Results 21 to 30 of about 18,085 (258)

Brillouin lasers in a graphene microresonator for multispecies and individual gas molecule detection

APL Photonics, 2023
Optical microcavities offer a promising platform for highly efficient light–matter interactions. Recently, the combination of microresonators and 2D materials in nanoscale has further enriched the optoelectronics of the microcavity geometries, spurring ...
Ning An, Yiwei Li, Hao Zhang, Yupei Liang, Teng Tan, Yongzheng Guo, Zihan Liu, Mingyu Liu, Yanhong Guo, Yu Wu, Bo Peng, Yunjiang Rao, Guangming Zhao, Baicheng Yao   +13 more
doaj   +1 more source

Terawatt-class femtosecond long-wave infrared laser

Frontiers in Physics
We utilized a nonlinear post-compression technique to generate 675-fs, 9.2-μm CO2 laser pulses with a peak power of 1.6 TW. This achievement represents the highest peak power ever attained in the femtosecond pulse format within the long-wave infrared ...
Igor. V. Pogorelsky, Mikhail N. Polyanskiy, Marcus Babzien, Andrew Simmonds, Mark A. Palmer   +4 more
doaj   +1 more source

Photoacoustic spectroscopy-based ppb-level multi-gas sensor using symmetric multi-resonant cavity photoacoustic cell

Photoacoustics, 2023
In this paper, we propose and experimentally demonstrate a symmetric multi-resonant cavity photoacoustic cell (MR-PAC) with dual microphones detection, based on multi-resonator photoacoustic spectroscopy (MR-PAS). The designed photoacoustic cell contains
Tailin Li, Chaotan Sima, Yan Ai, Chen Tong, Jinbiao Zhao, Zikai Zhao, Ping Lu   +6 more
doaj   +1 more source

Thermoreflectance Detection of Point Defects Resulting from Focused Ion Beam Milling

Advanced Engineering Materials, EarlyView.
Focused ion beam (FIB) milling is a common tool for nanoscale material processing, however irradiation damage, redeposition, and contamination can occur. We use several characterization tools to show FIB‐induced effects beyond 1 mm from the milled area.
Thomas W. Pfeifer, Eric R. Hoglund, Anton V. Ievlev, Patrick E. Hopkins   +3 more
wiley   +1 more source

Tunable Near-Infrared Laser Emission at 1.7 μm Generated by Stimulated Raman Scattering of Sulfur Hexafluoride Molecules in Anti-Resonant Hollow-Core Fibers

Photonics
Fiber lasers operating at 1.7 μm have significant application value in fields such as gas detection and material processing due to their characteristics, including compact structure and ease of thermal management. Based on the stimulated Raman scattering
Peicong Liu, Tianyu Li, Wenxi Pei, Luohao Lei, Jing Shi, Guorui Lv, Qi Chen, Guangrong Sun, Yamei Xu, Shuyi Wang, Zhiyue Zhou, Zefeng Wang   +11 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Watt-Level Tunable Mid-Infrared Laser Emission at 2.8 μm Generated by Stimulated Raman Scattering of Methane Molecules in Hollow-Core Fibers

Photonics
Fiber lasers operating at 2.8 μm have important applications in fields such as polymer material processing and medical surgery. Fiber gas lasers (FGLs) based on stimulated Raman scattering (SRS) in hollow-core fibers (HCFs) provide a superior approach to
Peicong Liu, Wenxi Pei, Luohao Lei, Tianyu Li, Guorui Lv, Qi Chen, Guangrong Sun, Shuyi Wang, Zhiyue Zhou, Zefeng Wang   +9 more
doaj   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Low‐Cost, Large‐Scale Nanoporous Metals by Mechanical Alloying, Oxide Reduction, and Dealloying of Powders

Advanced Engineering Materials, EarlyView.
Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source