We theoretically propose and investigate the resonant wavelength-selective optical filters based on the subwavelength metallo-dielectric nanopatch cavities and the metal slot waveguides. Using the temporal coupled-mode theory and three-dimensional finite-difference time-domain simulations. we analyze the optical coupling efficiencies and filtering characteristics. which are optimized ... https://poolsproductscanadas.shop/product-category/in-ground-products-heating/