Computer‐Generated Holographic Nanoprinting

Abstract

Metasurface‐assisted nanoprinting is usually enabled by spectrum‐modulation and/or polarization‐modulation at the subwavelength scale. The spectrum‐modulated nanoprint works under unpolarized white‐light and requires the minimalist observation conditions, but it can hardly modulate light brightness; the polarization‐modulated nanoprint can continuously control light brightness, but it requires complex and precise polarization control both at the input and output ends to decode a nanoprinting image. In this study, computer‐generated holographic nanoprinting is designed and experimentally demonstrated, enabled by Pancharatnam–Berry phase modulation of light, which has both the advantages of the two types of nanoprintings while avoiding their disadvantages. Specifically, a general platform is built to implement single‐channel/multichannel/color nanoprinting in a holography way, which presents its unique characteristics like incoherent light illumination, arbitrary brightness modulation, polarization insensitivity, and zero‐dispersion. A periodic phase is further attached to the target object wave during the holographic interference pattern generation, and the reconstructed nanoprinting image only appears in the zero‐order diffraction direction, thus making the information delivery safer. This study can empower advanced research on metasurface‐based nanoprinting, which can find its markets in ultracompact image‐display, data storage, information multiplexing, and many other related fields.

Full Complex‐Amplitude Engineering by Orientation‐Assisted Bilayer Metasurfaces

“…Computer generated holograms (CGH) can be used to realize wavefront manipulation and holographic display. [1][2][3] By simulating the propagation and interference of object light waves Metasurface, [4][5][6][7][8] a two-dimensional artificial material characterized by an array of subwavelength structures sitting on a planar substrate, has shown its unprecedented ability to precisely manipulate the fundamental optical parameters of incident light waves. [9][10][11][12][13] There are abundant achievements in the study of phase [14][15][16][17][18][19][20] and amplitude [21][22][23][24][25] modulation by metasurfaces.…”

“…Computer generated holograms (CGH) can be used to realize wavefront manipulation and holographic display. [ 1–3 ] By simulating the propagation and interference of object light waves through numerical calculation, one can encode the amplitude and phase of light waves into a CGH, and finally reconstruct the three‐dimensional (3D) light field carrying object information through optical diffraction. In this process, a functional element with precise complex‐amplitude modulation is the key to the digital encoding of holograms and the modulation of light waves.…”

Multi‐Dimensional Light‐Emitting Meta‐Display: Photoluminescence and Pumping Light Multiplexing

“…Toward the next generation of intelligent display devices, several studies have explored the display capabilities of lightemitting metasurface, such as holographic displays [33][34][35][36][37][38] and printing displays. [39][40][41] For instance, Liu et al have recently presented a noteworthy investigation successfully demonstrating a light-emitting metasurface to achieve color printing under white light and fluorescence printing. [41] Moreover, recent work by Rezaei et al showcases a tri-functional light-emitting metasurface capable of achieving holographic display, color printing, and luminescent printing.…”