Results 111 to 120 of about 12,890 (241)

Resonance-free deep ultraviolet to near infrared supercontinuum generation in a hollow-core antiresonant fibre

JPhys Photonics
Supercontinuum generation in the ultraviolet (UV) spectral region is challenging in solid-core optical fibres due to solarisation and photodarkening. Antiresonant hollow-core fibres have overcome this limitation and have been shown to guide UV light at ...
Mohammed Sabbah, Robbie Mears, Kerrianne Harrington, William J Wadsworth, James M Stone, Tim A Birks, John C Travers   +6 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

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

Polarization‐Dependence of Nonlinear Optical Effects in Silicon: The Case of Ultrafast Processing

Advanced Physics Research, Volume 5, Issue 10, October 2026.
The dependence of the input polarization for the nonlinear optical propagation in silicon is investigated theoretically and experimentally. The perturbative regime is examined using pump‐probe shadowgraphy and nonlinear transmission, whereas the case of permanent laser‐induced modifications is addressed using a combination of Raman micro‐spectroscopy ...
Namig Alasgarzade, Alessandro Alberucci, Stree V. Arumugam, Markus Blothe, Maxime Chambonneau, Chandroth P. Jisha, Stefan Nolte   +6 more
wiley   +1 more source

All-fiber coherent supercontinuum generation in a cascade of silica, fluoride, and chalcogenide fibers

JPhys Photonics
We present an all-fiber coherent supercontinuum spanning the spectral range of 1.7–5.0 µ m from a cascade of silica, ZBLAN, and chalcogenide (ChG) nonlinear fibers (NLFs).
Md Hosne Mobarok Shamim, Laurent Brilland, Radwan Chahal, Johann Troles, Martin Rochette   +4 more
doaj   +1 more source

Shot-Noise Limited, 10 MHz Swept-Source Optical Coherence Tomography for Retinal Imaging

IEEE Photonics Journal
Akinetic swept-sources are essential for high-speed optical coherence tomography (OCT) imaging. Time-stretched supercontinuum (TSSC) lasers have proven to be efficient for multi-MHz swept-sources.
Sacha Grelet, Alejandro Martinez Jimenez, Patrick B. Montague, Adrian Podoleanu   +3 more
doaj   +1 more source

AI‐Assisted Basal Cell Carcinoma Analysis in Line‐Field Confocal OCT: Exploring Diagnostic Metrics

Journal of Biophotonics, Volume 19, Issue 10, October 2026.
Two scan‐level metrics derived from device‐embedded AI risk scores, the composite and stability scores, consistently separated basal cell carcinoma from non‐BCC lesions in line‐field confocal OCT. These exploratory metrics reduce the impact of isolated false‐positive frames and may support AI‐assisted diagnosis, pending external validation.
Otto Dideriksen, Kevin Jacobsen, Gavrielle R. Untracht, Peter Alshede Philipsen, Merete Haedersdal, Vinzent Kevin Ortner   +5 more
wiley   +1 more source

Disentangling Molecular and Intrinsic Emission in Citric Acid–Urea Carbon Dots

Small Structures, Volume 7, Issue 10, October 2026.
Citric acid–urea thermal reactions under equimolar and urea‐rich conditions generate distinct fluorophore populations alongside carbon dots. Size‐exclusion chromatography reveals precursor‐dependent molecular species, whereas extended dialysis separates low‐molecular‐weight fluorophores from retained carbon dots. Despite the different synthetic regimes,
Chiara Olla, Jela Nociarová, Antonio Cappai, Luca Fusaro, Juraj Filo, Cristina Carucci, Andrea Salis, Marzia Fantauzzi, Markéta Paloncýová, Michal Otyepka, Miroslav Medved’, Francesca Mocci, Carlo Maria Carbonaro   +12 more
wiley   +1 more source