Results 61 to 70 of about 41,207 (287)

Generation of coherent phonons in bismuth by ultrashort laser pulses in the visible and NIR: displacive versus impulsive excitation mechanism

, 2011
We have applied femtosecond pump-probe technique with variable pump wavelength to study coherent lattice dynamics in Bi single crystal. Comparison of the coherent amplitude as a function of pump photon energy for two different in symmetry Eg and A1g ...
Chekalin, S. V., Melnikov, A. A., Misochko, O. V.   +2 more
core   +1 more source

From Clinic to Computation: Multiscale Bioengineering Strategies for Durable Biological Aortic Valve Replacements

Advanced Functional Materials, EarlyView.
Bioprosthetic aortic valves have revolutionized the treatment of aortic stenosis, but their durability is limited by structural valve deterioration (SVD). This review focuses on the pericardial tissue at the heart of these valves, examining how its mechanical properties and calcification drive fatigue and failure.
Gabriele Greco, Pierfrancesco Gaziano, Serena Anglese, Simone Morganti, Carlo de Vincentiis, Ferdinando Auricchio, Michele Marino, Michele Conti   +7 more
wiley   +1 more source

A high-rate source for single photons in a pure quantum state

New Journal of Physics, 2013
We report on the efficient generation of single photons, making use of spontaneous Raman scattering in a single trapped ion. The photons are collected through in-vacuum high-numerical-aperture objectives. Photon frequency, polarization and temporal shape
C Kurz, J Huwer, M Schug, P Müller, J Eschner   +4 more
doaj   +1 more source

Hyperfine Coherence in the Presence of Spontaneous Photon Scattering

, 2005
The coherence of a hyperfine-state superposition of a trapped $^{9}$Be$^+$ ion in the presence of off-resonant light is experimentally studied. It is shown that Rayleigh elastic scattering of photons that does not change state populations also does not ...
A. Ben-Kish, B. Blakestad, B. DeMarco, C. Cohen-Tannoudji, C. Langer, D. Hume, D. Leibfried, D. Wineland, D. J. Wineland, J. Britton, J. Chiaverini, J. Jost, L. Allen, P. Schmidt, R. Loudon, R. Ozeri, R. A. Cline, T. Rosenband, W. Itano   +18 more
core   +1 more source

Label-Free Live-Cell Imaging of Nucleic Acids Using Stimulated Raman Scattering Microscopy [PDF]

, 2012
Imaging of nucleic acids is important for studying cellular processes such as cell division and apoptosis. A noninvasive label-free technique is attractive.
Basu, Srinjan, Daniele, Joseph R., Freudiger, Christian Wilhelm, Fu, Dan, Holtom, Gary R., Roeffaers, Maarten B. J., Xie, Xiaoliang Sunney, Zhang, Xu   +7 more
core   +1 more source

Single‐ and Dual‐Atom Configurations in Atomically Dispersed Catalysts for Lithium–Sulfur Batteries

Advanced Functional Materials, EarlyView.
Single‐atom and dual‐atom‐based atomically dispersed catalysts (ADCs) effectively address the shuttle effect and sluggish redox kinetics in Li–S batteries. With nearly 100% atomic utilization and tunable coordination environments, ADCs enhance LiPSs adsorption, lower conversion barriers, and accelerate sulfur redox reactions.
Haoyang Xu, Zhenfeng Li, Yue Fei, Ali Mohammadi, Ge Li   +4 more
wiley   +1 more source

Development of the first Raman scattering thermometry during the first stage ignition in a rapid compression machine and determination of detection limits for NO-LIF

Applications in Energy and Combustion Science, 2023
The interaction of recirculated NOX with two-stage fuels in the early combustion process is not fully understood, especially at lower temperatures. Recently developed kinetic combustion models try to reproduce these interactions.
Raphael Dewor, Christian Schulz, Rene Daniel Büttgen, Thorsten Brands, Karl-Alexander Heufer, Hans-Jürgen Koß   +5 more
doaj   +1 more source

Transient coherent Raman scattering in the time and frequency domain [PDF]

, 1980
A new type of Raman spectroscopy is presented: After transient excitation of molecular modes coherently scattered Raman spectra are investigated in a depayed probing experiment.
Akhmanov, Carman, Giordmaine, Kamga, Laubereau, Laubereau, Maker, Penzkofer, Song, W. Zinth, Zinth, Zinth, Zinth, Zinth   +13 more
core   +1 more source

Observation of Two‐Photon Resonant Raman Scattering via the Biexciton Level in Two‐Dimensional Halide Perovskite (C6H5C2H4NH3)2PbI4

Advanced Functional Materials, EarlyView.
Efficient two‐photon resonant Raman scattering (TRRS) is observed in the layered perovskite (PEA)2PbI4, with the biexciton level acting as an intermediate state. TRRS undergoes two‐photon frequency shift upon input frequency tuning, persists up to 90 K, and shows clear threshold behavior and polarization selection rules.
Seung Han Shin, Seo Hyun Nam, Jeehong Park, Dong Gyu Lee, Jeong Bin Cho, Tae Jung Kim, Yeonjin Yi, Joon Ik Jang   +7 more
wiley   +1 more source

Spontaneous and Stimulated Raman Scattering near Metal Nanostructures in the Ultrafast, High-Intensity regime

, 2013
The inclusion of atomic inversion in Raman scattering can significantly alter field dynamics in plasmonic settings. Our calculations show that large local fields and femtosecond pulses combine to yield: (i) population inversion within hot spots; (ii ...
de Ceglia, D., Grande, M., Haus, J. W., Scalora, M., Vincenti, M. A.   +4 more
core   +1 more source