Generalized laws of refraction and reflection at interfaces between different photonic artificial gauge fields

摘要

Two rectangular arrays of waveguides (red: upper array, blue: lower array) are stacked on top of each other, creating an artificial GF interface in the y-direction. The waveguide arrays are tilted by 2η with respect to each other. Otherwise, the parameters for the two arrays are identical. a Front view. b Top view. The dashed box represents one unit cell in the x–z-plane in the upper array. c SEM image of the inverse fabricated waveguide sample from the side. The inset shows a magnified region to visualize the hollow waveguides. d Microscope image of the infiltrated sample from the top