Results 101 to 110 of about 23,920 (290)

Picosecond absorption saturation in GaInAsP

Electronics Letters, 1984
Optical excite/probe measurements in Ga0.35In0.65As0.78¯P0.22 using high-power 5 ps pulses at 1.054 µm show a recovery of the bleached transmission in 12 Ps consistent with fast Auger carrier recombination. Evidence of induced intervalence band absorption is apparent.
A. Miller, R.J. Manning, A.M. Fox, J.H. Marsh   +3 more
openaire   +1 more source

PEDOT‐Based Eutectogel Electrode Arrays for Enhanced High‐Resolution Electrogastrography: Fabrication, Stability, and Wearable Performance

Advanced Functional Materials, EarlyView.
Here, we present a high‐density PEDOT eutectogel electrode array for enhanced body surface gastric mapping. Silver electrodes are blade‐coated onto flexible substrates, followed by electrogelation of PEDOT:PSS and the deposition of a PEDOT:LS eutectogel.
Christopher Slaughter, Luke Gatecliff, Xudong Tao, Ruben Ruiz‐Mateos Serrano, Amy T. Jin, Matias L. Picchio, Daniele Mantione, Antonio Dominguez‐Alfaro, George G. Malliaras   +8 more
wiley   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

Theoretical Study of The Ratio A/As Effect on Saturable Absorber Performance of Passive Q-switched Tm+3 Doped Fiber Laser System

مجلة علوم ذي قار
       The effect of the ratio of active media effective area to the saturable absorber effective area (A/As) on saturable absorber performance has been studied  numerically for passive Q-switching fiber laser system doped with Tm+3 as an active ...
Tahani M . Hussein , Abdul - Kareem Mahdi Salih, M. Benhaliliba   +2 more
doaj   +1 more source

Group IIIA/IVA monochalcogenides nanosheets for ultrafast photonics

APL Photonics, 2019
Despite extensive applications ranging from optoelectronic devices to flexible devices, two-dimensional layered materials used as ultrafast optical modulation materials have suffered from limited operation wavebands due to their intrinsic bandgap.
Mengyu Zhang, Junzi Li, Hao Chen, Jiaqiang Zhang, Jinde Yin, Tingchao He, Jinzhang Wang, Min Zhang, Bo Zhang, Jianping Yuan, Peiguang Yan, Shuangchen Ruan   +11 more
doaj   +1 more source

Formation of Stable Amorphous Calcium Phosphate and Collagen Assemblies by a Versatile Spray‐Drying Approach

Advanced Functional Materials, EarlyView.
Amorphous calcium phosphate (ACP) microparticles with long‐term and thermal stability are prepared with or without collagen using a scalable one‐pot spray‐drying process. Under simulated physiological conditions, they crystallize into biomimetic bone mineral and, when combined with collagen, form extrudable, fibrillar bone‐like 3D constructs.
Camila Bussola Tovani, Nessma Bennaceur, Celina Benkhellat, Tristan Georges, Clara Doisneau, Vaskar Sardhalia, Thierry Azaïs, Flora Lemaire, Halima Kerdjoudj, Mohamed Selmane, Capucine Sassoye, Marie Albéric, Cédric Boissière, Nadine Nassif   +13 more
wiley   +1 more source

Trap‐Modified Inverted Organic Photodetectors via Layer‐by‐Layer Processing with Poly(N‐vinylcarbazole) Additives

Advanced Functional Materials, EarlyView.
Trap state engineering in inverted organic photodetectors (OPDs) is achieved via combined layer‐by‐layer (LbL) processing and poly(N‐vinylcarbazole) (PVK) incorporation. LbL reduces the trap density while PVK additives gradually shift trap states from shallow band‐edge to deep mid‐gap levels, tailoring the energy distribution.
Jingwei Yi, Yi Yang, Yusen Pei, Apurva Gadikar, Vahid Mahdikhah, Myratgeldi Kotyrov, Seung Hyun Kim, Kenan Gundogdu, Wei You, Harald Ade, Franky So   +10 more
wiley   +1 more source

Two-wavelength, dual regime Q-switched erbium-doped fiber laser based on a microfiber loop coated with gold nanostars as the saturable absorber

Results in Optics
We report a two-wavelength, dual-regime Q-switched erbium-doped fiber laser employing a microfiber loop coated with gold nanostars as the saturable absorber.
A. Martinez-Rios, G. Anzueto-Sanchez, J.L. Pichardo-Molina, L.F. Enriquez-Gomez, R.E. Nuñez-Gomez, L.A. Rodriguez-Morales, O. Pottiez, A. Kir’yanov   +7 more
doaj   +1 more source

Ultrafast saturable absorption dynamics in hybrid graphene/Si3N4 waveguides

APL Photonics, 2019
We study the nonlinear optical properties of graphene integrated onto Si3N4 waveguides under picosecond and subpicosecond pulsed excitation at telecom wavelength. Saturable absorption of graphene under guided-mode excitation is measured, and the temporal
Pierre Demongodin, Houssein El Dirani, Jérémy Lhuillier, Romain Crochemore, Malik Kemiche, Thomas Wood, Ségolène Callard, Pedro Rojo-Romeo, Corrado Sciancalepore, Christian Grillet, Christelle Monat   +10 more
doaj   +1 more source

Exciton Binding Energy Modulation in 2D Perovskites: A Phenomenological Keldysh Framework

Advanced Functional Materials, EarlyView.
The intrinsic screening effects are successfully decoupled from structural distortion by rigorously designing a series of 2D perovskites. This enabled us to demonstrate how the dielectric environment modulates the quasiparticle bandgap and exciton binding energy.
Kitae Kim, Namhee Kwon, Sang Woo Park, Wonsik Kim, Seunghwan Kim, Eunki Yoon, Aelim Ha, Donggyu Lee, Young Yong Kim, Jong‐Cheol Lee, Sungho Lee, Junghan Lee, Kyu Hyoung Lee, Yeonjin Yi, Ki‐Ha Hong, Soohyung Park   +15 more
wiley   +1 more source