Approaching the upper limits of the local density of states via optimized metallic cavities
arXiv:2005.05374 · doi:10.1364/OE.397502
Abstract
By computational optimization of air-void cavities in metallic substrates, we show that the local density of states (LDOS) can reach within a factor of of recent theoretical upper limits, and within a factor for the single-polarization LDOS, demonstrating that the theoretical limits are nearly attainable. Optimizing the total LDOS results in a spontaneous symmetry breaking where it is preferable to couple to a specific polarization. Moreover, simple shapes such as optimized cylinders attain nearly the performance of complicated many-parameter optima, suggesting that only one or two key parameters matter in order to approach the theoretical LDOS bounds for metallic resonators.
arXiv comment12 pages, 5 figures
References in corpus (15)
- Outlook for inverse design in nanophotonics
- Surface Electromagnetic Waves Thermally Excited: Radiative Heat Transfer, Coherence Properties and Casimir Forces Revisited in the Near Field
- Nonlocal optical response in metallic nanostructures
- Definition and measurement of the local density of electromagnetic states close to an interface
- Fundamental limits to optical response in absorptive systems
- Maximizing the quality factor to mode volume ratio for ultra-small photonic crystal cavities
- Efficient Computation of Power, Force, and Torque in BEM Scattering Calculations
- Fundamental limits to nanoparticle extinction
- Optimization of three-dimensional micropost microcavities for cavity quantum electrodynamics
- Limits to the Optical Response of Graphene and 2D Materials
- Fundamental limits to near-field optical response, over any bandwidth
- Fundamental limits to radiative heat transfer: theory
- Inverse Design of Nanoparticles for Enhanced Raman Scattering
- Electromagnetic Wave Source Conditions
- Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers