Results 81 to 90 of about 572,572 (292)

Determination of the Effective Lifetime of a Spinor Bose–Einstein Condensate

Photonics
The effective lifetime of ultra-cold atoms in specific quantum states plays a crucial role in studying interaction parameters within quantum systems. Measuring the effective lifetime of various quantum states within ultra-cold atoms is a fundamental task
Xin Wang, Yong Qin, Jun Jian, Wenliang Liu, Jizhou Wu, Yuqing Li, Vladimir Sovkov, Jie Ma   +7 more
doaj   +1 more source

Cover slip external cavity diode laser

, 2007
The design of a 671 nm diode laser with a mode-hop-free tuning range of 40 GHz is described. This long tuning range is achieved by simultaneously ramping the external cavity length with the laser injection current.
Carr, Adra V., Cronin, Alexander D., Lonij, Vincent P. A., Perreault, John D., Sechrest, Yancey H., Waitukaitis, Scott R.   +5 more
core   +1 more source

Tailored Hierarchical Porous Copper Architectures via Three Dimensional Printing and Pressure‐less Sintering for Next‐Generation Lithium‐Metal Batteries

Advanced Engineering Materials, EarlyView.
A hierarchical porous copper current collector is fabricated via three‐dimensional printing combined with pressureless sintering to stabilize lithium metal anodes. The interconnected architecture lowers local current density, guides uniform Li deposition within pores, and suppresses dendrite growth.
Alok Kumar Mishra, Mukul Shukla
wiley   +1 more source

Enhanced Detection of Pesticide Residues Using Two-Dimensional Raman Correlation Spectroscopy and Machine Learning

Applied Spectroscopy Practica
The accurate detection of pesticide residues in fresh produce is essential for public health. This study evaluated the use of two-dimensional correlation spectroscopy (2D-COS), specifically applied to Raman data, combined with principal component ...
Charles N. Ndung’u, Kenneth A. Kaduki, M. Ian Kaniu, Lucy W. Kiruri   +3 more
doaj   +1 more source

Efficient Loading of an Yb MOT on the ¹S₀ → ¹P₁ Transition

Photonics
We demonstrate efficient loading of an Yb three-dimensional magneto-optical trap (3D MOT) on the 1S0 → 1P1 transition. The experiment employs a two-dimensional magneto-optical trap (2D MOT) as an efficient cold atom source. Through optimization of the 2D
Zhufang Zhao, Shunxiang Wang, Jun Jian, Quanxin Zhang, Wenliang Liu, Jizhou Wu, Yuqing Li, Jie Ma   +7 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

A monolithically integrated near-infrared imager with crystallization- and oxidation-modulated tin-lead perovskites

Light: Science & Applications
The fast crystallization and facile oxidation of Sn2+ of tin-lead (Sn-Pb) perovskites are the biggest challenges for their applications in high-performance near-infrared (NIR) photodetectors and imagers.
Zhichun Yang, Jingjing Liu, Haotian Bao, Zonghao Liu, Zaiwei Wang, Xiangdong Li, Zhihao Chen, Guofeng Zhang, Ruiyun Chen, Jianyong Hu, Shuangping Han, Wei Chen, Chengbing Qin, Liantuan Xiao, Suotang Jia   +14 more
doaj   +1 more source

Experimental Realization of a Mach–Zehnder-Type Internal-State Atom Interferometer in Sodium Spinor BEC

Photonics
This study demonstrates a Mach–Zehnder-type internal-state atom interferometer in a sodium F = 1 spinor Bose–Einstein condensate (BEC), which is realized by applying a three-pulse radio-frequency sequence (π/2–π–π/2) to manipulate the two magnetic ...
Jun Jian, Zhufang Zhao, Quanxin Zhang, Shunxiang Wang, Wenliang Liu, Jizhou Wu, Yuqing Li, Jie Ma   +7 more
doaj   +1 more source

Thermophysical Properties of the Desulphurization Slags With Various CaS and CaO/Al2O3 Ratio

Advanced Engineering Materials, EarlyView.
This article investigates how CaS content and the CaO/Al2O3 ratio influence the thermophysical properties of desulphurization slags. Using experimental measurements and thermodynamic simulations, this study reveals complex effects on viscosity, surface tension, and density, providing new insight into slag structure and phase behavior under ...
Eldar Salpagarov, Matheus Roberto Bellé, Anton Yehorov, Julia Richter, Olena Volkova   +4 more
wiley   +1 more source

Removing Oxide Layers and Retaining Oxide‐Free Steel Surfaces by Polishing in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this study, the efficacy of wet mechanical polishing under an oxygen‐free atmosphere for deoxidation and the retention of an oxide‐free steel surface are elucidated using X‐ray photoelectron spectroscopy. The methodology proved successful; however, the results were highly dependent on the preparation of the solvents used to clean the samples after ...
Friedrich Bürger, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +2 more
wiley   +1 more source