Results 31 to 40 of about 1,443 (165)

Picosecond laser ultrasonics for imaging of transparent polycrystalline materials compressed to megabar pressures

Ultrasonics, 2016
Picosecond laser ultrasonics is an all-optical experimental technique based on ultrafast high repetition rate lasers applied for the generation and detection of nanometric in length coherent acoustic pulses. In optically transparent materials these pulses can be detected not only on their arrival at the sample surfaces but also all along their ...
Maju Kuriakose, Samuel Raetz, Nikolay Chigarev, Sergey M. Nikitin, Alain Bulou, Damien Gasteau, Vincent Tournat, Bernard Castagnede, Andreas Zerr, Vitalyi E. Gusev   +9 more
openaire   +4 more sources

Picosecond laser ultrasonic measurements of interlayer elastic properties of 2H-MoSe2 and 2H-WSe2

Materials Today Chemistry, 2020
Abstract We have used the ultrafast pump-probe technique known as picosecond ultrasonics to generate and detect coherent acoustic phonon pulses with frequencies reaching 40 GHz in exfoliated crystals of MoSe2 and WSe2 on Si and sapphire substrates.
E. Thompson, E. Manzella, E. Murray, M. Pelletier, J. Stuligross, B.C. Daly, S.H. Lee, R. Redwing   +7 more
openaire   +2 more sources

The effect of dynamical compressive and shear strain on magnetic anisotropy in a low symmetry ferromagnetic film [PDF]

, 2017
Dynamical strain generated upon excitation of a metallic film by a femtosecond laser pulse may become a versatile tool enabling control of magnetic state of thin _lms and nanostructures via inverse magnetostriction on a picosecond time scale.
A M Kalashnikova, A S Salasyuk, A V Akimov, A V Scherbakov, A W Rushforth, Atulasimha J, Bowe S, D R Yakovlev, Gurevich A G, J Jäger, Landau L D, Lide D R, M Bayer, Shelukhin L A, T L Linnik, V N Kats   +15 more
core   +3 more sources

Nonlinear acousto-magneto-plasmonics

, 2016
We review the recent progress in experimental and theoretical research of interactions between the acoustic, magnetic and plasmonic transients in hybrid metal-ferromagnet multilayer structures excited by ultrashort laser pulses.
Makarov, Denys, Melnikov, Alexey, Nelson, Keith A., Pezeril, Thomas, Razdolski, Ilya, Seletskiy, Denis, Temnov, Vasily V.   +6 more
core   +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

Characterization of Amorphous Tantalum Oxide for Insulating Acoustic Mirrors [PDF]

, 2011
This work describes the assessment of the acoustic properties of sputtered tantalum oxide films intended as high impedance films for the acoustic isolation of bulk acoustic wave devices operating in the GHz frequency range.
Capilla Osorio, José, Clement Lorenzo, Marta, Devos, Arnaud, Iborra Grau, Enrique, Olivares Roza, Jimena, Sangrador García, Jesús   +5 more
core   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

High resolution 3D imaging of living cells with sub-optical wavelength phonons [PDF]

, 2016
Label-free imaging of living cells below the optical diffraction limit poses great challenges for optical microscopy. Biologically relevant structural information remains below the Rayleigh limit and beyond the reach of conventional microscopes.
A Danielli, AA Maznev, AR Kherlopian, BA Atef Gadalla, C Rossignol, C Sparrow, C Thomsen, C Thomsen, C Zhang, E Weiss, EM Strohm, EM Strohm, F Lanni, F Palombo, F Pérez-Cota, F Zernike, G Rothmund, G Scarcelli, G Scarcelli, H Kwok, HX You, JW Lichtman, K König, LS De Clerck, MJ Rust, MS Muha, O Matsuda, PA Elzinga, RJ Smith, RJ Smith, S Danworaphong, S Nawaz, T Dehoux, T Kundu, U Müller, UV Nägerl, W Chen, W Choi   +37 more
core   +1 more source

The Dynamics of Interfacial Trap States in High‐Detectivity Near‐Infrared Photomultiplication Organic Photodetectors

Advanced Functional Materials, EarlyView.
Photomultiplication organic photodetectors (PM OPDs) are an attractive strategy for health‐monitoring. Here, PM‐OPDs are reported with a specific detectivity of 5.7 × 1012 Jones and external quantum efficiency values of 3500% under −10 V. The dynamics of carrier trapping in these devices are elucidated through trap selective spectroscopical techniques.
Marie Houot, Zhuoran Qiao, Beier Hu, Davide Nodari, Francesco Furlan, Filip Aniés, Yicheng Yang, Martin Heeney, Artem A. Bakulin, Nicola Gasparini   +9 more
wiley   +1 more source

Excited-State Dynamics of Carbazole and tert-Butyl-Carbazole in Thin Films

Photochem
Thin films of carbazole (Cz) derivatives are frequently used in organic electronics, such as organic light-emitting diodes (OLEDs). Because of the proximity of the Cz units, the excited-state relaxation in such films is complicated, as intermolecular ...
Konstantin Moritz Knötig, Domenic Gust, Kawon Oum, Thomas Lenzer   +3 more
doaj   +1 more source