Abstract: The present invention discloses a multi-mode polarization-sensitive infrared band metamaterial absorber based on a chain-type structure, which comprises a metal resonator, a dielectric layer, and a metal reflection layer arranged sequentially from top to bottom. The metal resonator and the metal reflection layer form a resonant cavity for capturing incident light. The metal resonator comprises resonant units arranged periodically. Each resonant unit comprises sequentially connected resonant groups. Each resonant group comprises a central metal block, a first metal block, a second metal block, a third metal block, and a fourth metal block. The first metal block and the third metal block are disposed on one side of the central metal block and are in contact therewith. The second metal block and the fourth metal block are disposed on another side of the central metal block and are in contact therewith. The present invention achieves a multi-mode, broadband, polarized absorption response.

Abstract: A holographic storage optical system, relating to the field of holographic storage optics, includes: a first metasurface provided in an optical path of a S-polarized writing light beam, configured to split the writing light beam into a first polarized light and a second polarized light exhibiting an off-axis focusing characteristic; a second metasurface provided in the optical path of the second polarized light, configured to reflect the second polarized light into parallel light; a mask with a target image provided in the optical path of the parallel light; a third metasurface provided in the optical path of the second polarized light and configured to focus the parallel light after it passes through the mask; and a photosensitive material provided at an intersection of the first polarized light and the focused polarized light. The present application simplifies the construction of the holographic storage optical system.

Abstract: The present disclosure provides a metamaterial absorber integrated long-wave infrared focal plane array (LWIRFPA), including: a resonator layer, a dielectric layer, and a metal layer. The resonator layer is of a sub-wavelength periodic resonator array structure, generates surface plasmon resonance (SPR), and is made of a metal or metalloid material. The SPR refers to propagating surface plasmon resonance (PSPR) or localized surface plasmon resonance (LSPR). By using corresponding shape and structural size of a resonator, the present disclosure achieves broadband absorption, narrow-band absorption, multi-wavelength absorption, polarization-selective absorption, etc. By integrating the metamaterial absorber on the IRFPA, not only can the absorptivity be improved, but also more functions can be achieved by the IRFPA.