Light-matter interaction in open cavities with dielectric stacks
Applied Physics Letters AIP Publishing 118:15 (2021) 154002
Abstract:
We evaluate the exact dipole coupling strength between a single emitter and the radiation field within an optical cavity, taking into account the effects of multilayer dielectric mirrors. Our model allows one to freely vary the resonance frequency of the cavity, the frequency of light or atomic transition addressing it, and the design wavelength of the dielectric mirror. The coupling strength is derived for an open system with unbound frequency modes. For very short cavities, the effective length used to determine their mode volume and the lengths defining their resonances are different, and also found to diverge appreciably from their geometric length, with the radiation field being strongest within the dielectric mirror itself. Only for cavities much longer than their resonant wavelength does the mode volume asymptotically approach that normally assumed from their geometric length.Efficient operator method for modeling mode mixing in misaligned optical cavities
Physical Review A American Physical Society
Abstract:
The transverse field structure and diffraction loss of the resonant modes of Fabry-P'erot optical cavities are acutely sensitive to the alignment and shape of the mirror substrates. We develop extensions to the `mode mixing’ method applicable to arbitrary mirror shapes, which both facilitate fast calculation of the modes of cavities with transversely misaligned mirrors and enable the determination and transformation of the geometric properties of these modes. We show how these methods extend previous capabilities by including the practically-motivated case of transverse mirror misalignment, presenting the ability to study the rich and complex structure of the resonant modes.Light-matter interaction in open cavities with dielectric stacks
University of Oxford