1 results about "Spatial dispersion" patented technology

The application provides a polarization-independent BIC metal super surface optical edge detection device and a design method, the method shows a simple and easy-to-process metal super surface, the device can realize high-quality polarization-independent two-dimensional optical edge detection with high numerical aperture and high efficiency. The design scheme provided by the method takes silicon dioxide as a substrate and C4 symmetric L-shaped aluminum metal patch as a basic unit, adjusts and controls the spatial dispersion of BIC by fine-tuning the perturbation parameters of the super surface, and realizes the polarization-independent second-order spatial differential operation. The design scheme works at a frequency of 0.6718 THz, the numerical aperture (NA) can be as high as 0.56, the peak efficiency can be as high as 36%, and the high-quality edge detection performance can be maintained. The work can realize compact, low-power and ultrafast optical edge detection, and shows great potential in various applications such as optical imaging and computer vision.