Heralded Spectroscopy: a new single-particle probe for nanocrystal photophysics

Gur Lubin, Ron Tenne, Arin Can Ulku, Ivan Michel Antolovic, Samuel Burri, Sean Karg, Venkata Jayasurya Yallapragada, Gili Yaniv, Miri Kazes, Daniel Amgar, Nadav Frenkel, Claudio Bruschini, Edoardo Charbon, Dan Oron

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Semiconductor nanocrystals feature multiply-excited states that display intriguing physics and significantly impact nanocrystal-based technologies. Fluorescence supplies a natural probe to investigate these states. Still, direct observation of multiexciton fluorescence has proved elusive to existing spectroscopy techniques. Heralded Spectroscopy is a new tool based on a breakthrough single-particle, single-photon, sub-nanosecond spectrometer that utilizes temporal photon correlations to isolate multiexciton emission. This proceedings paper introduces Heralded Spectroscopy and reviews some of the novel insights it uncovered into exciton–exciton interactions within single nanocrystals. These include weak exciton–exciton interactions and their correlation with quantum confinement, biexciton spectral diffusion, multiple biexciton species and biexciton emission polarization.

Original languageEnglish
Title of host publicationSingle Molecule Spectroscopy and Superresolution Imaging XVI
EditorsIngo Gregor, Felix Koberling, Rainer Erdmann
PublisherSPIE
ISBN (Electronic)9781510658776
DOIs
StatePublished - 1 Jan 2023
EventSingle Molecule Spectroscopy and Superresolution Imaging XVI 2023 - San Francisco, United States
Duration: 28 Jan 202329 Jan 2023

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume12386
ISSN (Print)1605-7422

Conference

ConferenceSingle Molecule Spectroscopy and Superresolution Imaging XVI 2023
Country/TerritoryUnited States
CitySan Francisco
Period28/01/2329/01/23

Keywords

  • SPAD arrays
  • biexciton binding energy
  • multiexcitons
  • perovskite nanocrystals
  • quantum dots
  • single-particle spectroscopy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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