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The Purcell effect modifies light emission in optical resonators. Quantized fluctuational electrodynamics (QFED) simplifies this by using local coefficients, enabling a new radiative transfer equation (RTE) model.

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Area of Science:

  • Quantum optics
  • Electrodynamics
  • Optical resonators

Background:

  • The Purcell effect, a change in spontaneous emission rate due to optical interference, is crucial for light-matter coupling in optical resonators.
  • Accurate modeling traditionally requires complex Maxwell's equations combined with quantum optical source terms.

Purpose of the Study:

  • To demonstrate that nonlocal wave and local particle features of light in stratified media can be described by local coefficients.
  • To reformulate the radiative transfer equation (RTE) using a new framework.

Main Methods:

  • Utilized the quantized fluctuational electrodynamics (QFED) framework.
  • Derived local damping and scattering coefficients from QFED.
  • Reformulated the radiative transfer equation (RTE).

Main Results:

  • QFED successfully captures nonlocal interference and emission as local, directionally resolved effects.
  • The reformulated RTE is a physically transparent, interference-exact model.
  • This approach extends the applicability of efficient, quantum-accurate optical models.

Conclusions:

  • Quantized fluctuational electrodynamics (QFED) provides a simplified yet accurate method for modeling optical phenomena.
  • The new RTE model enhances computational efficiency and quantum optical accuracy for optical devices.