Results 261 to 270 of about 93,620 (314)
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Raman scattering in Fibonacci superlattices
Physical Review Letters, 1987Raman scattering from acoustic phonons in Si-${\mathrm{Ge}}_{\mathrm{x}}$${\mathrm{Si}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$ Fibonacci superlattices is reported. The main features of the experimental results are determined by the Fourier components of the dependence on position along the growth direction of the photoelastic coefficient.
, Dharma-wardana +4 more
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1987
This chapter describes the application of stimulated Raman scattering as a practical method for the generation of tunable, coherent radiation. A brief theoretical discussion of the stimulated Raman effect in the steady state and transient-scattering regimes is presented.
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This chapter describes the application of stimulated Raman scattering as a practical method for the generation of tunable, coherent radiation. A brief theoretical discussion of the stimulated Raman effect in the steady state and transient-scattering regimes is presented.
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1996
Abstract It is difficult to provide an overview from the physical standpoint of the enormous number of Raman scattering studies performed under pressure. On the other hand, the experimental aspect seems too simple: only a slight modification of the optical scheme is needed to replace a sample by a high-pressure cell, especially by a ...
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Abstract It is difficult to provide an overview from the physical standpoint of the enormous number of Raman scattering studies performed under pressure. On the other hand, the experimental aspect seems too simple: only a slight modification of the optical scheme is needed to replace a sample by a high-pressure cell, especially by a ...
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Raman scattering tensors of tyrosine
Biospectroscopy, 1998Polarized Raman scattering measurements have been made of a single crystal of L-tyrosine by the use of a Raman microscope with the 488.0-nm exciting beam from an argon ion laser. The L-tyrosine crystal belongs to the space group P2(1)2(1)2(1) (orthorhombic), and Raman scattering intensities corresponding to the aa, bb, cc, ab and ac components of the ...
M, Tsuboi +6 more
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Hole-Enhanced Raman Scattering
Applied Spectroscopy, 2006Stokes and anti-Stokes non-resonant hole-enhanced Raman scattering (HERS) spectra with high signal-to-noise ratio (S/N) are reported for the first time for aqueous phase R6G molecules adsorbed onto random nanoholes in thin gold films. Compared to conventional surface-enhanced Raman scattering from nanometric gold colloid particles,
John T, Bahns +4 more
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Waveguided Raman and Brillouin scattering
SPIE Proceedings, 2000Raman and Brillouin spectroscopy in planar waveguides can be performed by coupling the laser beam to the waveguide with a prism and by collecting the scattered light from the front surface. Brillouin spectra, which are different for excitation in the different modes of the waveguides, can be accounted for by a model that considers the space ...
Montagna, Maurizio +6 more
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Theory of Graphene Raman Scattering
ACS Nano, 2016Raman scattering plays a key role in unraveling the quantum dynamics of graphene, perhaps the most promising material of recent times. It is crucial to correctly interpret the meaning of the spectra. It is therefore very surprising that the widely accepted understanding of Raman scattering, i.e., Kramers-Heisenberg-Dirac theory, has never been applied ...
Heller, Eric +6 more
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Raman scattering of molecular graphenes
Physical Chemistry Chemical Physics, 2009A simplified theoretical approach for modeling the off-resonance Raman scattering of molecular models of confined graphene (polycyclic aromatic hydrocarbons, PAHs) is presented and compared with the results from density functional theory calculations. This theoretical analysis not only allows for a quick estimate of the Raman scattering activity, but ...
TOMMASINI, MATTEO MARIA SAVERIO +2 more
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Enhanced Raman forward scattering
Physical Review E, 1996Recent experiments on laser wake-field acceleration have indicated a dramatically enhanced value of the accelerating field created through the process of the Raman forward scattering instability. However, the use of the Raman forward scattering instability can be improved.
, Fisher, , Tajima
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Surface Enhanced Raman Scattering
Physics Today, 2007The remarkable 14-order-of-magnitude signal enhancement that can occur during Raman scattering from molecules on metallic nanostructures turns the normally weak inelastic-scattering effect into a single-molecule spectroscopic probe.
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