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View article: Dynamic Hyperspectral Holography Enabled by Inverse‐Designed Metasurfaces with Oblique Helicoidal Cholesterics
Dynamic Hyperspectral Holography Enabled by Inverse‐Designed Metasurfaces with Oblique Helicoidal Cholesterics Open
Metasurfaces are flat arrays of nanostructures that allow exquisite control of phase and amplitude of incident light. Although metasurfaces offer new active element for both fundamental science and applications, the challenge still remains…
View article: Radiative Cooling for Energy Sustainability: From Fundamentals to Fabrication Methods Toward Commercialization
Radiative Cooling for Energy Sustainability: From Fundamentals to Fabrication Methods Toward Commercialization Open
Radiative cooling, a technology that lowers the temperature of terrestrial objects by dissipating heat into outer space, presents a promising ecologically‐benign solution for sustainable cooling. Recent years witness substantial progress i…
View article: Multicolor and 3D holography realized by inverse design of single-celled metasurfaces
Multicolor and 3D holography realized by inverse design of single-celled metasurfaces Open
Metasurface-generated holography has emerged as a promising route for fully reproducing vivid scenes by manipulating the optical properties of light using ultra-compact devices. However, achieving multiple holographic images using a single…
View article: Deep learning for topological photonics
Deep learning for topological photonics Open
In this paper, we review the specific field that combines topological photonics and deep learning (DL). Recent progress of topological photonics has attracted enormous interest for its novel and exotic properties such as unidirectional pro…
View article: Hyperbolic metamaterials: fusing artificial structures to natural 2D materials
Hyperbolic metamaterials: fusing artificial structures to natural 2D materials Open
Optical metamaterials have presented an innovative method of manipulating light. Hyperbolic metamaterials have an extremely high anisotropy with a hyperbolic dispersion relation. They are able to support high- k modes and exhibit a high de…
View article: Highly suppressed solar absorption in a daytime radiative cooler designed by genetic algorithm
Highly suppressed solar absorption in a daytime radiative cooler designed by genetic algorithm Open
Here, we report a selective multilayer emitter for eco-friendly daytime passive radiative cooling. The types of materials and thickness of up to 10 layers of the multilayer structure are optimized by a genetic algorithm. The passive radiat…
View article: Experimental demonstration of broadband negative refraction at visible frequencies by critical layer thickness analysis in a vertical hyperbolic metamaterial
Experimental demonstration of broadband negative refraction at visible frequencies by critical layer thickness analysis in a vertical hyperbolic metamaterial Open
This work presents a vertical hyperbolic metamaterial (vHMM) consisting of a vertically stacked metal-dielectric multilayer that operates in the visible spectrum. The vHMM is designed by exploiting the relation between negative refraction …
View article: Design of a transmissive metasurface antenna using deep neural networks
Design of a transmissive metasurface antenna using deep neural networks Open
This article presents design methods for a transmissive metasurface antenna composed of four layers of meta-structures based on the deep neural network (DNN). Owing to the structural complexity as well as side effects such as couplings amo…
View article: Inverse design of ultra-narrowband selective thermal emitters designed by artificial neural networks
Inverse design of ultra-narrowband selective thermal emitters designed by artificial neural networks Open
The inverse design of photonic devices through the training of artificial neural networks (ANNs) has been proven as an invaluable tool for researchers to uncover interesting structures and designs that produce optical devices with enhanced…
View article: Describing Meta-Atoms Using the Exact Higher-Order Polarizability Tensors
Describing Meta-Atoms Using the Exact Higher-Order Polarizability Tensors Open
In nanophotonics, multipole framework has become an indispensable theoretical tool for analyzing subwavelength meta-atoms and their radiation properties. This work presents higher-order exact dynamic polarizability (alpha) tensors, which c…
View article: New trends in nanophotonics
New trends in nanophotonics Open
Nanophotonics considers the complex interactions between light and matter at the sub-wavelength scale.Recent progress in nanophotonics has revealed unprecedented optical phenomena, which have opened up the novel and rapidly developing fiel…
View article: Optical characterizations and thermal analyses of HfO<sub>2</sub>/SiO<sub>2</sub> multilayered diffraction gratings for high-power continuous wave laser
Optical characterizations and thermal analyses of HfO<sub>2</sub>/SiO<sub>2</sub> multilayered diffraction gratings for high-power continuous wave laser Open
Spectral beam combining technique is a simple and straightforward method to obtain a high-power laser beam. The beam combining system typically consists of three parts: fiber laser array, transform optical system and diffraction grating. P…
View article: Deep learning enabled inverse design in nanophotonics
Deep learning enabled inverse design in nanophotonics Open
Deep learning has become the dominant approach in artificial intelligence to solve complex data-driven problems. Originally applied almost exclusively in computer-science areas such as image analysis and nature language processing, deep le…
View article: Designing nanophotonic structures using conditional deep convolutional generative adversarial networks
Designing nanophotonic structures using conditional deep convolutional generative adversarial networks Open
Data-driven design approaches based on deep learning have been introduced in nanophotonics to reduce time-consuming iterative simulations, which have been a major challenge. Here, we report the first use of conditional deep convolutional g…
View article: Simultaneous inverse design of materials and parameters of core-shell nanoparticle via deep-learning: Demonstration of dipole resonance engineering
Simultaneous inverse design of materials and parameters of core-shell nanoparticle via deep-learning: Demonstration of dipole resonance engineering Open
Recent introduction of data-driven approaches based on deep-learning technology has revolutionized the field of nanophotonics by allowing efficient inverse design methods. In this paper, simultaneous inverse design of materials and structu…
View article: Designing nanophotonic structures using conditional-deep convolutional generative adversarial networks
Designing nanophotonic structures using conditional-deep convolutional generative adversarial networks Open
Data-driven design approaches based on deep-learning have been introduced in nanophotonics to reduce time-consuming iterative simulations which have been a major challenge. Here, we report the first use of conditional deep convolutional ge…
View article: Noninvasive monitoring of x-ray beam at a windowless undulator beamline using x-ray induced drain current of a focusing mirror
Noninvasive monitoring of x-ray beam at a windowless undulator beamline using x-ray induced drain current of a focusing mirror Open
An x-ray induced electric current of an x-ray mirror (drain current) was measured as a function of the incident x-ray photon flux and the mirror angle at the Soft Matter Interfaces (SMI) beamline at NSLS-11. The mirror was a horizontal foc…
View article: Thermally robust ring-shaped chromium perfect absorber of visible light
Thermally robust ring-shaped chromium perfect absorber of visible light Open
A number of light-absorbing devices based on plasmonic materials have been reported, and their device efficiencies (or absorption) are high enough to be used in real-life applications. Many light-absorbing applications such as thermophotov…
View article: Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging
Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging Open
The use of super-resolution imaging to overcome the diffraction limit of conventional microscopy has attracted the interest of researchers in biology and nanotechnology. Although near-field scanning microscopy and superlenses have improved…
View article: Deep sub-wavelength nanofocusing of UV-visible light by hyperbolic metamaterials
Deep sub-wavelength nanofocusing of UV-visible light by hyperbolic metamaterials Open
Confining light into a sub-wavelength area has been challenging due to the natural phenomenon of diffraction. In this paper, we report deep sub-wavelength focusing via dispersion engineering based on hyperbolic metamaterials. Hyperbolic me…