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Proceedings Paper

A 48-pixel array of single photon avalanche diodes for multispot single molecule analysis
Author(s): Angelo Gulinatti; Ivan Rech; Piera Maccagnani; Massimo Ghioni
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Paper Abstract

In this paper we present an array of 48 Single Photon Avalanche Diodes (SPADs) specifically designed for multispot Single Molecule Analysis. The detectors have been arranged in a 12x4 square geometry with a pitch-to-diameter ratio of ten in order to minimize the collection of the light from non-conjugated excitation spots. In order to explore the tradeoffs between the detectors’ performance and the optical coupling with the experimental setup, SPADs with an active diameter of 25 and of 50μm have been manufactured. The use of a custom technology, specifically designed for the fabrication of the detectors, allowed us to combine a high photon detection efficiency (peak close to 50% at a wavelength of 550nm) with a low dark count rate compatible with true single molecule detection. In order to allow easy integration into the optical setup for parallel single-molecule analysis, the SPAD array has been incorporated in a compact module containing all the electronics needed for a proper operation of the detectors.

Paper Details

Date Published: 4 February 2013
PDF: 8 pages
Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86311D (4 February 2013); doi: 10.1117/12.2003984
Show Author Affiliations
Angelo Gulinatti, Politecnico di Milano (Italy)
Ivan Rech, Politecnico di Milano (Italy)
Piera Maccagnani, IMM-CNR sezione di Bologna (Italy)
Massimo Ghioni, Politecnico di Milano (Italy)
MPD Micro-Photon-Devices (Italy)

Published in SPIE Proceedings Vol. 8631:
Quantum Sensing and Nanophotonic Devices X
Manijeh Razeghi, Editor(s)

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