract

One of the main drawbacks of Single Photon Avalanche Diode arrays is the optical crosstalk between adjacent detectors. This phenomenon represents a fundamental limit to the density of arrays, since the crosstalk increases with reducing the distance between adjacent devices. In the past, crosstalk was mainly ascribed to the light propagating from one detector to another through a direct optical path. Accordingly, deep trenches coated with metal were introduced as optical isolation barriers between pixels. This solution, however, was unable to completely prevent the crosstalk. In this paper we present experimental evidence that a significant contribution to crosstalk comes from photons reflected internally at the bottom of the chip. These photons can bypass trenches making them ineffective. We also propose an optical model suitable to predict the dependence of crosstalk on the position within the array.

Citation Download Citation

Ivan Rech, Antonino Ingargiola, Roberto Spinelli, Ivan Labanca, Stefano Marangoni, Massimo Ghioni, and Sergio Cova "In-depth analysis of optical crosstalk in single-photon avalanche diode arrays", Proc. SPIE 6771, Advanced Photon Counting Techniques II, 677111 (15 October 2007); https://doi.org/10.1117/12.733772

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available