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Self-induced superradiant masing.

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Summary
This summary is machine-generated.

Direct spin-spin interactions drive superradiance in a hybrid system. This leads to subsequent emission pulses and quasi-continuous masing, offering new possibilities for solid-state masers.

Keywords:
Condensed-matter physicsLasers, LEDs and light sourcesQuantum optics

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Area of Science:

  • Quantum Optics
  • Condensed Matter Physics
  • Quantum Information Science

Background:

  • Collective optical effects in superradiance typically assume independent emitters interacting via a common light mode.
  • Direct dipole-dipole interactions are usually considered detrimental, causing decoherence in emitter ensembles.

Purpose of the Study:

  • To investigate the role of direct spin-spin interactions in driving superradiant dynamics.
  • To explore the behavior of a hybrid system comprising nitrogen-vacancy center spins in diamond coupled to a superconducting microwave cavity.

Main Methods:

  • Experimental observation of superradiant dynamics in the hybrid system.
  • Analysis of subsequent emission pulses and quasi-continuous masing.
  • Microscopic simulations to confirm the driving mechanism.

Main Results:

  • Observed a train of emission pulses and quasi-continuous masing after an initial superradiant burst, lasting up to one millisecond.
  • Demonstrated that spectral hole refilling, driven by spin inversion redistribution, causes this behavior.
  • Confirmed that direct dipole-dipole interactions, not other cavity effects, are responsible for the observed dynamics.

Conclusions:

  • Direct spin-spin interactions can actively drive superradiance, contrary to conventional assumptions.
  • The findings open avenues for studying complex spin interactions in disordered systems.
  • Potential for developing ultranarrow-linewidth solid-state superradiant masers using microwave-driven spin control.