  Research on photonic cavities with low mode volume and high quality factor
garners much attention because of applications ranging from optoelectronics to
cavity quantum electrodynamics (QED). We propose a cavity based on surface
plasmon modes confined by metallic distributed Bragg reflectors. We analyze the
structure with Finite Difference Time Domain simulations and obtain modes with
quality factor 1000 (including losses from metals), reduced mode volume
relative to photonic crystal cavities, Purcell enhancements of hundreds, and
even the capability of enabling cavity QED strong coupling.

Quantum Physics;Optics