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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...

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Related Experiment Video

Updated: May 30, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
08:35

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

Published on: December 16, 2019

Luminescence-lifetime mapping in diamond.

Gediminas Liaugaudas1, Alan T Collins, Klaus Suhling

  • 1Department of Physics, King's College London, Strand, London WC2R 2LS, UK.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|August 12, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces luminescence lifetime mapping for diamond optical centers. We found that single nitrogen atoms and A aggregates quench luminescence, while B aggregates have minimal impact, advancing diamond material analysis.

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Optics

Background:

  • Luminescence lifetimes are crucial for understanding optical centers in diamond.
  • Previous studies have not extensively explored luminescence lifetime mapping.
  • The stability of optical centers under laser excitation is a key consideration.

Purpose of the Study:

  • Introduce luminescence lifetime mapping as a novel technique for diamond optical center analysis.
  • Investigate the stability of the H3 optical center under focused laser excitation.
  • Quantify non-radiative energy transfer pathways and quenching mechanisms in diamond.

Main Methods:

  • Developed and applied luminescence lifetime mapping technique.
  • Investigated H3 optical center stability and saturation thresholds.
  • Measured non-radiative energy transfer times between various optical centers (H3, N3, NV(-), single N, A aggregates, B aggregates).

Main Results:

  • H3 luminescence saturation requires excitation power densities above 10 MW cm⁻².
  • Non-radiative energy transfer time from H3 to A aggregates is ~3 × 10⁻¹⁶ s, similar to N3 to A aggregates.
  • Non-radiative energy transfer occurs from NV(-) to single substitutional nitrogen atoms, which can quench luminescence.
  • B aggregates show minimal quenching of visible luminescence from H3 and H4 centers.

Conclusions:

  • Luminescence lifetime mapping is a viable technique for studying diamond optical centers.
  • Single substitutional nitrogen atoms and A aggregates act as luminescence quenchers.
  • B aggregates have a negligible effect on visible luminescence quenching in diamond, providing insights into defect interactions.