Results 91 to 100 of about 2,748 (191)

Hyperspectral tomographic diffractive microscopy: Development and applications

Journal of Microscopy, EarlyView.
Abstract Tomographic Diffractive Microscopy (TDM) provides label‐free three‐dimensional imaging of transparent samples with resolution surpassing confocal limits. At IRIMAS, successive instrumental developments since 2009 have enhanced TDM capabilities through transmission, reflection, isotropic, polarisation‐sensitive, and dual‐view configurations ...
Leonardo Pestana Legori, Carlos Alberto Chacón Ávila, Matthieu Debailleul, Nicolas Verrier, Olivier Haeberlé   +4 more
wiley   +1 more source

Generation of supercontinuum bottle beam using an axicon

Optics Express, 2007
A supercontinuum bottle beam was successfully produced by focusing a supercontinuum laser beam after passing through an axicon. The supercontinuum radiation was generated from a microstructured fiber pumped by a self-kerr-lens mode-locked femtosecond Ti:sapphire laser. The cross-section intensity distributions of the generated bottle were recorded by a
Ja-Hon, Lin, Ming-Dar, Wei, Hui-Hung, Liang, Kuei-Huei, Lin, Wen-Feng, Hsieh   +4 more
openaire   +2 more sources

A validated deep learning workflow for 3D quantification of amyloid plaques in cleared mouse brain

Journal of Microscopy, EarlyView.
Abstract Accurate quantification of amyloid plaque pathology is essential for understanding Alzheimer's disease (AD) progression and evaluating therapeutic interventions. Yet, conventional histology relies on sampling thin tissue sections and therefore incompletely captures three‐dimensional (3D) plaque distributions, introducing bias and limiting ...
Veronika Valova, Louise Cole, Neftali Flores Rodriguez, Filip Braet, Daniel M. Johnstone, Richard Harwood   +5 more
wiley   +1 more source

Extrinsic Limitations of Stealthy Hyperuniform Devices

Advanced Optical Materials, Volume 14, Issue 37, 9 October 2026.
Stealthy hyperuniform devices exhibit a scattering‐free angular region whose extent follows a simple quenching equation. Experimental measurements confirm this prediction but reveal quenching efficiencies far below theoretical expectations. Multiple scattering and finite‐size effects are quantified, establishing realistic performance limits for ...
Yuhao Xu, Miao Chen, Louis Forestier, Franck Carcenac, Laurent Mazenq, Philippe Lalanne   +5 more
wiley   +1 more source

Spectral optimization of supercontinuum shaping using metaheuristic algorithms, a comparative study

Scientific Reports
Supercontinuum generation in optical fiber involves complex nonlinear dynamics, making optimization challenging, and typically relying on trial-and-error or extensive numerical simulations.
Mathilde Hary, Teemu Koivisto, Sara Lukasik, John M. Dudley, Goëry Genty   +4 more
doaj   +1 more source

Temperature‐Dependent Conduction and Gate‐Tunable Photoresponse in Graphene Photodetectors

Advanced Photonics Research, Volume 7, Issue 10, October 2026.
CMOS‐compatible, Si3N4‐passivated graphene photodetectors on Si/SiO2 substrates demonstrate reversible, gate‐tunable switching between positive and negative photoconductance without heterojunctions. Under broadband illumination, the devices show a sublinear photocurrent response consistent with photogating.
Daniel C. Nickel, Daniele Capista, Rasuole Lukose, Aniello Pelella, Adolfo Mazzotti, Sebastiano De Stefano, Filippo Giubileo, Christian Wenger, Antonio Di Bartolomeo, Mindaugas Lukosius   +9 more
wiley   +1 more source

Efficient Polarization‐Entangled Photon‐Pair Generation by a Fiber‐In‐Line van der Waals Material

Advanced Science, Volume 13, Issue 57, 14 October 2026.
Telecom‐wavelength polarization‐entangled photon pairs are generated in a van der Waals‐material‐integrated all‐fiber device via spontaneous parametric down‐conversion. The demonstrated fiberized quantum light source bridges emerging 2D nonlinear materials and practical quantum photonic systems, opening new opportunities for scalable fiber‐based ...
Jungseok Choi, Seongju Ha, Seungjae Lim, Joohyeon Ahn, Jaekyoung Kim, Jong Hyuk Yim, Nam Hun Park, Youngdong Yoo, Jae‐Ung Lee, Hee Su Park, Sang Min Lee, Dong‐Il Yeom   +11 more
wiley   +1 more source

Green‐Synthesized Bi‐Doped PEI N‐GQDs Enabling Long‐Term Stable Silicon Heterojunction Photodetectors

Advanced Electronic Materials, Volume 12, Issue 19, 12 October 2026.
Green‐engineered BiNPs&PEI N‐GQDs enable dual‐emission p‐Si Schottky photodetectors with strong photoresponse, long‐term stability, and a simple scalable fabrication strategy, offering a promising route for sustainable optoelectronic and photosensing applications.
Zeynep Berktaş, Arun Kumar, Salar H. Sedani, Mustafa Yıldız, İlker Yıdız, Antonio Di Bartolomeo, Elif Orhan   +6 more
wiley   +1 more source

Low-power supercontinuum generation in Ge-rich SiGe waveguides from 4 to 13 μm wavelength

APL Photonics
The development of on-chip spectroscopic systems has attracted a lot of attention in recent years. Such systems require broadband mid-infrared sources, resulting in the exploration of mid-infrared supercontinuum generation. This study focuses on reducing
Victor Turpaud, Yijun Yang, Hamza Dely, Annabelle Bricout, Thi Hao Nhi Nguyen, Nooman El Bouchikhi, Stefano Calcaterra, Davide Impelluso, Jean-Michel Hartmann, Samson Edmond, Carlos Alonso-Ramos, Laurent Vivien, Jacopo Frigerio, Giovanni Isella, Delphine Marris-Morini   +14 more
doaj   +1 more source

Carbon Dots With Concurrently Tunable Photoluminescence and Nanozyme Activity for Agricultural Stress Resistance: A Carbonization Degree‐Mediated Strategy

Aggregate, Volume 7, Issue 10, October 2026.
Carbonization degree is established as a unified structural parameter that synergistically governs the photoluminescence and SOD‐like activity of CDs. Progressive carbonization generates sp2‐conjugated domains where edge‐site carbonyl groups act as catalytic sites for SOD‐like activity.
Yunge Tang, Yue Zhang, Xin Peng, Xinyuan Wang, Pengpeng Wang, Kang Sun, Lei Han, Siyu Lu, Xiaokai Xu   +8 more
wiley   +1 more source