Results 41 to 50 of about 817,623 (294)

Sum-frequency ionic Raman scattering

, 2018
In a recent report sum-frequency excitation of a Raman-active phonon was experimentally demonstrated for the first time. This mechanism is the sibling of impulsive stimulated Raman scattering, in which difference-frequency components of a light field ...
Juraschek, Dominik M., Maehrlein, Sebastian F.   +1 more
core   +1 more source

Effect of low-Raman window position on correlated photon-pair generation in a chalcogenide Ge11.5As24Se64.5 nanowire [PDF]

, 2015
We investigated correlated photon-pair generation via spontaneous four-wave mixing in an integrated chalcogenideGe11.5As24Se64.5photonicnanowire. The coincidence to accidental ratio, a key measurement for the quality of correlated photon-pair sources ...
Choi, Duk-Yong, Clark, A. S., Collins, M. J., Eggleton, B. J., Gai, X., He, J, Luther-Davies, B, Madden, S. J., Xiong, C.   +8 more
core   +1 more source

Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter, Felix Drechsler, Till M. J. Stadtmüller, Cameliu Himcinschi, Christos G. Aneziris, Jens Kortus   +5 more
wiley   +1 more source

Influence of chirping the Raman lasers in an atom gravimeter: phase shifts due to the Raman light shift and to the finite speed of light

, 2015
We present here an analysis of the influence of the frequency dependence of the Raman laser light shifts on the phase of a Raman-type atom gravimeter.
Cheng, B., Gillot, P., Merlet, S., Santos, F. Pereira Dos   +3 more
core   +2 more sources

Theory of Raman Scattering from Orbital Excitations in Manganese Oxides [PDF]

, 2001
We present a theory of the Raman scattering from the orbital wave excitations in manganese oxides. Two excitation processes of the Raman scattering are proposed.
B. S. Shastry, E. Saitoh, F. Moussa, G. Khaliullin, G. Khaliullin, G. Matsumoto, I. Solovyev, J. B. Goodenough, J. C. Slater, J. F. Mitchell, J. Inoue, J. Kanamori, J. Rodriguez-Carvajal, J. van den Brink, K. Chahara, K. Hirota, L. F. Feiner, L. F. Feiner, M. Cyrot, M. N. Iliev, P. A. Fleury, R. J. Elliott, R. Maezono, R. von Helmolt, S. Ishihara, S. Ishihara, S. Ishihara, S. Ishihara, S. Ishihara, S. Maekawa, S. Okamoto, S. Okamoto, S. Okamoto, S. Okamoto, S. Satpathy, T. Arima, T. Arima, T. Saitoh, V. Perebeinos, W. E. Pickett, Y. Endoh, Y. Murakami, Y. Tokura, Y. Tokura   +43 more
core   +3 more sources

Coupled Raman-Raman modes in the ionic Raman scattering process

Applied Physics Letters, 2018
We employ a lattice Hamiltonian to examine the dynamics of coupled normal modes excited through a nonlinear phononic process, extending the model beyond infrared and first-order Raman active mode couplings to include interactions between symmetry-allowed Raman active modes.
Mingqiang Gu, James M. Rondinelli
openaire   +2 more sources

Thermophysical Properties of the Desulphurization Slags With Various CaS and CaO/Al2O3 Ratio

Advanced Engineering Materials, EarlyView.
This article investigates how CaS content and the CaO/Al2O3 ratio influence the thermophysical properties of desulphurization slags. Using experimental measurements and thermodynamic simulations, this study reveals complex effects on viscosity, surface tension, and density, providing new insight into slag structure and phase behavior under ...
Eldar Salpagarov, Matheus Roberto Bellé, Anton Yehorov, Julia Richter, Olena Volkova   +4 more
wiley   +1 more source

Multifrequency Raman amplifiers

Physical Review E, 2018
In its usual implementation, the Raman amplifier features only one pump carrier frequency. However, pulses with well-separated frequencies can also be Raman amplified while compressed in time. Amplification with frequency-separated pumps is shown to hold even in the highly nonlinear, pump-depletion regime, as derived through a fluid model, and ...
Barth, Ido, Fisch, Nathaniel J.
openaire   +4 more sources

Characterization of a Recyclate‐Based MgO‐Steel Composite As‐Sintered Inert Anode Candidate After Exposure to Cryolite Electrolysis

Advanced Engineering Materials, EarlyView.
Carbon‐free inert anodes are essential for decarbonizing aluminum electrolysis. This study investigates a recyclate‐based MgO‐316L steel composite anode tested under galvanostatic Hall–Héroult conditions in cryolite at 1000°C. Microstructural analysis reveals selective MgO fluorination, spinel and oxide layer formation, electrolyte infiltration, and ...
Serhii Yaroshevskyi, Alexander Adamczyk, Nora Brachhold, Gert Schmidt, Jana Hubálková, R. Gumeniuk, Alexandros Charitos, Christos G. Aneziris   +7 more
wiley   +1 more source

Cavity-enhanced Raman Microscopy of Individual Carbon Nanotubes [PDF]

, 2016
Raman spectroscopy reveals chemically specific information and provides label-free insight into the molecular world. However, the signals are intrinsically weak and call for enhancement techniques.
Hofmann, Matthias S., Hunger, David, Hänsch, Theodor W., Högele, Alexander, Hümmer, Thomas, Noe, Jonathan   +5 more
core   +2 more sources