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Magnetically Tunable Spontaneous Superradiance from Mesoscopic Perovskite Emitter Clusters
Ruihua He1, Abdullah Rasmita2, Lei Zhou1
1Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
The Journal of Physical Chemistry Letters
|March 8, 2023
Summary
Superradiance was observed in small ensembles of perovskite emitters, enabling bright, low-cost quantum light sources. Magnetic fields were found to tune superradiant photon bunching, revealing a decoherence mechanism.
Area of Science:
- Materials Science
- Quantum Optics
- Solid-State Physics
Background:
- Perovskite emitters offer low cost and high quantum yield for optical sources.
- Superradiant emission from coupled emitters can create bright entangled photon sources.
Purpose of the Study:
- To observe and characterize superradiance in small ensembles of CsPbBr3 perovskite emitters.
- To investigate the effect of magnetic fields on superradiance in these systems.
Main Methods:
- Time-resolved photoluminescence spectroscopy.
- Second-order photon correlation measurements.
- Off-resonance excitation of mesoscopic perovskite ensembles.
Main Results:
- Observation of spontaneous superradiance from mesoscopic (<55) CsPbBr3 perovskite emitters.
- Demonstration of magnetic tunability of superradiant photon bunching.
- Identification of a magnetic field-induced decoherence process.
Conclusions:
- Superradiance is achievable in small perovskite systems, paving the way for novel quantum light sources.
- Magnetic fields offer a method to control and understand decoherence in perovskite superradiance.
- Theoretical modeling using a microscopic master equation successfully explains experimental observations.
