Gate-Tunable Conducting Oxide Metasurfaces
Yao-Wei Huang,Ho Wai Howard Lee,Ruzan Sokhoyan,Ragip Pala,Krishnan Thyagarajan,Seung-hoon Han,Din Ping Tsai,Harry A. Atwater,Harry A. Atwater +8 more
TLDR
In principle, electrically gated phase and amplitude control allows for electrical addressability of individual metasurface elements and opens the path to applications in ultrathin optical components for imaging and sensing technologies, such as reconfigurable beam steering devices, dynamic holograms, tunable ultrathins, nanoprojectors, and nanoscale spatial light modulators.Abstract:
Metasurfaces composed of planar arrays of subwavelength artificial structures show promise for extraordinary light manipulation. They have yielded novel ultrathin optical components such as flat lenses, wave plates, holographic surfaces, and orbital angular momentum manipulation and detection over a broad range of the electromagnetic spectrum. However, the optical properties of metasurfaces developed to date do not allow for versatile tunability of reflected or transmitted wave amplitude and phase after their fabrication, thus limiting their use in a wide range of applications. Here, we experimentally demonstrate a gate-tunable metasurface that enables dynamic electrical control of the phase and amplitude of the plane wave reflected from the metasurface. Tunability arises from field-effect modulation of the complex refractive index of conducting oxide layers incorporated into metasurface antenna elements which are configured in reflectarray geometry. We measure a phase shift of 180° and ∼30% change in the...read more
Citations
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A broadband achromatic metalens in the visible
Shuming Wang,Pin Chieh Wu,Vin Cent Su,Yi Chieh Lai,Mu Ku Chen,Hsin Yu Kuo,Bo Han Chen,Yu Han Chen,Tzu-Ting Huang,Jung Hsi Wang,Ray-Ming Lin,Chieh-Hsiung Kuan,Tao Li,Zhenlin Wang,Shining Zhu,Din Ping Tsai,Din Ping Tsai,Din Ping Tsai +17 more
TL;DR: Integrating the Pancharatnam–Berry phase with integrated resonant nanoantennas in a metalens design produces an achromatic device capable of full-colour imaging in the visible range in transmission mode.
Journal ArticleDOI
Electromagnetic reprogrammable coding-metasurface holograms.
Lianlin Li,Tie Jun Cui,Wei Ji,Shuo Liu,Jun Ding,Xiang Wan,Yun Bo Li,Menghua Jiang,Cheng-Wei Qiu,Cheng-Wei Qiu,Shuang Zhang +10 more
TL;DR: The proposed reprogrammable hologram may be a key in enabling future intelligent devices with reconfigurable and programmable functionalities that may lead to advances in a variety of applications such as microscopy, display, security, data storage, and information processing.
Journal ArticleDOI
Subwavelength integrated photonics.
TL;DR: How optical metamaterials are expected to enhance the performance of the next generation of integrated photonic devices is reviewed, and some of the challenges encountered in the transition from concept demonstration to viable technology are explored.
Journal ArticleDOI
Spatiotemporal light control with active metasurfaces
TL;DR: What is required to create high-performance spatiotemporal metasurfaces is discussed and what new applications and physics they have to offer are analyzed.
Journal ArticleDOI
Fundamentals and Applications of Metasurfaces
TL;DR: Metasurfaces have become a rapidly growing field of research in recent years due to their exceptional abilities in light manipulation and versatility in ultrathin optical applications and are promising for integration with on-chip nanophotonic devices owing to their planar profiles.
References
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Light Propagation with Phase Discontinuities: Generalized Laws of Reflection and Refraction
Nanfang Yu,Patrice Genevet,Patrice Genevet,Mikhail A. Kats,Francesco Aieta,Francesco Aieta,Jean-Philippe Tetienne,Jean-Philippe Tetienne,Federico Capasso,Zeno Gaburro,Zeno Gaburro +10 more
TL;DR: In this article, a two-dimensional array of optical resonators with spatially varying phase response and subwavelength separation can imprint phase discontinuities on propagating light as it traverses the interface between two media.
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Flat Optics With Designer Metasurfaces
Nanfang Yu,Federico Capasso +1 more
TL;DR: This Review focuses on recent developments on flat, ultrathin optical components dubbed 'metasurfaces' that produce abrupt changes over the scale of the free-space wavelength in the phase, amplitude and/or polarization of a light beam.
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Planar Photonics with Metasurfaces
TL;DR: Progress in the optics of metasurfaces is reviewed and promising applications for surface-confined planar photonics components are discussed and the studies of new, low-loss, tunable plasmonic materials—such as transparent conducting oxides and intermetallics—that can be used as building blocks for metAsurfaces will complement the exploration of smart designs and advanced switching capabilities.
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Metasurface holograms reaching 80% efficiency
TL;DR: The design of the hologram integrates a ground metal plane with a geometric metasurface that enhances the conversion efficiency between the two circular polarization states, leading to high diffraction efficiency without complicating the fabrication process.
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Dielectric gradient metasurface optical elements.
TL;DR: The experimental realization and operation of dielectric gradient metasurface optical elements capable of also achieving high efficiencies in transmission mode in the visible spectrum are described.