Diffraction efficiency
View article: Experimental demonstration of optical energy transfer between the 0th and -1st orders diffracted by an all-dielectric resonant waveguide grating
Experimental demonstration of optical energy transfer between the 0th and -1st orders diffracted by an all-dielectric resonant waveguide grating Open
The energy transfer between the reflected 0th and -1st orders diffracted by a grating in the vicinity of the Littrow angle is experimentally demonstrated for the first time with an all-dielectric resonant waveguide grating under TE polariz…
View article: Design and fabrication of liquid crystal optical phased arrays with wide deflection angle
Design and fabrication of liquid crystal optical phased arrays with wide deflection angle Open
Liquid crystal optical phased array (LCOPA) is a beam deflection technology based on devices such as liquid crystal spatial light modulators and liquid crystal polarization gratings to achieve precise angular control. Compared with mechani…
View article: Simulation and Preparation of Two-Dimensional Polymer-Dispersed Liquid Crystal Gratings via Holographic Multi-Beam Interference
Simulation and Preparation of Two-Dimensional Polymer-Dispersed Liquid Crystal Gratings via Holographic Multi-Beam Interference Open
Polymer-dispersed liquid crystal (PDLC) gratings, as an emerging optical material, offer significant advantages such as low fabrication cost, suitability for large-area processing, and rapid electro-optic response. They show great potentia…
View article: Integrated High Rejection Ratio Pump Filter Using an Optimized Waveguide Bragg Grating
Integrated High Rejection Ratio Pump Filter Using an Optimized Waveguide Bragg Grating Open
View article: Research on energy compensation characteristics of beam deflection structure based on liquid crystal polarization grating
Research on energy compensation characteristics of beam deflection structure based on liquid crystal polarization grating Open
Growing demand for beam deflection technologies featuring wide angular range and high diffraction efficiency necessitates a quantitative analysis of the energy compensation mechanisms of the 2D beam deflection structure that account for az…
View article: Measurements and modeling of high groove density multilayer gratings for EUV spectral range in classical and conical mountings
Measurements and modeling of high groove density multilayer gratings for EUV spectral range in classical and conical mountings Open
In this work, we study high groove density gratings coated with periodic or aperiodic multilayers, focusing on their extreme ultraviolet performance in both classical and conical diffraction geometries. We first analyze the evolution of th…
View article: Influence of Driving Pulse Properties on Third-Harmonic Diffraction from Quasi-BIC Metasurfaces
Influence of Driving Pulse Properties on Third-Harmonic Diffraction from Quasi-BIC Metasurfaces Open
View article: Photopatterned surface polymer-stabilized alignment (SPSA) for tunable liquid crystal long-period fiber gratings in hollow core fibers: A novel fabrication strategy inspired by SPSA
Photopatterned surface polymer-stabilized alignment (SPSA) for tunable liquid crystal long-period fiber gratings in hollow core fibers: A novel fabrication strategy inspired by SPSA Open
A novel and straightforward method for fabricating liquid crystal-based long-period fiber gratings (LC-LPFGs) was developed by employing a surface polymer-stabilized alignment (SPSA) technique in conjunction with a binary grating photomask…
View article: Third Harmonic Upconverted Full-Stokes Imaging with High-Efficiency Germanium Metasurface from MWIR to SWIR
Third Harmonic Upconverted Full-Stokes Imaging with High-Efficiency Germanium Metasurface from MWIR to SWIR Open
Dielectric resonant metasurfaces can be utilized for efficient high harmonic generation, which has been explored here in this effort for a high-efficient Germanium metasurface for upconverted full-Stokes imaging at 1.33-micron wavelength b…
View article: Third Harmonic Upconverted Full-Stokes Imaging with High-Efficiency Germanium Metasurface from MWIR to SWIR
Third Harmonic Upconverted Full-Stokes Imaging with High-Efficiency Germanium Metasurface from MWIR to SWIR Open
Dielectric resonant metasurfaces can be utilized for efficient high harmonic generation, which has been explored here in this effort for a high-efficient Germanium metasurface for upconverted full-Stokes imaging at 1.33-micron wavelength b…
View article: Entropy mode driven gas optics
Entropy mode driven gas optics Open
We propose a novel class of gaseous diffractive optical elements created by imprinting an entropy mode in a gas. Previous approaches to gaseous diffractive optics relied on the simultaneous excitation of a standing acoustic wave and an ent…
View article: Entropy mode driven gas optics
Entropy mode driven gas optics Open
We propose a novel class of gaseous diffractive optical elements created by imprinting an entropy mode in a gas. Previous approaches to gaseous diffractive optics relied on the simultaneous excitation of a standing acoustic wave and an ent…
View article: An update of progress on the design of the diffraction line for the relativistic ultrafast electron diffraction and imaging facility at Daresbury Laboratory
An update of progress on the design of the diffraction line for the relativistic ultrafast electron diffraction and imaging facility at Daresbury Laboratory Open
The Relativistic Ultrafast Electron Diffraction and Imaging (RUEDI) facility is an approved project to provide ultrafast capability to UK researchers. The current design involves two separate beamlines for diffraction and imaging but with …
View article: Modelling of Tiled Grating Arrangement Efficiency
Modelling of Tiled Grating Arrangement Efficiency Open
The precise alignment of individual diffraction grating units within a tiled grating assembly (TGA) is essential for enhancing the quality of optical throughput and overall functional performance of such kinds of optical systems. This stud…
View article: Spectral filtering effect of diffraction gratings with a lens coupling to optical fibers
Spectral filtering effect of diffraction gratings with a lens coupling to optical fibers Open
We present a theoretical study of a spectral filter, which consists of a diffraction grating, a coupling lens, and an optical fiber. As the diffracted beam is highly dispersed spatially, coupling into an optical fiber naturally creates a G…
View article: Enhancing Diffraction Efficiency in Polarization Volume Gratings via Polymer‐Stabilized Cholesteric Liquid Crystal Bilayers
Enhancing Diffraction Efficiency in Polarization Volume Gratings via Polymer‐Stabilized Cholesteric Liquid Crystal Bilayers Open
Polarization volume gratings (PVGs), formed using patterned cholesteric liquid crystals (CLCs), offer high diffraction efficiency, polarization selectivity, and broad angular bandwidth—making them ideal for advanced photonic applications. …
View article: Design of highly efficient wideband multilayer coated blazed gratings providing constant <i>C<sub>ff</sub></i>-factor or deviation angle in the tender X-ray region
Design of highly efficient wideband multilayer coated blazed gratings providing constant <i>C<sub>ff</sub></i>-factor or deviation angle in the tender X-ray region Open
The universal approach was originally developed to design wideband multilayer coated blazed gratings operating in the tender X-ray region ( E = 2-3 keV), realizing different diffraction geometries including constant incidence angle, consta…
View article: On-chip diffractive optical neural network based on binary metasurfaces
On-chip diffractive optical neural network based on binary metasurfaces Open
This paper proposes and investigates an on-chip diffractive optical neural network based on binary metasurfaces. The genetic algorithm and finite-difference time-domain method are used to optimize the binary metasurfaces to achieve relativ…
View article: High-efficiency metal surface grating gain coupled distributed feedback semiconductor laser
High-efficiency metal surface grating gain coupled distributed feedback semiconductor laser Open
This study demonstrates a pure gain coupling laser achieved through periodic injection using a metal surface grating. To enhance both the gain contrast and the grating coupling factor, the grating coverage width was optimized to 20 µm. Unl…
View article: Buried volume holograms fabricated by two-photon polymerization
Buried volume holograms fabricated by two-photon polymerization Open
Computer generated volume holograms (CGVHs) are optical elements designed to manipulate light for desired optical functionalities. Two-photon polymerization (2PP) lithography offers a straightforward fabrication method for such CGVHs. Howe…
View article: Sub-diffraction limited focusing with quasi-periodic photonic crystal multilayers
Sub-diffraction limited focusing with quasi-periodic photonic crystal multilayers Open
Direct writing lithography plays a crucial role in the fabrication of arbitrary nano-patterns. In order to improve the resolution, a quasi-periodic photonic crystal (QPC) multilayer structure is proposed for manipulating the evanescent wav…
View article: High-efficiency and eco-friendly Cs<sub>2</sub>SnBr<sub>6</sub>-based perovskite solar cells: optimized device architecture and performance analysis via SCAPS-1D simulation
High-efficiency and eco-friendly Cs<sub>2</sub>SnBr<sub>6</sub>-based perovskite solar cells: optimized device architecture and performance analysis via SCAPS-1D simulation Open
This study aims to develop a sustainable, high-efficiency Cs 2 SnBr 6 -based perovskite solar cell (PSC) while eliminating the use of hazardous materials. The proposed device architecture Al/FTO/CdS/Cs 2 SnBr 6 /CBTS/Ni (Device I) demonstr…
View article: A Switchable and Rotatable Chiral Nematic Liquid Crystal Diffraction Grating for Beam‐Steering Technology
A Switchable and Rotatable Chiral Nematic Liquid Crystal Diffraction Grating for Beam‐Steering Technology Open
This paper presents a switchable and rotatable chiral nematic liquid crystal (LC) diffraction grating that can be operated using low applied voltages at room temperature. A chiral nematic LC mixture is prepared such that the thickness ( d …
View article: Design and application of broadband and wide-angle double-layer diffractive optical element based on dual-objective optimization
Design and application of broadband and wide-angle double-layer diffractive optical element based on dual-objective optimization Open
This paper presents a dual-objective optimization method to tackle the low diffraction efficiency and high angular sensitivity of traditional double-layer diffractive optical elements (DLDOEs) in broadband and wide-angle scenarios. By deve…
View article: Design of broadband multilayer diffractive optical elements with multifocal imaging
Design of broadband multilayer diffractive optical elements with multifocal imaging Open
Multilayer diffractive optical elements (MLDOEs), due to their broadband optical properties, can be widely used in optical system design. However, MLDOEs only focus on one focal point, they cannot meet the requirement of broadband imaging …
View article: Far-zone properties of a partially coherent field diffracted by a grating
Far-zone properties of a partially coherent field diffracted by a grating Open
We study the diffraction of a partially coherent beam by a transmission grating. Both the state of coherence and the angular intensity distribution of the far-zone field are found to be dependent on the intensity width as well as the coher…
View article: Light-induced optical and nanostructural changes of Si gratings
Light-induced optical and nanostructural changes of Si gratings Open
In nanolithography, optical diffraction from gratings etched into the scribe lanes of semiconductor devices is used for wafer alignment. As these gratings become increasingly smaller, achieving sufficiently strong diffraction signals requi…
View article: Customized PVA/AA diffraction gratings by high repetition rate femtosecond direct laser writing
Customized PVA/AA diffraction gratings by high repetition rate femtosecond direct laser writing Open
In this work, we investigate the behavior of poly(vinyl alcohol)/acrylamide photopolymers (PVA/AA) under high repetition rate (1 kHz – 1 MHz), multipulse (1 – 20), femtosecond (450 fs) laser irradiation at λ=515 nm, varying fluence values …
View article: High-Efficiency Polarization-Independent LCoS Utilizing a Silicon-Based Metasurface
High-Efficiency Polarization-Independent LCoS Utilizing a Silicon-Based Metasurface Open
In this paper, we propose and demonstrate a liquid crystal on silicon (LCoS) device that achieves high-efficiency, broadband, polarization-independent phase modulation by integrating a metasurface between the liquid crystal layer and the b…
View article: Enhancing optical integration: One-step fabrication of multilevel and bifocal Fresnel diffractive microlenses with high focusing efficiency via two-photon polymerization
Enhancing optical integration: One-step fabrication of multilevel and bifocal Fresnel diffractive microlenses with high focusing efficiency via two-photon polymerization Open