Results 201 to 210 of about 1,363,311 (344)

From Invisible to Visible: Pressure‐Responsive Photonic Crystals for Advanced Information Encryption

open access: yesAdvanced Optical Materials, EarlyView.
Multilayered composite materials are fabricated based on chiral nematic cellulose nanocrystals incorporated in a shape‐memory polymer matrix. Upon hot‐pressing, they consistently present initially hidden patterns/information with structural colors distinct from the background over multiple pressing‐recovery cycles.
Zongzhe Li   +3 more
wiley   +1 more source

Micromachined Double‐Membrane Mechanically Tunable Metamaterial for Thermal Infrared Filtering

open access: yesAdvanced Photonics Research, Volume 6, Issue 5, May 2025.
Herein, a mechanically tunable double‐layer plasmonic metamaterial leveraging the extraordinary optical transmission effect observed in subwavelength arrays of openings within thin metal layers is presented. The concept is experimentally validated by integrating the proposed metamaterial structure into an electrostatic parallel‐plate actuator to create
Oleg Bannik   +7 more
wiley   +1 more source

A Trade‐Off between Pulse Energy and Stability in Seeded Free‐Electron Lasers

open access: yesAdvanced Photonics Research, EarlyView.
Seeded free‐electron lasers (FELs) require balancing competing factors for optimal performance. This work analyzes how dispersion strength influences output in high‐gain harmonic generation. Results reveal a trade‐off: maximizing pulse energy often comes at the cost of reduced stability and vice versa.
Li Zeng   +4 more
wiley   +1 more source

Exploring the Impact of the Emergency Department Built Environment on Physician Workplace Stress: A Qualitative Study Utilizing High-Fidelity Virtual Reality. [PDF]

open access: yesJ Am Coll Emerg Physicians Open
Fields JM   +12 more
europepmc   +1 more source

High‐Numerical‐Aperture, 3D‐Printed All‐Dielectric Harmonic Diffraction Metalens in the Sub‐THz Frequency Range

open access: yesAdvanced Photonics Research, EarlyView.
Herein, a compact all‐dielectric metalens operating at dual sub‐THz frequencies is presented, addressing key challenges in terahertz device miniaturization. Utilizing commercial 3D printing, the metalens achieves high numerical aperture and broadband functionality.
Kobi Ben Atar   +2 more
wiley   +1 more source

Nonvolatile and Low‐Loss Reconfigurable Optical Switches Using Sb2S3 Phase Change Material

open access: yesAdvanced Photonics Research, EarlyView.
Sb2S3‐assisted hybrid plasmonic waveguide‐based reconfigurable, nonvolatile 1 × 2 switch using an asymmetric directional coupler is presented. Its dual‐polarization functionality ensures its broader applicability and flexibility in integrated photonic systems where polarization diversity is often required.
Nisadur Rahman, Hasan Khaled Rouf
wiley   +1 more source

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