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Proceedings Paper

Single molecule localization with four avalanche photodiode detectors
Author(s): Megan K. Dunlap; Duncan P. Ryan; Peter M. Goodwin; James H. Werner; Somak Majumder; Jennifer A. Hollingsworth; Martin P. Gelfand; Alan Van Orden
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Paper Abstract

Photoluminescence images can be acquired with detection schemes that have both single-photon sensitivity and nanosecond scale temporal resolution, enabling the study of possible structural bases for photoluminescence lifetimes and other features of the photon arrival statistics. Within the context of super-resolution (SR) imaging, this has been demonstrated with detection schemes that collect images with a bundle of optical fibers that are coupled to individual single-photon counting avalanche photodiode detectors. Recently, our group used a bundle of four optical fibers to collect these “time-resolved photon arrival” images. Despite the paucity of information contained in a four-pixel image, we precisely located the emission centroid of quantum dots (QDs) and observed correlations between centroid location, photoluminescence lifetime, and intensity within clusters of QDs that were suggestive of electronic interactions among them. This proceedings paper details the approach that we used to locate the emission centroid based on the counts in the four detectors.

Paper Details

Date Published: 13 February 2020
PDF: 11 pages
Proc. SPIE 11246, Single Molecule Spectroscopy and Superresolution Imaging XIII, 112460O (13 February 2020); doi: 10.1117/12.2546573
Show Author Affiliations
Megan K. Dunlap, Colorado State Univ. (United States)
Duncan P. Ryan, Los Alamos National Lab. (United States)
Peter M. Goodwin, Los Alamos National Lab. (United States)
James H. Werner, Los Alamos National Lab. (United States)
Somak Majumder, Los Alamos National Lab. (United States)
Jennifer A. Hollingsworth, Los Alamos National Lab. (United States)
Martin P. Gelfand, Colorado State Univ. (United States)
Alan Van Orden, Colorado State Univ. (United States)

Published in SPIE Proceedings Vol. 11246:
Single Molecule Spectroscopy and Superresolution Imaging XIII
Ingo Gregor; Felix Koberling; Rainer Erdmann, Editor(s)

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