Results 61 to 70 of about 5,570,802 (292)

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

Advanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang, Zhewen Xu, Yuwen Xu, Björn Josteinsson, Simon Josephy, Dawei Zhang, Yunlong Sun, Heung‐Sik Park, Jihun Kim, Kanghyun Chu, Kyung Song, Danyang Wang, Chan‐Ho Yang, Andrea Morales, Jan Seidel   +14 more
wiley   +1 more source

Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser [PDF]

, 2006
We report the operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser. The laser delivers 1 W at 855 nm and is pumped with a cost-effective fiber-coupled laser diode emitting at 806 nm.
Ferguson, Allister I., McGinily, Stephen, Schmid, Marc, Ackemann, Thorsten, Zhang, Wei, Riis, Erling   +5 more
core   +4 more sources

Biodegradable and Biocompatible Functional Polymers for Biomedical Applications

Advanced Functional Materials, EarlyView.
Biodegradable and biocompatible functional polymers integrate electrical, mechanical, and stimuli‐responsive functionalities while enabling programmed degradation under physiological conditions. This review introduces recent advances in conductive, shape‐memory, self‐healing, photocurable, and adhesive polymer systems, emphasizing material design ...
Won Bae Han, Shuvra Mondal, Sungkeun Han, Chan‐Hwi Eom, Venkata Ramesh Naganaboina, Suk‐Won Hwang   +5 more
wiley   +1 more source

Digitally Controlled Micro-LED Array for Linear Visible Light Communication Systems

IEEE Photonics Journal, 2015
In a visible light communications (VLC) system, the frequency response of the light-emitting diode (LED) limits the signal bandwidth and, thus, becomes the bottleneck of the transmission data rate.
H. Qian, S. Zhao, S. Z. Cai, T. Zhou
doaj   +1 more source

Tuning the Optoelectronic Properties of Wide Bandgap Perovskites: Data‐Driven Insights from Combinatorial Synthesis and High‐Throughput Experimentation

Advanced Functional Materials, EarlyView.
Combinatorial vapor deposition enables independent tuning of Cs/Pb and Br/Cl in wide‐bandgap perovskites. Automated multimodal mapping of 500+ compositions reveals a high‐energy optical transition that correlates with enhanced photoluminescence, defining a practical Cs/Pb window.
Alexander Wieczorek, Sergey Tsarev, Nathan Rodkey, Oleksandr Pshyk, Stefanie Frick, Maksym V. Kovalenko, Sebastian Siol   +6 more
wiley   +1 more source

The effect of linear lighting systems on the productive performance and egg quality of laying hens

Poultry Science, 2020
The low uniformity in light distribution provided by conventional lighting systems installed in laying poultry can compromise the productive performance and egg quality of laying hens.
Juliana de S.G. Barros, Tárcio A. dos S. Barros, Karina Sartor, Janaína A. Raimundo, Luiz A. Rossi   +4 more
doaj   +1 more source

Two Coexisting Pathways to Volatility in Valence‐Change Memory Devices

Advanced Functional Materials, EarlyView.
Volatile VCM‐type memristive devices exhibit current relaxation after resistive switching, but their microscopic origin remains debated. Using pulsed measurements and a new Tunnel‐DLTS approach on Pt/SrTiO3/Nb:SrTiO3 devices, we show that post‐SET volatility is predominantly ionic, while electronic contributions—arising from quasi‐Fermi‐level ...
Johannes Hellwig, Clemens Wittberg, Dimitrios Spithouris, Regina Dittmann   +3 more
wiley   +1 more source

Complex Evaluation of Light Sources in Case of Electric Power Cost Increase

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2008
The paper gives complex evaluation of efficiency of incandescent lamps, luminescent and light-emitting-diode (LED) light sources in case of electric power price increase.
Y. N. Kolesnik, A. V. Ivaneychik
doaj  

Tetracyclic π‐Extended Multi‐Resonant TADF Emitters for Green PSF‐OLEDs With 37.7% EQE and BT.2020‐Compatible Top‐Emitting Devices

Advanced Functional Materials, EarlyView.
Ultra‐narrow green multi‐resonance thermally activated delayed fluorescence emitters have been developed by linear π‐extension strategy using tetracyclic naphtho[2,3‐b]benzofuran unit. The resulting phosphorescence‐sensitized OLEDs achieve a maximum external quantum efficiency of 37.7% in the bottom‐emitting architecture, while the complementary top ...
Eo Jin Jeon, Truong Thi Thuy, Nikita Abitkar, Paramasivam Palanisamy, Jiheon Kim, Myungsun Sim, Athithan Maheshwaran, Jang Hyuk Kwon   +7 more
wiley   +1 more source

Passively mode-locked diode-pumped surface-emitting semiconductor laser

, 2000
A surface-emitting semiconductor laser has been passively mode locked in an external cavity incorporating a semiconductor saturable absorber mirror. The gain medium consists of a stack of 12 InGaAs-GaAs strained quantum wells, grown above a Bragg mirror ...
Tropper, A.C., Morier-Genoud, F., F. Morier-Genoud, J. S. Roberts, Roberts, J.S., Garnache, A., A. C. Tropper, Keller, U., Paschotta, R., A. Garnache, Oesterle, U., S. Dhanjal, U. Oesterle, Dhanjal, S., Häring, R., R. Häring, R. Paschotta, S. Hoogland, U. Keller, Hoogland, S.   +19 more
core   +1 more source