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Chirality-Free Full Decoupling of Jones Matrix Phase-Channels with a Planar Minimalist Metasurface.
Nano Lett
January 2025
Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
The complete manipulation of Jones matrix phase-channels using metasurfaces brings forth unparalleled possibilities across diverse wavefront modulation applications. Traditionally, achieving independent control over all four phase-channels usually involves the introduction of chirality with multilayer or three-dimensional metasurfaces. Here, we present a general chirality-free method that relies on polarization base transformation with a planar minimalist metasurface, effectively decoupling the four Jones matrix phase-channels, thereby unleashing the fundamental boundaries imposed by conventional linear or circular polarization bases.
View Article and Find Full Text PDFDynamic 3D metasurface holography via cascaded polymer dispersed liquid crystal.
Microsyst Nanoeng
December 2024
College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 310018, China.
Metasurface with natural static structure limits the development of dynamic metasurface holographic display with rapid response and broadband. Currently, liquid crystal (LC) was integrated onto the metasurface to convert the passive metasuface into an active one. But, majority of LC-assisted active metasurfaces often exhibit trade-offs among degree of freedom (DoF, typically less than 2), information capacity, response speed, and crosstalk.
View Article and Find Full Text PDFGesture-Interactive Dynamic Holo-Display via Topography Flexible Metasurfaces.
ACS Nano
December 2024
Electronic Information School, Wuhan University, Wuhan 430072, China.
Heading toward the next-generation intelligent optical device, the meta-optics active tunability is one of the most desirable properties to expand its versatility beyond the traditional optical devices. Despite its advances via various tunable approaches, the encoding freedom of tuning capability still critically restricts its widespread engagement and dynamics in real-life applications. Here, we present a gesture-interactive scheme by topography flexible metasurfaces (TFMs) to expand the encoding freedom for the tuning capability.
View Article and Find Full Text PDFHolographic-(V)AE: An end-to-end SO(3)-equivariant (variational) autoencoder in Fourier space.
Phys Rev Res
April 2024
Department of Physics, University of Washington, 3910 15th Avenue Northeast, Seattle, Washington 98195, USA.
Group-equivariant neural networks have emerged as an efficient approach to model complex data, using generalized convolutions that respect the relevant symmetries of a system. These techniques have made advances in both the supervised learning tasks for classification and regression, and the unsupervised tasks to generate new data. However, little work has been done in leveraging the symmetry-aware expressive representations that could be extracted from these approaches.
View Article and Find Full Text PDFSpin-Orbit-Locking Vectorial Metasurface Holography.
Adv Mater
December 2024
Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China.
Vectorial metasurface holography, allowing for independent control over the amplitude, phase, and polarization distribution of holographic images enabled by metasurfaces, plays a crucial role in the realm of optical display, optical, and quantum communications. However, previous research on vectorial metasurface holography has typically been restricted to single degree of freedom input and single channel output, thereby demonstrating a very limited modulation capacity. This work presents a novel method to achieve multi-channel vectorial metasurface holography by harnessing spin-orbit-locking vortex beams.
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