In this contribution, we investigate the use of high-index nanoparticles as a possible solution for realizing ultra-thin dielectric mirrors working at a desired frequency of the optical spectrum. First, exploiting the Mie theory for spherical scatterers, we will show that it is possible engineering the optical response of a high-index nanoparticle and maximizing the difference between its forward and backward scattering. Then, we will show that, when such optimized nanoparticles are arranged in a proper lattice, they behave as perfect optical mirrors with 20 % fractional bandwidth. A possible realistic implementation, based on crystalline silicon, is also proposed and checked with full-wave simulations.
Monti, A., Toscano, A., Bilotti, F. (2018). Use of dielectric nanoparticles for designing high-reflection coatings and dielectric mirrors. In 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 - Proceedings (pp.2073-2074). 345 E 47TH ST, NEW YORK, NY 10017 USA : IEEE.
Use of dielectric nanoparticles for designing high-reflection coatings and dielectric mirrors
Monti, A
Writing – Original Draft Preparation
;Toscano, ASupervision
;Bilotti, FSupervision
2018-01-01
Abstract
In this contribution, we investigate the use of high-index nanoparticles as a possible solution for realizing ultra-thin dielectric mirrors working at a desired frequency of the optical spectrum. First, exploiting the Mie theory for spherical scatterers, we will show that it is possible engineering the optical response of a high-index nanoparticle and maximizing the difference between its forward and backward scattering. Then, we will show that, when such optimized nanoparticles are arranged in a proper lattice, they behave as perfect optical mirrors with 20 % fractional bandwidth. A possible realistic implementation, based on crystalline silicon, is also proposed and checked with full-wave simulations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.