3 research outputs found
Coupling slot-waveguide cavities for large-scale quantum optical devices
By offering effective modal volumes significantly less than a cubic
wavelength, slot-waveguide cavities offer a new in-road into strong atom-photon
coupling in the visible regime. Here we explore two-dimensional arrays of
coupled slot cavities which underpin designs for novel quantum emulators and
polaritonic quantum phase transition devices. Specifically, we investigate the
lateral coupling characteristics of diamond-air and GaP-air slot waveguides
using numerically-assisted coupled-mode theory, and the longitudinal coupling
properties via distributed Bragg reflectors using mode-propagation simulations.
We find that slot-waveguide cavities in the Fabry-Perot arrangement can be
coupled and effectively treated with a tight-binding description, and are a
suitable platform for realizing Jaynes-Cummings-Hubbard physics.Comment: 11 pages, 7 figures, submitte
Slot-waveguide cavities for optical quantum information applications
To take existing quantum optical experiments and devices into more practical
regimes requires the construction of robust, solid-state implementations. In
particular, to observe the strong-coupling regime of atom-photon interactions
requires very small cavities and large quality factors. Here we show that the
slot-waveguide geometry recently introduced for photonic applications is also
promising for quantum optical applications in the visible regime. We study
diamond- and GaP-based slot-waveguide cavities (SWCs) compatible with diamond
colour centres e.g. nitrogen-vacancy (NV) defect, and show that one can achieve
increased single-photon Rabi frequencies of order O(10^11) Hz in ultra-small
cavity modal volumes, nearly 2 orders of magnitude smaller than previously
studied diamond-based photonic crystal cavities.Comment: 9 pages, 4 figures (all in colour), minor revision