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View article: A Van der Waals Material Exhibiting Room Temperature Broken Inversion Symmetry with Ferroelectricity
A Van der Waals Material Exhibiting Room Temperature Broken Inversion Symmetry with Ferroelectricity Open
Since the initial synthesis of van der Waals 2D indium selenide is first documented in 1957, five distinct polymorphs and their corresponding polytypes are identified. In this study, a unique phase of indium selenide is reported via Scanni…
View article: A van der Waals material exhibiting room temperature broken inversion symmetry with ferroelectricity
A van der Waals material exhibiting room temperature broken inversion symmetry with ferroelectricity Open
Since the initial synthesis of van der Waals two-dimensional indium selenide was first documented in 1957, five distinct polymorphs and their corresponding polytypes have been identified. In this study, we report a unique phase of indium s…
View article: Machine-learning-assisted photonic device development: a multiscale approach from theory to characterization
Machine-learning-assisted photonic device development: a multiscale approach from theory to characterization Open
Photonic device development (PDD) has achieved remarkable success in designing and implementing new devices for controlling light across various wavelengths, scales, and applications, including telecommunications, imaging, sensing, and qua…
View article: Ion-Assisted Nanoscale Material Engineering in Atomic Layers
Ion-Assisted Nanoscale Material Engineering in Atomic Layers Open
Achieving deterministic control over the properties of low-dimensional materials with nanoscale precision is a long-sought goal. Mastering this capability has a transformative effect on the design of multifunctional electrical and optical …
View article: Plasmonics and optical metastructures
Plasmonics and optical metastructures Open
Plasmonics and optical metastructures represent cutting-edge frontiers in nanophotonics, enabling on-demand control of light at the subwavelength scale. This special topic of the Journal of Applied Physics highlights the recent advancement…
View article: Ion-Assisted Nanoscale Material Engineering in Atomic Layers
Ion-Assisted Nanoscale Material Engineering in Atomic Layers Open
Achieving deterministic control over the properties of low-dimensional materials with nanoscale precision is a long-sought goal. Mastering this capability has a transformative impact on the design of multifunctional electrical and optical …
View article: Exploring the synergy between hot-electron dynamics and active plasmonics: A perspective
Exploring the synergy between hot-electron dynamics and active plasmonics: A perspective Open
Physical processes involving hot electrons, including their generation, transport, injection, and relaxation, have been an extensive area of research. The most widely utilized method for actuating the creation of hot electrons involves the…
View article: Phototransformation of achiral metasurfaces into handedness-selectable transient chiral media
Phototransformation of achiral metasurfaces into handedness-selectable transient chiral media Open
Chirality is a geometric property describing the lack of mirror symmetry. This unique feature enables photonic spin-selectivity in light–matter interaction, which is of great significance in stereochemistry, drug development, quantum optic…
View article: Tailoring full-Stokes thermal emission from twisted-gratings structures
Tailoring full-Stokes thermal emission from twisted-gratings structures Open
Polarized thermal emission finds extensive applications in remote sensing, landmine detection, and target detection. In applications such as ellipsometry and biomedical analysis, the generation of emission with controllable polarization is…
View article: Design of multifunctional color routers with Kerker switching using generative adversarial networks
Design of multifunctional color routers with Kerker switching using generative adversarial networks Open
To achieve optoelectronic devices with high resolution and efficiency, there is a pressing need for optical structural units that possess an ultrasmall footprint yet exhibit strong controllability in both the frequency and spatial domains.…
View article: Optical Synthesis of Transient Chirality in Achiral Plasmonic Metasurfaces
Optical Synthesis of Transient Chirality in Achiral Plasmonic Metasurfaces Open
As much as chiral metasurfaces are significant in stereochemistry and polarization control, tunable chiroptical response is important for their dynamic counterparts. A single metasurface device with invertible chiral states can selectively…
View article: Tailored Dispersion of Spectro‐Temporal Dynamics in Hot‐Carrier Plasmonics
Tailored Dispersion of Spectro‐Temporal Dynamics in Hot‐Carrier Plasmonics Open
Ultrafast optical switching in plasmonic platforms relies on the third‐order Kerr nonlinearity, which is tightly linked to the dynamics of hot carriers in nanostructured metals. Although extensively utilized, a fundamental understanding on…
View article: INTERPRETATION AND DETERMINATION OF MUELLER MATRIX USING PARTIAL POLARIMETRY
INTERPRETATION AND DETERMINATION OF MUELLER MATRIX USING PARTIAL POLARIMETRY Open
Mueller matrices relate Stokes parameters of the incident and the emerging light, after interaction with an object (or a medium), and carry information about diattenuation, retardance, and depolarization. Determining all 4 × 4 Mueller matr…
View article: Polarimetric analysis of thermal emission from both reciprocal and nonreciprocal materials using fluctuational electrodynamics
Polarimetric analysis of thermal emission from both reciprocal and nonreciprocal materials using fluctuational electrodynamics Open
Coherent thermal emission for a given polarization has been observed in many metamaterials with micro/nanostructures. A complete description of the thermal emission requires the full characterization of the spectral angular emissivity for …
View article: Artificial Intelligence Meets Engineered Photonic Materials: introduction to special issue
Artificial Intelligence Meets Engineered Photonic Materials: introduction to special issue Open
This is an introduction to the feature issue of Optical Materials Express on Artificial Intelligence Meets Engineered Photonic Materials .
View article: Fast Non-line-of-sight Imaging with Two-step Deep Remapping
Fast Non-line-of-sight Imaging with Two-step Deep Remapping Open
Conventional imaging only records photons directly sent from the object to the detector, while non-line-of-sight (NLOS) imaging takes the indirect light into account. Most NLOS solutions employ a transient scanning process, followed by a p…
View article: Dynamic Hybrid Metasurfaces
Dynamic Hybrid Metasurfaces Open
Efficient hybrid plasmonic-photonic metasurfaces that simultaneously take advantage of the potential of both pure metallic and all-dielectric nanoantennas are identified as an emerging technology in flat optics. Nevertheless, postfabricati…
View article: Tackling Photonic Inverse Design with Machine Learning
Tackling Photonic Inverse Design with Machine Learning Open
Machine learning, as a study of algorithms that automate prediction and decision‐making based on complex data, has become one of the most effective tools in the study of artificial intelligence. In recent years, scientific communities have…
View article: Electrically driven programmable phase-change meta-switch reaching 80% efficiency
Electrically driven programmable phase-change meta-switch reaching 80% efficiency Open
Despite recent advances in active metaoptics, wide dynamic range combined with high-speed reconfigurable solutions is still elusive. Phase-change materials (PCMs) offer a compelling platform for metasurface optical elements, owing to the l…
View article: Multifunctional Meta-Optic Systems: Inversely Designed with Artificial Intelligence
Multifunctional Meta-Optic Systems: Inversely Designed with Artificial Intelligence Open
Flat optics foresees a new era of ultra-compact optical devices, where metasurfaces serve as the foundation. Conventional designs of metasurfaces start with a certain structure as the prototype, followed by an extensive parametric sweep to…
View article: Topological encoding method for data-driven photonics inverse design
Topological encoding method for data-driven photonics inverse design Open
Data-driven approaches have been proposed as effective strategies for the inverse design and optimization of photonic structures in recent years. In order to assist data-driven methods for the design of topology of photonic devices, we pro…
View article: Photocarrier‐Induced Active Control of Second‐Order Optical Nonlinearity in Monolayer MoS<sub>2</sub>
Photocarrier‐Induced Active Control of Second‐Order Optical Nonlinearity in Monolayer MoS<sub>2</sub> Open
Atomically thin transition metal dichalcogenides (TMDs) in their excited states can serve as exceptionally small building blocks for active optical platforms. In this scheme, optical excitation provides a practical approach to control ligh…
View article: Transient Second-Order Nonlinear Media: Breaking the Spatial Symmetry in the Time Domain via Hot-Electron Transfer
Transient Second-Order Nonlinear Media: Breaking the Spatial Symmetry in the Time Domain via Hot-Electron Transfer Open
Second-order optical effects are essential to the active control of light and the generation of new spectral components. The inversion symmetry, however, prevents achieving a bulk χ^{(2)} response, limiting the portfolio of the second-orde…
View article: Compounding meta-atoms into meta-molecules with hybrid artificial intelligence techniques
Compounding meta-atoms into meta-molecules with hybrid artificial intelligence techniques Open
Molecules composed of atoms exhibit properties not inherent to their constituent atoms. Similarly, meta-molecules consisting of multiple meta-atoms possess emerging features that the meta-atoms themselves do not possess. Metasurfaces compo…