Enhancing Electric Fields in High-Index Resonators by Flux Conservation of the Displacement Current Density
arXiv:2005.10358
Abstract
Concentrating light within subwavelength spatial regions is a central topic in nanophotonics. In this letter, we introduce a general principle for the subwavelength localization and enhancement of electric fields in high-index resonators, based on the flux conservation of the displacement current density. We apply this design rule to a ring resonator by locally squeezing its section: since the flux is conserved, the electric field is necessarily enhanced to compensate the reduction of the section area. The introduced principle may constitute an important step toward the control of the displacement current density at the nanoscale, guiding the design of the topology and the geometry of complex dielectric structures.
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References in corpus (9)
- How to face the loss in plasmonics and metamaterials
- Magnetic light
- Individual nanoantennas empowered by bound states in the continuum for nonlinear photonics
- On-a-chip biosensing based on all-dielectric nanoresonators
- Nanoscale design of the local density of optical states
- Engineering nanoparticles with pure high-order multipole scattering
- Electromagnetic modes and resonances of two-dimensional bodies
- Helicity Maximization of Structured Light to Empower Nanoscale Chiral Matter Interaction
- Helicity Maximization Below the Diffraction Limit