Results 71 to 80 of about 2,279,860 (296)

Electrically pumped all photonic crystal 2nd order DFB lasers arrays emitting at 2.3 μm

APL Photonics, 2017
Single-mode, widely tunable laser diodes in the mid-infrared range are highly interesting for demanding spectroscopic applications involving multi-species discrimination. We report on an alternative approach using single frequency laser arrays.
B. Adelin, O. Gauthier-Lafaye, P. Dubreuil, A. Lecestre, Y. Rouillard, M. Bahriz, G. Boissier, A. Vicet, A. Monmayrant   +8 more
doaj   +1 more source

Influence of Fe Particle Size Distribution on Chemical Homogeneity, Microstructure, and Crack Formation in Fe–SiC Powder Blends Processed by PBF‐LB/M

Advanced Engineering Materials, EarlyView.
The influence of Fe particle size on in situ alloying of Fe–SiC powder blends in PBF‐LB/M is revealed. Contrary to expectations, the coarser Fe fraction provides a broader crack‐free processing window and slightly improved elemental homogeneity while producing higher but more variable hardness. The results highlight a complex trade‐off between particle
Anna Luise Strauch, Anastasiya Toenjes, Matthias Steinbacher   +2 more
wiley   +1 more source

Effect of Low-power Laser on Treatment of Orofacial Pain

Journal of Dental Research, Dental Clinics, Dental Prospects, 2010
Low-power lasers are a group of lasers with a power less than 250 mW and unlike high-power lasers they have no effect on tissue temperature; they produce light-dependent chemical reactions in tissues.
Hamid Reza Khalighi , Fahimeh Anbari , Jamileh Beygom Taheri , Sedigheh Bakhtiari , Zahra Namazi, Firoz Pouralibaba   +5 more
doaj  

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

Advanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng, Qian Yao, Yanan Sun, Hongyu Lv, Zhongchao Bai, Guoliang Zhang, Nana Wang, Jian Yang   +7 more
wiley   +1 more source

Uso de diodos emissores de luz (LED) de potência em laboratório de Óptica

Caderno Brasileiro de Ensino de Física, 2013
Após iluminar casas, edifícios e ruas há mais de 100 anos, a lâmpada incandescente criada por T. A. Edison, em breve se tornará uma relíquia do passado.
Luiz Pinheiro Cordovil da Silva, C. E. da Silva, A. M. Freitas, A. J. Santiago   +3 more
doaj   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

On-chip wide tuning of high-power quantum cascade laser based on a vertical-integrated heater

APL Photonics
Mid-infrared high-peak power quantum cascade lasers are highly useful in many applications such as gas sensing and free-space communication. However, practical application scenarios place further demands on the wavelength tunability and integration of ...
Binru Zhou, Shichen Zhang, Yu Ma, Zejun Ma, Haiyun Dong, Rusong Li, Yixuan Zhu, Ning Zhuo, Shenqiang Zhai, Jinchuan Zhang, Fengqi Liu, Quanyong Lu   +11 more
doaj   +1 more source

Mid infrared gas spectroscopy using efficient fiber laser driven photonic chip-based supercontinuum

Nature Communications, 2019
The mid-infrared spectral region is important for gas sensing applications. Here, Grassani et al. demonstrate efficient supercontinuum generation from fibre-lasers injected into silicon nitride waveguides to provide a turn-key mid-IR source with ...
Davide Grassani, Eirini Tagkoudi, Hairun Guo, Clemens Herkommer, Fan Yang, Tobias J. Kippenberg, Camille-Sophie Brès   +6 more
doaj   +1 more source

Hollow-core Optical Fiber Gas Lasers (HOFGLAS): a review [Invited] [PDF]

, 2012
International audienceThe development of hollow core photonic crystal fibers with low losses over a broad spectral region in the near IR enabled the demonstration of a novel laser type - Hollow-core Optical Fiber Gas Laser (HOFGLAS).
Washburn, Brian R., Alharbi, M., Bradley, Thomas D., Wang, Y.Y., Dadashzadeh, Neda, Benabid, F., Baumgart, Bastian, Nampoothiri, A. V. Vasudevan, Campbell, Neil, Corwin, Kristan L., Wang, Yingying, Rudolph, Wolfgang, Mao, Chenchen, Jones, Andrew M., Benabid, Fetah A., Bradley, T., Alharbi, Meshaal, Fourcade Dutin, Coralie   +17 more
core   +1 more source

DNA‐Templated 2D Heterostructures as Phototriggered Dynamic Nanohybrids: From Releasing Molecular Loads to Controlling Enzyme Biocatalytic Function

Advanced Functional Materials, EarlyView.
DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen, Haosen Miao, Weiying Hong, Matteo Palma   +3 more
wiley   +1 more source