Results 51 to 60 of about 2,605 (184)

High‐Sublimation‐Temperature Additives for Efficient Perovskite Solar Cells via Single‐Source Evaporation

Advanced Energy Materials, EarlyView.
The introduction of high‐sublimation‐temperature additives during the mechanosynthesis of FAPbI3 powders enables the single‐source evaporation of phase‐pure, additive‐free FAPbI3 thin films of high optoelectronic quality. The additive‐engineered deposition process yields photovoltaic devices with stabilized efficiencies exceeding 18% for an active ...
Zongbao Zhang, Ran Ji, Tim Schramm, Elena Siliavka, Chunqiu Zheng, Julius Brunner, Bekcy Joseph, Kashimul Hossain, Angelika Wrzesinska‐Lashkova, Vladimir Shilovskikh, Tianyu Zhao, Nathaniel P. Gallop, Boris Rivkin, Yana Vaynzof   +13 more
wiley   +1 more source

Supercontinuum generation in a multi-plate medium

Optics Express, 2016
We analyze femtosecond supercontinuum generation in a distribution of thin solid plates to show that the distributed scheme inhibits processes leading to pulse breakup while allowing spectral expansion to proceed as desired. We introduce basic criteria for setting the plate thickness or initial laser intensity and the location of each plate in the ...
Yu-Chen, Cheng, Chih-Hsuan, Lu, Yuan-Yao, Lin, A H, Kung   +3 more
openaire   +2 more sources

Metalens‐Enabled Double‐Helix Point Spread Function for Multifunctional Imaging

Advanced Physics Research, EarlyView.
A single metalens is employed to generate a double‐helix point spread function (DH‐PSF). At the design wavelength, the PSF rotation angle varies linearly with depth, while the lobe spacing follows an inverse dependence on axial position. At a fixed depth, the lobe spacing further exhibits a linear dependence on wavelength due to dispersion.
Xuanyu Wu, Xuanguang Wu, Liang Zhou, Bingyan Wei, Sheng Liu, Dandan Wen, Yi Zhang, Jianlin Zhao, Peng Li   +8 more
wiley   +1 more source

Dispersion-Engineered Step-Index Tellurite Fibers for Mid-Infrared Coherent Supercontinuum Generation from 1.5 to 4.5 μm with Sub-Nanojoule Femtosecond Pump Pulses

Applied Sciences, 2018
Mid-infrared supercontinuum generation from 1.5 to 4.5 µm with sub-nanojoule femtosecond pump pulses is demonstrated by using a short segment of dispersion-engineered step-index tellurite fiber with very low OH content.
Paul Froidevaux, Arnaud Lemière, Bertrand Kibler, Frédéric Désévédavy, Pierre Mathey, Grégory Gadret, Jean-Charles Jules, Kenshiro Nagasaka, Takenobu Suzuki, Yasutake Ohishi, Frédéric Smektala   +10 more
doaj   +1 more source

Photothermal CO2 Hydrogenation: Reactions, Mechanisms, and Catalyst Design

Carbon Energy, EarlyView.
Reactions, mechanisms, and catalyst design for photothermal CO2 hydrogenation. ABSTRACT Photothermal CO2 hydrogenation has attracted extensive attention because it provides a green and sustainable approach to fuel and chemicals production. The photothermal catalyst plays a critical role in CO2 conversion through a range of reactions.
Shuai Yan, Yuting Wang, Wenhao Zhao, Jinqiang Zhang, Guangyao Chen, Lei Jiang, Yun Wang, Yingquan Chen, Xiong Zhang, Xianhua Wang, Kuo Zeng, Hongqi Sun, Shuxin Ouyang, Yonggang Yao, Haiping Yang, Hanping Chen   +15 more
wiley   +1 more source

Accessing Sn≥2 States of a TADF Emitter by Femtosecond NIR Spectroscopy

Chemistry – A European Journal, EarlyView.
The depicted thermally activated delayed fluorescence (TADF) emitter was studied by femtosecond near‐infrared (NIR) spectroscopy. A prominent NIR transition was shown to be strongly solvent‐dependent, with implication for intersystem crossing in the compound.
Wiebke Haselbach, Jasmin Matthes, Andreas Prüfer, Simon L. Zimmermann, Monika Flörke, Thomas J. J. Müller, Peter Gilch, Barbara E. Nogueira de Faria   +7 more
wiley   +1 more source

Nonlinear Phenomena of Ultra-Wide-Band Radiation in a Photonic Crystal Fibre

International Journal of Optics, 2011
We report the results of a numerical and experimental analysis of femtosecond pulse propagation in a highly nonlinear photonic crystal fibre (PCF). The propagation of ultrashort pulses in PCF is studied taking into account the effects of dispersion, self-
Rim Cherif, Mourad Zghal
doaj   +1 more source

Quantification and analysis of the nonlinear effects in spectral broadening through solid medium of femtosecond pulses by neural network

Physical Review Research, 2022
Supercontinuum generation has been widely applied in laser spectroscopy and few-cycle pulse generation. It is composed of complex and unmeasurable nonlinear optical effects, which influence the final broadened spectrum markedly.
Yitan Gao, Xianzhi Wang, Xiaoxian Zhu, Kun Zhao, Heyuan Liu, Zhaohua Wang, Shaobo Fang, Zhiyi Wei   +7 more
doaj   +1 more source

Research progress on the use of the optical coherence tomography system for the diagnosis and treatment of central nervous system tumors

Ibrain, Volume 11, Issue 1, Page 3-18, Spring 2025.
With the advantages of high‐resolution imaging, efficient image acquisition, intraoperative real‐time detection, and radiation‐free and noninvasive characteristics, optical coherence tomography (OCT) provides accurate diagnosis and effective intraoperative guidance for the minimally invasive diagnosis and treatment of central nervous system (CNS ...
Jiuhong Li, Ziba Ayi, Gonggong Lu, Haibo Rao, Feilong Yang, Jing Li, Jiachen Sun, Junlin Lu, Xulin Hu, Si Zhang, Xuhui Hui   +10 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