Results 61 to 70 of about 3,540,237 (277)

Computation‐Less, Bias‐Free, and Ultra‐Broadband Photodetector for On‐Chip Edge Extraction

Advanced Materials, EarlyView.
A computation‐less, bias‐free, and ultra‐broadband photodetector directly converts local optical‐intensity gradients into signed photocurrents through a position‐dependent bi‐directional photoresponse. This intrinsic physical sensing mechanism enables single‐pixel edge extraction from the near‐infrared to the long‐wave infrared at room temperature ...
Jintao Fu, Hao Jiang, Xingsi Liu, Fakun Wang, Yang Peng, Qi Jie Wang, Weibo Gao, Xingzhan Wei, Cheng‐Wei Qiu   +8 more
wiley   +1 more source

The Focusing Property of Immersed Plasmonic Nanolenses Under Radially Polarized Illumination

IEEE Photonics Journal, 2013
The focusing property of immersed plasmonic nanolenses was theoretically studied by a rigorous electromagnetic numerical analysis method. The immersed plasmonic nanolens consists of a through central hole surrounded by a set of concentric slits with a ...
Er-Wei Wang, Ling-Li Li, Wei-Xing Yu, Tai-Sheng Wang, Jin-Song Gao, Yong-Qi Fu, Yu-Ling Liu   +6 more
doaj   +1 more source

Asymmetric transmission in nanophotonics

Nanophotonics, 2023
In a reciprocal medium, transmission of electromagnetic (EM) waves is symmetric along opposite directions which restrict design and implementation of various systems in optics and photonics.
Sheikh Ansari Abbas, Iyer Ashwin K., Gholipour Behrad   +2 more
doaj   +1 more source

Field Structures and Singularities in Subwavelength Optics

Vestnik Moskovskogo Universiteta, Seriya 3: Fizika, Astronomiya
A brief overview of the current state of the problem of electromagnetic field singularities arising from the refraction and scattering of light by material objects is given. The discussion begins with caustics arising from ray tracing in geometric optics and consistently moves toward increasing the accuracy of consideration and decreasing the scale ...
Tribelsky, M. I., Luk'yanchuk, B. S.
openaire   +2 more sources

Photoluminescence Reshaping via Structural Confinement and Local Density of Optical States Control in Ir(III)‐Doped Biodegradable Metasurfaces

Advanced Materials Technologies, EarlyView.
Phosphorescent biodegradable metasurface showing vibronic selection and spectral photoluminescence narrowing. Anti‐correlation between experimental LDOS and measured lifetimes. ABSTRACT Metasurfaces incorporating phosphorescent emitters offer a route to engineer radiative and vibronic processes beyond chemical design.
Vincenzo Caligiuri, Andrea Smeriglio, Svetlana Siprova, Olga Favale, Francesca Leone, Roberto Termine, Debora Policastro, Alessandra Crispini, Attilio Golemme, Nicolas Godbert, Iolinda Aiello, Antonio De Luca   +11 more
wiley   +1 more source

Stochastic subwavelength structures on polymer surfaces for antireflection purposes

, 2022
Subwavelength structures of sufficient height are capable to reduce the Fresnel reflection of surfaces. A new technique is presented to produce stochastic structures on polymer surfaces by low-pressure plasma-ion treatment, showing excellent broadband ...
Leitel, R., Munzert, P., Wendling, I., Schulz, U., Tünnermann, A., Kaiser, N.   +5 more
core   +1 more source

Unlocking Terahertz Steganography: Authentication of Hidden Images in Flexible Media

Advanced Materials Technologies, EarlyView.
Hidden information in multilayered devices, such as steganographic portraits, is detected and authenticated using reflection‐mode terahertz time‐domain imaging. Image reconstruction relies on a dedicated figure‐of‐merit obtained by integrating the signal intensity over the time‐window associated with the reflection from the metallic mirror backing the ...
Tiziana Ritacco, Francesca Vittorioso, Dimitrios C. Zografopoulos, Romeo Beccherelli, Walter Fuscaldo   +4 more
wiley   +1 more source

Large‐Area Flat Optics Color Routing in Tilted Arrays of 2D Semiconductor Nanostripes

Advanced Optical Materials, EarlyView.
We develop a scalable flat optics platform exploiting self‐organised ion‐beam sputtering and maskless glancing‐angle deposition to fabricate centimetre‐scale arrays of tilted MoS2 nanostripes. The engineered geometry activates Rayleigh anomalies, guided modes, and Mie resonances, enabling highly directional color routing and enhanced light harvesting ...
Simone Di Marco, Daniele Ceneda, Matteo Barelli, Matteo Gardella, Rajesh Chennuboina, Maria C. Giordano, Marco Centini, Francesco Buatier de Mongeot   +7 more
wiley   +1 more source

Guided-Mode Resonances in GaN Membrane Grating

IEEE Photonics Journal, 2014
This paper proposes guided-mode resonant GaN grating that are implemented on a GaN-on-silicon wafer structure. Numerical simulations based on rigorous coupled wave analysis (RCWA) are performed to model multiple resonances in thick GaN membranes.
Zheng Shi, Xumin Gao, Xin Li, Fangren Hu, Martin Lopez-Garcia, Martin J. Cryan, Hongbo Zhu, Yongjin Wang   +7 more
doaj   +1 more source

Generalized Honeycomb-Structured Materials in the Subwavelength Regime

SIAM Journal on Applied Mathematics
23 pages, 4 figures.
Borui Miao, Yi Zhu 0010
openaire   +2 more sources