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Related Experiment Video

Updated: May 25, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

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Published on: September 5, 2019

Electrically driven photon antibunching from a single molecule at room temperature.

Maximilian Nothaft1, Steffen Höhla, Fedor Jelezko

  • 13rd Physics Institute and Research Center SCoPE, University of Stuttgart, 70550 Stuttgart, Germany. m.nothaft@physik.uni-stuttgart.de

Nature Communications
|January 19, 2012
PubMed
Summary

Researchers demonstrate stable single-molecule electroluminescence at room temperature. This breakthrough enables electrically driven single-photon sources using organic molecules, advancing quantum technologies.

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Area of Science:

  • Quantum optics and photonics
  • Organic electronics
  • Solid-state physics

Background:

  • Single-photon emitters are crucial for quantum information processing, cryptography, and metrology.
  • Electrical excitation of single-photon emitters is desirable for integration and electron-photon interfaces.
  • Previous attempts with quantum dots at room temperature were limited by low exciton binding energies, preventing sub-Poissonian photon statistics.

Purpose of the Study:

  • To develop an electrically driven single-photon source operating at room temperature.
  • To overcome the limitations of low exciton binding energies in quantum dots.
  • To achieve stable single-molecule emission and detect sub-Poissonian photon statistics in a solid-state matrix.

Main Methods:

  • Utilizing organic molecules with high exciton binding energies (approx. 1 eV).
  • Fabricating a specially designed organic light-emitting diode (OLED) structure.
  • Electrically driving single organic molecules to induce electroluminescence.

Main Results:

  • Demonstrated electroluminescence from single, electrically driven organic molecules at room temperature.
  • Achieved stable single-molecule emission.
  • Successfully detected sub-Poissonian photon statistics, confirming single-photon emission.

Conclusions:

  • Organic molecules are suitable for creating electrically driven single-photon sources at room temperature.
  • The developed OLED structure and molecular choice enable stable single-molecule emission.
  • This work paves the way for practical room-temperature solid-state single-photon sources for quantum applications.