Patent ID: 11454739

Abstract:
A method is disclosed of fabricating all-dielectric flat lens with low refractive index comprising: selecting dielectric substrate material and lens structure material; determining incident wavelength; calculating phase modulation corresponding to each pillar unit; periodically sampling circular area of dielectric substrate with radius to obtain plurality of sampling points; calculating phase modulation required at position of each sampling point; obtaining pillar corresponding to each sampling point; arranging different dielectric pillars with low refractive index and same thickness are arranged on dielectric substrate, thereby obtaining all dielectric flat lens with low refractive index. Also disclosed is method of fabricating all-dielectric flat lens with low refractive index that fabricates plane divergent lens with high transmission in wavelength range of visible light, and providing all-dielectric flat lens with low refractive index to improve transmission in visible light region through using dielectric with low refractive index to replace metal and dielectric with high refractive index.