These modes dominate the vibrational density of states in that frequency range. In the lead glass, despite a strong modification of the SiO 4 network as compared to pure silica, the results indicate that the low-frequency density of states might also be dominated by hyper-Raman active modes....
Hyper-Raman measurements on Pb(Mg1∕3Nb2∕3)0.73Ti0.27O3 (PMN-27%PT) in a temperature range between 513 K and 873 K revealed the existence of two vibrational modes below 50 cm−1 and a central peak. Both modes soften with decreasing temperature. The squared frequency of the lower fre...
Hyper-Raman measurements on $mathrm{Pb}{({mathrm{Mg}}_{1∕3}{mathrm{Nb}}_{2∕3})}_{0.73}{mathrm{Ti}}_{0.27}{mathrm{O}}_{3}$ (PMN-27%PT) in a temperature range between $513phantom{rule{0.3em}{0ex}}mathrm{K}$ and $873phantom{rule{0.3em}{0ex}}mathrm{K}$ revealed the ...
In particular, hyper-Raman spectra can provide vibrational information on molecules where ordinary Raman scattering is suppressed due to symmetry issues (silent modes, non Raman-active modes). The scattering rate can be substantially enhanced near optical surfaces....
Raman, J.S., Seevanayagam, S., Storer, M., Power, J.M.: Combined endocardial and epicardial radiofrequency ablation of right and left atria in the treatment of atrial fibrilla- tion. Ann. Thorac. Surg. 72, 1096–1099 (2001) 3. Rosenberg, L.B.: Virtual fixtures: Perceptual tools...
Tightly trapped acoustic phonons in photonic crystal fibres as highly nonlinear artificial Raman oscillators. Nature Phys. 5, 276–280 (2009). Article ADS Google Scholar Kang, M., Butsch, A. & Russell, P. Reconfigurable light-driven opto-acoustic isolators in photonic crystal fibre. Nature ...
Experimental studies of hyper-Raman scattering (HRS) in inorganic oxide glasses are reported. The observation of dipole-active modes in HRS shows the strong dependence of vibrational spectra on both the value and orientation of momentum transferred to the vibrational system. The conservation of momentu...
By comparing HRS to Raman scattering (RS) and infrared absorption spectra we verify that the IR-active vibrational modes of the target molecules are observed in HRS spectra but come with substantially different peak intensities. The HRS of the biomolecules as well as water, dimethyl sulfoxide, ...
These excessive VDOS manifests itself in the incoherent inelastic neutron scattering or the Raman spectra as the Boson peak, between 2 and 10 meV. Its intensity depends on temperature, pressure, density, and chemical composition. Although the Boson peak is related to the intermediate-range order,...
For simple carbonyl complexes, counting the number of IR and Raman CO stretching frequencies will often permit one to make a structural assignment. The number of CO stretches expected for possible geometries/isomers can be predicted using group theory and the calculated results compared to the experi...