Results 91 to 100 of about 51,099 (299)

Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films

Advanced Functional Materials, EarlyView.
Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee, Yun‐Tae Kim, Hwarang Choi, Sanghwan Park, Seongyeop Lim, Chang Young Lee   +5 more
wiley   +1 more source

Integrated ultrafast Yb-Raman fiber amplifier based on nonlinear optical gain modulation

High Power Laser Science and Engineering
Nonlinear optical gain modulation (NOGM) is an effective approach for generating highly coherent femtosecond Raman pulses. In a typical NOGM system, the pump pulse energy boosting unit and nonlinear frequency conversion unit are separated, which poses a ...
Zhi Cheng, Jiaqi Zhou, Xinru Cao, Yatan Xiong, Yingjuan Shi, Xun Yang, Shuzhen Cui, Yan Feng   +7 more
doaj   +1 more source

Numerical study on the characteristics of hybrid seeded femtosecond optical parametric amplifier at mid-infrared wavelength

Results in Physics, 2019
In the optical parametric amplifier (OPA) process, the phase of the pump is transmitted to the amplified signal due to the spatial walk-off effect and/or a temporal group velocity mismatch (GVM) effect between coherent light waves.
Yuan Zhou, Ying Chen, Dongwen Zhang, Guobao Jiang, Lulu Wang, Fangrong Hu   +5 more
doaj   +1 more source

DNA‐Origami‐Assembled Rhodium Nanoantennas for Deep‐UV Label‐Free Single‐Protein Detection

Advanced Functional Materials, EarlyView.
Deep‐UV autofluorescence of single proteins in DNA origami‐based rhodium nanoantennas. Precisely positioned within the plasmonic nanogap, proteins retain their native state while their intrinsic emission is strongly amplified, enabling label‐free single‐molecule detection and opening new opportunities for highly sensitive and specific biosensing ...
Nicco Corduri, Malavika Kayyil Veedu, Yifan Yu, Yanqiu Zou, Jie Liu, Denis Garoli, Guillermo P. Acuna, Jérôme Wenger, Karol Kołątaj   +8 more
wiley   +1 more source

A Hybrid Optical Fiber and FSO System for Bidirectional Communications Used in Bridges

IEEE Photonics Journal, 2015
In this paper, a 10-Gb/s hybrid optical fiber (OF) and free-space optics (FSO) link as part of a bidirectional long-haul OF transmission for application in outdoor environments such as bridges is proposed.
Yi-Lin Yu, Shien-Kuei Liaw, Hsi-Hsir Chou, Hoa Le-Minh, Zabih Ghassemlooy   +4 more
doaj   +1 more source

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

Advanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai, Xiaoyu Huo, Xin Long, Enkang Fu, Xusong Gong, Lei Wei, Liang An   +6 more
wiley   +1 more source

A Promising Route to Compact and Economic Sub-15 fs, PW-Level Ti:Sapphire Lasers

Photonics
In quest of achieving compact and economic PW-level Ti:Sapphire (Ti:sa) lasers with a sub-15 fs pulse duration, a modified hybrid amplification scheme, which combines the optical parametric chirped pulse amplifier (OPCPA) and the chirped pulse amplifier (
Fenxiang Wu, Jiabing Hu, Zongxin Zhang, Yang Zhao, Peile Bai, Haidong Chen, Xun Chen, Yi Xu, Yuxin Leng, Ruxin Li   +9 more
doaj   +1 more source

Machine learning-based Raman amplifier design

, 2018
A multi-layer neural network is employed to learn the mapping between Raman gain profile and pump powers and wavelengths. The learned model predicts with high-accuracy, low-latency and low-complexity the pumping setup for any gain profile.Comment ...
Carena, A., Curri, V., Ferrari, A., Zibar, D.   +3 more
core   +1 more source

Nanodiamond Quantum Sensors for Probing Free Radical Biology

Advanced Functional Materials, EarlyView.
Free radicals play key roles in cellular signaling and disease but remain difficult to measure in living systems. Nanodiamonds (NDs) with nitrogen‐vacancy (NV) centers enable quantum sensing of local magnetic noise via T₁ relaxometry, providing nondestructive radical detection in living cells.
Qi Lu, Yingke Wu, Tanja Weil
wiley   +1 more source

Optimization of Unrepeatered Optical Communication Systems and the Applications in Cabled Ocean Observatories

Photonics
Conventional repeatered optical communication systems face inherent limitations in terms of reliability, flexibility in optical fiber configuration, and power supply modes, particularly when applied to large-scale cabled ocean observatories, which have ...
Chang Shu, Feng Lyu, Rendong Xu, Jianping Li, Xichen Wang, Liang Xu   +5 more
doaj   +1 more source