Photonic crystal subwavelength multiplexed imaging device with adjustable image point position

The invention relates to a photonic crystal subwavelength multiplexed imaging device with the adjustable image point position. Circular air columns with the same radiuses are periodically arranged inthe basal silicon medium according to an equilateral triangular lattice, wherein the refractive index of the substrate medium silicon is 3.45, and the entire photonic crystal structure is further an equilateral triangular structured silicon medium. In order to make the half width of multiplexed image point imaging smaller, the three-sided edge cylindrical air columns of the triangular photonic crystal are cut, and the best imaging effect can be acquired when the cutting removal ratio of the cylindrical air columns reaches 20% of the radius. The imaging device is advantaged in that the structure is simple, imaging precision is high, the position of a light source point and an image point is flexible, operationality is strong, the imaging device is suitable for a specific sub-wavelength multiplexed imaging system, p