This review presents a reflection-type holographic memory using three-dimensional(3D)speckle-shift multiplexing. First, the schematic of the proposed memory system was described. Then,experimental demonstrations of mu...This review presents a reflection-type holographic memory using three-dimensional(3D)speckle-shift multiplexing. First, the schematic of the proposed memory system was described. Then,experimental demonstrations of multiplexing in plane and along the depth direction were presented. The estimated storage capacity of single layer recording was introduced and the maximum storage capacity was discussed. To increase the storage capacity, the multi-layered recording was described. In the multilayered recording, the storage capacity can be increased by appropriate arrangement of holograms in each layer.展开更多
Photon nanosieves,as amplitude-type metasurfaces,have been demonstrated usually in a transmission mode for optical super-focusing,display,and holography,but the sieves with subwavelength size constrain optical transmi...Photon nanosieves,as amplitude-type metasurfaces,have been demonstrated usually in a transmission mode for optical super-focusing,display,and holography,but the sieves with subwavelength size constrain optical transmission,thus leading to low efficiency.Here,we report reflective photon nanosieves that consist of metallic meta-mirrors sitting on a trans-parent quartz substrate.Upon illumination,these meta-mirrors offer the reflectance of〜50%,which is higher than the transmission of visible light through diameter-identical nanoholes.Benefiting from this configuration,a meta-mirror-based reflective hologram has been demonstrated with good consistence between theoretical and experimental results over the broadband spectrum from 500 nm to 650 nm,meanwhile exhibiting total efficiency of〜7%.Additionally,if an additional high-reflectance layer is employed below these meta-mirrors,the efficiency can be enhanced further for optical anti-counterfeiting.展开更多
文摘This review presents a reflection-type holographic memory using three-dimensional(3D)speckle-shift multiplexing. First, the schematic of the proposed memory system was described. Then,experimental demonstrations of multiplexing in plane and along the depth direction were presented. The estimated storage capacity of single layer recording was introduced and the maximum storage capacity was discussed. To increase the storage capacity, the multi-layered recording was described. In the multilayered recording, the storage capacity can be increased by appropriate arrangement of holograms in each layer.
基金supported by the National Natural Science Foundation of China (Nos. 12134013 and 61875181)USTC Research Funds of the Double First-Class Initiative (No. YD2030002003)+2 种基金Fundamental Research Funds for the Central Universities in ChinaCAS Poineer Hundred Talents Program the A*STAR IRG grant A2083c0058,CRF grantthe Centre for Micro and Nanoscale Research and Fabrication, University of Science and Technology of China for the support
文摘Photon nanosieves,as amplitude-type metasurfaces,have been demonstrated usually in a transmission mode for optical super-focusing,display,and holography,but the sieves with subwavelength size constrain optical transmission,thus leading to low efficiency.Here,we report reflective photon nanosieves that consist of metallic meta-mirrors sitting on a trans-parent quartz substrate.Upon illumination,these meta-mirrors offer the reflectance of〜50%,which is higher than the transmission of visible light through diameter-identical nanoholes.Benefiting from this configuration,a meta-mirror-based reflective hologram has been demonstrated with good consistence between theoretical and experimental results over the broadband spectrum from 500 nm to 650 nm,meanwhile exhibiting total efficiency of〜7%.Additionally,if an additional high-reflectance layer is employed below these meta-mirrors,the efficiency can be enhanced further for optical anti-counterfeiting.
