Results 71 to 80 of about 11,003 (245)

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

Non-silica microstructured optical fibers for mid-IR supercontinuum generation from 2 µm - 5 µm

, 2006
We have performed numerical simulations to investigate the optimization of compound glass microstructured optical fibers for mid IR supercontinuum generation beyond the low loss transmission window of silica, using pump wavelengths in the range 1.55-2.25
Heike Ebendorff-Heidepriem, Monro, Tanya M., Gilberto Brambilla, Richardson, David J., Vittoria Finazzi, Poletti, F., Xian Feng, Price, Jonathan H.V., Brambilla, Gilberto, Periklis Petropoulos, Flanagan, J., Finazzi, Vittoria, Tanya M. Monro, David J. Richardson, Leong, Julie Y.Y., Richardson, D., Joanne C. Flanagan, Petropoulos, P., Monro, T., Price, J., Ebendorff-Heidepriem, H., Brambilla, G., Ebendorff-Heidepriem, Heike, Flanagan, Joanne C., Feng, Xian, Petropoulos, Periklis, Leong, J., Finazzi, V., Julie Y. Y. Leong, Jonathan H. V. Price, Poletti, Francesco, Feng, X., Francesco Poletti   +32 more
core   +1 more source

Multimode nonlinear fibre optics: theory and applications [PDF]

, 2012
Optical fibres have been developed as an ideal medium for the delivery of optical pulses ever since their inception (Kao & Hockham, 1966). Much of that development has been focused on the transmission of low-energy pulses for communication purposes ...
Horak, Peter, Peter Horak, Poletti, Francesco, Francesco Poletti   +3 more
core   +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

Wavefront analysis of a white-light supercontinuum [PDF]

Optics Express, 2018
Conference on Lasers and Electro-Optics : [Proceedings] - OSA Washington, D.C., 2018. - ISBN 978-1-943580-42-2 - doi:10.1364/CLEO_QELS.2018.FW4E.4 CLEO: QELS_Fundamental Science, CLEO QELS, San Jose, California, USA, 13 May 2018 - 18 May 2018; Washington, D.C., USA : OSA, OSA Terchnical Digest (online) 2 pp. (2018).
Kueny, Emma, Calendron, Anne-Laure, Levecq, Xavier, Varkentina, Nadezda, Meier, Joachim, Kärtner, Franz X.   +5 more
openaire   +4 more sources

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

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

High-nonlinearity dispersion-shifted lead-silicate holey fibers for efficient 1-µm pumped supercontinuum generation

, 2006
This paper reports on the recent progress in the design and fabrication of high-nonlinearity lead-silicate holey fibers (HFs). First, the fabrication of a fiber designed to offer close to the maximum possible nonlinearity per unit length in this glass ...
Leong, J.Y.Y., Asimakis, S., Moore, R., Richardson, D.J., K.E. Frampton, J.H.V. Price, R.C. Moore, H. Ebendorff-Heidepriem, Price, J.H.V., S. Asimakis, D.J. Richardson, Monro, T.M., Moore, R.C., X. Feng, Richardson, D., Frampton, K.E., Petropoulos, P., Monro, T., Ebendorff-Heidepriem, H., Price, J., T.M. Monro, V. Finazzi, Frampton, K., Leong, J., Finazzi, V., J.Y.Y. Leong, P. Petropoulos, Feng, X.   +27 more
core   +1 more source

On-Chip Supercontinuum Generation Pumped by Short Wavelength Fiber Lasers

Photonics
Supercontinuum (SC) generation pumped by fiber lasers with short wavelengths below 2.0 μm is important since it can provide a compact light source for various applications.
Peng Chen, Zhe Long, Qi Cheng, Maozhuang Song, Wei Wang, Ruixue Liu, Zheng Zhang, Kai Xia, Zhen Yang, Lei Qian, Shengchuang Bai, Xunsi Wang, Peilong Yang, Peipeng Xu, El Sayed Yousef, Rongping Wang   +15 more
doaj   +1 more source

Optical Kerr Gating as a Strategy for Noise Reduction in Femtosecond Stimulated Raman Spectroscopy

Journal of Raman Spectroscopy, EarlyView.
We report an experimental approach, where an Optical Kerr gate is incorporated with Femtosecond Stimulated Raman Spectrometry (FSRS). The gate functions as a temporal filter that preferentially suppresses the FSRS inherent background. FSRS spectra are reported with the Kerr‐gated methodology with significantly improved SNR compared to the conventional ...
Spyridon Kaziannis, Lazaros Varvarezos, Sotiris Danakas, Elissavet Karkadaki, Cesar Bernando, Miroslav Kloz   +5 more
wiley   +1 more source