Results 61 to 70 of about 1,812 (181)

Evaluation of the Structural Phase Transition in Multiferroic (Bi_1−x Pr_x)(Fe_0.95 Mn_0.05)O₃ Thin Films by A Multi-Technique Approach Including Picosecond Laser Ultrasonics

Applied Sciences, 2019
Picosecond laser ultrasonics is an experimental technique for the generation and detection of ultrashort acoustic pulses using ultrafast lasers. In transparent media, it is often referred to as time-domain Brillouin scattering (TDBS).
Samuel Raetz, Alexey Lomonosov, Sergey Avanesyan, Nikolay Chigarev, Elton de Lima Savi, Alain Bulou, Nicolas Delorme, Zheng Wen, Qiao Jin, Maju Kuriakose, Anthony Rousseau, Gwenaëlle Vaudel, Pascal Ruello, Di Wu, Vitalyi Gusev   +14 more
doaj   +1 more source

High-frequency acousto-optic effects in Bragg reflectors [PDF]

, 2014
Picosecond acoustic interferometry was used to study the acousto-optic properties of a distributed Bragg reflector (DBR) manufactured from two immiscible polymers (cellulose acetate and polyvinylcarbyzole). Picosecond strain pulses were injected into the
A. J. Kent, A. V. Akimov, Akimov, Arcizet, Bailey, Beugnot, Brüggemann, Chan, Cheng, Colvard, D. J. Farmer, Dainese, Ding, Fainstein, Gorishnyy, Groenen, Grudinin, Gröblacher, Hao, J. Bailey, J. S. Sharp, Jusserand, Katsidis, Lin, Lin, Léger, Mahboob, Maldovan, Matsuda, Matsuda, Morath, N. A. Gippius, Pennec, Safavi-Naeini, Salasyuk, Tas, Teufel, Thomsen, Walker, Weis, Wiederhecker, Wright, Wright, Zhang   +43 more
core   +2 more sources

Enhanced Self‐Phase Modulation in Silicon Nitride Waveguides Integrated With 2D MoS2 Films

Advanced Materials Technologies, EarlyView.
ABSTRACT On‐chip integration of 2D materials provides a promising route toward next‐generation integrated optical devices with performance beyond existing limits. Here, significantly enhanced spectral broadening induced by self‐phase modulation (SPM) is experimentally demonstrated in silicon nitride (Si3N4) waveguides integrated with 2D monolayer ...
Shahaz S. Hameed, Di Jin, Aihao Zhao, Jiayang Wu, Junkai Hu, Irfan H. Abidi, Sebastien Cueff, Christian Grillet, Yuning Zhang, Houssein El Dirani, Corrado Sciancalepore, Sebastien Kerdiles, Quentin Wilmart, Sumeet Walia, Christelle Monat, David J. Moss   +15 more
wiley   +1 more source

Double-Sided Terahertz Imaging of Multilayered Glass Fiber-Reinforced Polymer

Applied Sciences, 2017
Polymer matrix composites (PMC) play important roles in modern industry. Increasing the number of such structures in aerospace, construction, and automotive applications enforces continuous monitoring of their condition.
Przemyslaw Lopato
doaj   +1 more source

New Kinds of Acoustic Solitons

, 2007
We find that the modified sine-Gordon equation belonging to the class of the soliton equations describes the propagation of extremely short transverse acoustic pulses through the low-temperature crystal containing paramagnetic impurities with effective ...
Belenov É M, Belenov É M, Eilbeck J C, Eilbeck J C, Kittel C, Kruskal M D, Maimistov A I, Matveev V B, N V Ustinov, Naugolnykh K, Newell A C, S V Sazonov, Sazonov S V, Tucker J W, Zakharov V E   +14 more
core   +1 more source

Phonon engineering with superlattices: generalized nanomechanical potentials [PDF]

, 2019
Earlier implementations to simulate coherent wave propagation in one-dimensional potentials using acoustic phonons with gigahertz-terahertz frequencies were based on coupled nanoacoustic resonators.
Esmann, M., Lanzillotti-Kimura, N. D., Ortiz, O.   +2 more
core   +4 more sources

Disorder‐Induced Extremely Low Thermal Conductivity of Graphite Fluoride

Advanced Science, EarlyView.
This article investigates the effect of fluorination on the thermal conductivity of graphite fluoride, demonstrating the relationship between structural modification and thermal conductivity in an extreme case. The record‐low through‐plane thermal conductivity measured in exfoliated graphite fluoride flakes was found to correlate with the wide ...
Wonsik Lee, Donghoon Moon, Ziyan Qian, Jinwoo Kim, Changheon Kim, Yeojin Lee, Hyobin Yoo, Richard B. Wilson, Qiye Zheng, Gwan‐Hyoung Lee, Hyejin Jang   +10 more
wiley   +1 more source

Thermodynamic properties of liquid mercury to 520 K and 7 GPa from acoustic velocity measurements [PDF]

, 2013
Ultrafast acoustics measurements on liquid mercury have been performed at high pressure and temperature in diamond anvils cell using picosecond acoustic interferometry.
Ayrinhac, S., Bergame, F., Bove, Livia E, Decremps, F., GAUTHIER, M., Le Marchand, G., Morand, Marc, Philippe, J.   +7 more
core   +3 more sources

Energy‐Resolved Femtosecond Dynamics of Plasmon‐Induced Hole Injection at Au/GaN Heterointerfaces

Advanced Science, EarlyView.
We reveal the spectral signature of ultrafast nonthermal hot‐hole transfer at plasmonic heterointerfaces, which reshapes hot‐carrier relaxation dynamics and significantly enhances hydrogen evolution, providing a mechanistic basis for optimizing hot‐carrier utilization in photocatalysis.
Yuying Gao, Yuxin Xie, Jonathan Diederich, Christian Höhn, Klaus Schwarzburg, Fengtao Fan, Can Li, Roel van de Krol, Dennis Friedrich   +8 more
wiley   +1 more source

Effect of picosecond strain pulses on thin layers of the ferromagnetic semiconductor (Ga,Mn)(As,P)

, 2010
The effect of picosecond acoustic strain pulses (ps-ASP) on a thin layer of (Ga,Mn)As co-doped with phosphorus was probed using magneto-optical Kerr effect (MOKE).
A. Lemaître, B. Perrin, B. Perrin, C. Gourdon, C. Testelin, E. Charron, E. Peronne, L. Thevenard, M. Cubukcu, S. Vincent   +9 more
core   +2 more sources