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Quantum Efficiency of Single Dibenzoterrylene Molecules in
Mohammad Musavinezhad1,2, Alexey Shkarin1, Dominik Rattenbacher1
1Max Planck Institute for the Science of Light, D-91058 Erlangen, Germany.
The Journal of Physical Chemistry. B
|June 2, 2023
Summary
We measured the quantum efficiency (QE) of dibenzoterrylene (DBT) molecules at cryogenic temperatures. A large fraction of molecules showed high QE, confirming DBT
Area of Science:
- Quantum optics
- Single-molecule spectroscopy
- Solid-state physics
Background:
- Dibenzoterrylene (DBT) molecules are promising for quantum optics applications.
- Accurate measurement of quantum efficiency (QE) is crucial for evaluating single-photon emitters.
- Previous studies suggested low QE values at ambient conditions.
Purpose of the Study:
- To accurately determine the quantum efficiency (QE) of individual dibenzoterrylene (DBT) molecules.
- To investigate the suitability of DBT for quantum optics experiments.
- To explore the temperature dependence of DBT's QE.
Main Methods:
- Combines two distinct methods for QE measurement: maximal photon emission and power saturation of the zero-phonon line.
- Utilizes cryogenic temperatures to enhance measurement precision.
- Employs single-molecule spectroscopy techniques.
Main Results:
- A significant fraction of DBT molecules exhibit QE values exceeding 50%, with some reaching over 70%.
- No correlation was found between QE and molecular lifetime, indicating high intrinsic efficiency.
- The results suggest a strong temperature dependence of QE, with higher values at cryogenic temperatures.
Conclusions:
- DBT molecules demonstrate high quantum efficiency at cryogenic temperatures, validating their use in quantum optics.
- The observed high QE suggests DBT is a suitable material for advanced quantum technologies.
- The findings imply that cryogenic environments are key to unlocking the full potential of DBT for quantum applications.
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