Feature-Resolved Photoluminescence Analysis: Probing Emission Beyond Conventional Photon Statistics

TL;DR

This paper introduces a feature-resolved photoluminescence analysis method combining lifetime, spectral, and photon correlation techniques to reveal emission dynamics in single emitters that are hidden in traditional ensemble measurements.

Contribution

It presents a novel integrated approach for analyzing photoluminescence that uncovers emission processes beyond conventional photon statistics, applicable to various quantum emitters.

Findings

Uncovered emission dynamics in single quantum dots using feature-resolved analysis.

Estimated radiative and non-radiative recombination parameters.

Demonstrated broad applicability to different photoluminescent materials.

Abstract

We present a feature-resolved methodology to analyse the photoluminescence dynamics of single emitters using a combination of lifetime, spectral, and photon correlation analyses. By integrating conventional ensemble photon statistics measurements with emission state-resolved, spectrally filtered, and lifetime-gated methods, we uncover emission dynamics that remain hidden in ensemble treatment. We study the fluorescence of single CdSe/CdS core/shell colloidal quantum dots under varying excitation powers. Using feature-resolved analysis, we understand the radiative and non-radiative recombination processes, and estimate quantum parameters. Event-selective analysis provides a versatile toolkit for characterizing emitters, both single and aggregate particles. These methods are broadly applicable to a wide class of photoluminescent emitters, such as nitrogen vacancy centres in nanodiamond, epitaxial quantum dots, and perovskite nanocrystals. The application of these lateral investigation techniques will contribute to the advancement of quantum light source development.