Results 61 to 70 of about 4,317 (190)

Topology optimization of freeform large-area metasurfaces

, 2019
We demonstrate optimization of optical metasurfaces over $10^5$--$10^6$ degrees of freedom in two and three dimensions, 100--1000+ wavelengths ($\lambda$) in diameter, with 100+ parameters per $\lambda^2$. In particular, we show how topology optimization,
Johnson, Steven G., Lin, Zin, Liu, Victor, Pestourie, Raphaël   +3 more
core   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

Metasurface Optics for Full-color Computational Imaging

, 2018
Conventional imaging systems comprise large and expensive optical components which successively mitigate aberrations. Metasurface optics offers a route to miniaturize imaging systems by replacing bulky components with flat and compact implementations ...
Colburn, Shane, Majumdar, Arka, Zhan, Alan   +2 more
core   +1 more source

Bio‐inspired nanophotonics: Structural color, chirality, and resonance metasurfaces

InfoMat, EarlyView.
A butterfly‐wing‐inspired anisotropic plasmonic flatband resonant metasurface. Insets, photo of the butterfly, Sasakia charonda, and the SEM image of its wing scale (above); the SEM image of the metasurface (below). Abstract The dazzling colors of butterfly wings and hummingbird feathers are not painted with pigments, but crafted by nature's invisible ...
Weihan Liu, Yao Liang, Din Ping Tsai
wiley   +1 more source

Metalenses phase characterization by multi-distance phase retrieval

Light: Science & Applications
Metalens, characterized by their unique functions and distinctive physical properties, have gained significant attention for their potential applications.
Bowen Liu, Jialuo Cheng, Maoxiong Zhao, Jin Yao, Xiaoyuan Liu, Shaohu Chen, Lei Shi, Din Ping Tsai, Zihan Geng, Mu Ku Chen   +9 more
doaj   +1 more source

Theoretical Design of a Bionic Spatial 3D-Arrayed Multifocal Metalens

Biomimetics, 2022
With the development of micro/nano-optics, metasurfaces are gaining increasing attention working as novel electromagnetic wave control devices. Among which, metalenses have been developed and applied as a typical application of metasurfaces owing to ...
Guihui Duan, Ce Zhang, Dongsheng Yang, Zhaolong Wang   +3 more
doaj   +1 more source

Optical Skyrmions with Tunable or Reconfigurable Topology Using Spin‐Decoupled Metaoptics

Laser &Photonics Reviews, EarlyView.
The work introduces advanced optical elements capable of generating and dynamically reconfiguring complex light patterns known as optical skyrmions. By precisely shaping light polarization at the nanoscale, a single engineered metasurface can generate and manipulate robust and tunable polarization textures in an efficient and scalable way.
Andrea Vogliardi, Daniele Bonaldo, Simone Dal Zilio, Vittorio Apolloni, Filippo Romanato, Gianluca Ruffato   +5 more
wiley   +1 more source

Polarization-separating Alvarez metalens

Optics Express
The rapid advancements in optical communication technologies have highlighted traditional optical components’ limitations, particularly in size, adaptability, and integration capabilities, underscoring the need for more compact and versatile solutions. Metalenses offer a promising pathway to address these challenges, with their ability to provide high ...
Mitsutoshi Hada, Hyo Adegawa, Katsuma Aoki, Satoshi Ikezawa, Kentaro Iwami   +4 more
openaire   +2 more sources

Giant Phonon‐Enhanced Terahertz Electro‐Optic Response in Ferroelectric van der Waals NbOX2 (X = Br, I)

Laser &Photonics Reviews, EarlyView.
Van der Waals ferroelectric NbOX2 thin films exhibit phonon‐resonance enhanced electro‐optic responses, 332 pm/V at 3.1 THz (NbOI2) and 192 pm/V at 3.7 THz (NbOBr2), the highest among vdW materials, and show 4% non‐resonant SHG modulation together with resonant phonon‐enhancement under a 150 kV/cm THz pump.
Baolong Zhang, Ruihuan Duan, Zheng Liu, Ranjan Singh   +3 more
wiley   +1 more source

A Reflective Metalens With Tunable Focal Length for Millimeter Waves

IEEE Access, 2023
A novel architecture of reconfigurable, flat metalens is proposed with an electrically tunable focal length for applications in wireless communication systems working at the frequencies of millimeter waves (i.e., 60 GHz).
Mohammad Ali Shameli, Mirko Magarotto, Antonio-D Capobianco, Luca Schenato, Marco Santagiustina, Domenico De Ceglia   +5 more
doaj   +1 more source