Results 71 to 80 of about 116,825 (204)

Coherent generation of symmetry-forbidden phonons by light-induced electron-phonon interactions in magnetite

, 2017
Symmetry breaking across phase transitions often causes changes in selection rules and emergence of optical modes which can be detected via spectroscopic techniques or generated coherently in pump-probe experiments.
Arrell, Christopher, Baldini, Edoardo, Borroni, Simone, Carbone, Fabrizio, Katukuri, Vamshi M., Kozlowski, Andrzej, Legut, Dominik, Lorenzana, José, Mann, Andreas, Oleś, Andrzej M., Parlinski, Krzysztof, Piekarz, Przemyslaw, Teyssier, Jérémie, van Mourik, Frank, Yazyev, Oleg V.   +14 more
core   +1 more source

Monitoring the low doping regime in graphene using Raman 2D peak-splits: Comparison of gated Raman and transport measurements [PDF]

, 2019
Avoiding charge density fluctuations and impurities in graphene is vital for high-quality graphene-based devices. Traditional characterization methods require device fabrication and electrical transport measurements, which are labor-intensive and time ...
Barton, David, Chen, Zhuofa, Swan, Anna, Ullberg, Nathan, Vutukuru, Mounika   +4 more
core   +1 more source

Surface enhanced Raman scattering (SERS) in the visible range on scalable aluminum-coated platforms

Chemical Communications, 2018
Combining submicrometer-sized 3D structures with Al roughness for the development of sustainable SERS substrates.
Manuel Gómez, Shima Kadkhodazadeh, Massimo Lazzari   +2 more
openaire   +5 more sources

Nonresonant inelastic light scattering in the Hubbard model

, 2002
Inelastic light scattering from electrons is a symmetry-selective probe of the charge dynamics within correlated materials. Many measurements have been made on correlated insulators, and recent exact solutions in large dimensions explain a number of ...
A. Georges, A. Khurana, B.S. Shastry, B.S. Shastry, F. Venturini, H.R. Krishna-murthy, H.R. Krishna-murthy, J. K. Freericks, J. Kosztin, J.C. Hubbard, J.G. Naeini, J.K. Freericks, J.K. Freericks, J.K. Freericks, J.K. Freericks, K.G. Wilson, M. Jarrell, M. Opel, M. Rübhausen, M.Z. Hasan, M.Z. Hasan, O. Sakai, P. Abbamonte, R. Bulla, R. Bulla, R. Bulla, R. Bulla, R. Bulla, S. Sugai, T. Katsufuji, T. P. Devereaux, T.A. Costi, Th. Pruschke, Th. Pruschke, Th. Pruschke, Th. Pruschke, W. Metzner, X.K. Chen, Y.-K. Kim   +38 more
core   +1 more source

Spectrally tailored narrowband pulses for femtosecond stimulated Raman spectroscopy in the range 330-750 nm

Optics Express, 2013
Spectral compression of femtosecond pulses by second harmonic generation in the presence of substantial group velocity dispersion provides a convenient source of narrowband Raman pump pulses for femtosecond stimulated Raman spectroscopy (FSRS). We discuss here a simple and efficient modification that dramatically increases the versatility of the second
PONTECORVO, Emanuele, FERRANTE, CARINO, Christopher George Elles, SCOPIGNO, TULLIO   +3 more
openaire   +2 more sources

Fluorescence Guided Raman Spectroscopy enables the training of robust support vector machines for the detection of tumour marker proteins

Scientific Reports
Raman spectroscopy provides comprehensive biochemical information on a sample’s composition, yet it is often used to analyze aggregated spectra rather than specific shifts.
Johannes Reifenrath, Benjamin Gardner, Alexander Gigler, Friederike Liesche-Starnecker, Suzy Eldershaw, Nick Stone, Jürgen Schlegel   +6 more
doaj   +1 more source

Raman Spectrum Characteristics of Organic Matter in Silurian Longmaxi Formation Shale of Well Anye-1 and Its Geological Significance

Yankuang ceshi, 2019
BACKGROUND The higher thermal maturity of organic matter and the shortage of terrestrial plants are the main characteristics of Lower Paleozoic marine shale in China, which results in the difficulty of distinguishing macerals.
ZHANG Cong, XIA Xiang-hua, YANG Yu-ru, BAI Ming-gang, DAI Feng, XIONG Jie   +5 more
doaj   +1 more source

Fabrication and Characterization of Topological Insulator Bi$_2$Se$_3$ Nanocrystals

, 2011
In the recently discovered class of materials known as topological insulators, the presence of strong spin-orbit coupling causes certain topological invariants in the bulk to differ from their values in vacuum.
A. D. LaForge, C. Beekman, D. Kwok, J. E. J. Bashucky, K. S. Burch, L. J. Sandilands, N. Lee, Peng H., S. W. Cheong, S. Y. F. Zhao   +9 more
core   +1 more source

Tropical rainforest bird community structure in relation to altitude, tree species composition, and null models in the Western Ghats, India

, 2005
Studies of species distributions on elevational gradients are essential to understand principles of community organisation as well as to conserve species in montane regions.
Joshi, N. V., Raman, T. R. Shankar, Sukumar, R.   +2 more
core  

Relaxation oscillations, stability, and cavity feedback in a superradiant Raman laser

, 2013
We experimentally study the relaxation oscillations and amplitude stability properties of an optical laser operating deep into the bad-cavity regime using a laser-cooled $^{87}$Rb Raman laser.
A. E. Siegman, James K. Thompson, Joshua M. Weiner, Justin G. Bohnet, Kevin C. Cox, Zilong Chen   +5 more
core   +1 more source