Transformation-Optics-Designed Plasmonic Singularities for Efficient Photocatalytic Hydrogen Evolution at Metal/Semiconductor Interfaces.
Sign Up to like & getrecommendations! Published in 2023 at "Nano letters"
DOI: 10.1021/acs.nanolett.3c01287
Abstract: Inspired by transformation optics, we propose a new concept for plasmonic photocatalysis by creating a novel hybrid nanostructure with a plasmonic singularity. Our geometry enables broad and strong spectral light harvesting at the active site… read more here.
Keywords: transformation optics; semiconductor; optics; czts ... See more keywords
Controlling lightwave in Riemann space by merging geometrical optics with transformation optics
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-19015-0
Abstract: In geometrical optical design, we only need to choose a suitable combination of lenses, prims, and mirrors to design an optical path. It is a simple and classic method for engineers. However, people cannot design… read more here.
Keywords: geometrical optics; transformation optics; method; optics ... See more keywords
Broadband wide-angle terahertz antenna based on the application of transformation optics to a Luneburg lens
Sign Up to like & getrecommendations! Published in 2021 at "Scientific Reports"
DOI: 10.1038/s41598-021-84849-8
Abstract: The design of antennas for terahertz systems remains a significant challenge. These antennas must provide very high gain to overcome significant free-space path loss, which limits their ability to broadcast or receive a beam over… read more here.
Keywords: wide angle; luneburg lens; transformation optics; optics ... See more keywords
Designing Devices for Wave-Vector Manipulation Using a Transformation-Optics Approach
Sign Up to like & getrecommendations! Published in 2017 at "Physical review applied"
DOI: 10.1103/physrevapplied.8.014005
Abstract: A transformation optics approach was used to derive a general method for designing electromagnetic devices able to manipulate the wave vectors in the specific manner required by the functionality of the device. While the wave… read more here.
Keywords: transformation optics; transformation; optics; devices wave ... See more keywords
Transformation optics approach to singular metasurfaces
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.98.125409
Abstract: Surface plasmons dominate the optical response of metal surfaces, and their nature is controlled by surface geometry. Here we study metasurfaces containing singularities in the form of sharp edges and characterized by three quantum numbers… read more here.
Keywords: transformation optics; approach singular; surface; optics ... See more keywords
A Novel Transformation Optics-Based FDTD Algorithm for Fast Electromagnetic Analysis of Small Structures in a Large Scope
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Access"
DOI: 10.1109/access.2019.2938615
Abstract: In this paper, we present a novel Transformation Optics based Finite-difference time-domain (TO-FDTD) algorithm with Square Transformed Region, which is suitable for fast electromagnetic analysis of small structures in a large computational domain. A small… read more here.
Keywords: transformed region; transformation optics; fdtd algorithm; optics ... See more keywords
Wide-Angle Ceramic Retroreflective Luneburg Lens based on Quasi-Conformal Transformation Optics for mm-Wave Indoor Localization
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3166509
Abstract: This paper presents a quasi-conformal transformation optics (QCTO) based three-dimensional (3D) retroreflective flattened Luneburg lens for wide-angle millimeter-wave radio-frequency indoor localization. The maximum detection angle and radar cross-section (RCS) are investigated, including an impedance matching… read more here.
Keywords: transformation optics; conformal transformation; optics; wide angle ... See more keywords
Transformation-Optics-Based Design of a Metamaterial Radome for Extending the Scanning Angle of a Phased-Array Antenna
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Journal on Multiscale and Multiphysics Computational Techniques"
DOI: 10.1109/jmmct.2017.2713826
Abstract: We apply the transformation-optics approach to the design of a metamaterial radome that can extend the scanning angle of a phased-array antenna. For moderate enhancement of the scanning angle, via suitable parameterization and optimization of… read more here.
Keywords: transformation optics; design metamaterial; optics; scanning angle ... See more keywords
Transformation optics based on unitary vectors and Fermat's principle for arbitrary spatial transformation design.
Sign Up to like & getrecommendations! Published in 2018 at "Applied optics"
DOI: 10.1364/ao.57.008632
Abstract: A methodology of designing an arbitrary transformation using transformation optics (TO) based on unitary vectors and Fermat's principle is presented. The TO equation is derived in terms of grid coordinates. The geometry of the transformed… read more here.
Keywords: based unitary; transformation optics; transformation; optics ... See more keywords
Three-dimensional transformation optics for arbitrary coordinate systems: transforming conductive materials and boundaries.
Sign Up to like & getrecommendations! Published in 2018 at "Optics express"
DOI: 10.1364/oe.26.010462
Abstract: A three-dimensional transformation optics method, leading to homogeneous materials, applicable to any non-Cartesian coordinate systems or waveguides/objects of arbitrary cross-sections is presented. Both the conductive boundary and internal material of the desired device is determined… read more here.
Keywords: three dimensional; coordinate systems; transformation optics; dimensional transformation ... See more keywords
Conformal optical devices based on geodesic lenses.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.028722
Abstract: Conformal transformation optics provides a simple scheme for manipulating light rays with inhomogeneous isotropic dielectrics. However, there is usually discontinuity for refractive index profile at branch cuts of different virtual Riemann sheets, hence compromising the… read more here.
Keywords: conformal optical; transformation optics; geodesic lenses; optics ... See more keywords