Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 333 for “"Raman Scattering"”.
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Raman Scattering From Metals
Made available in DSpace on 2015-05-13T15:22:07Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7726681.PDF: 7183986 bytes, checksum: babebdd7c0d32064a686f3790ecb3ecf (MD5) Previous issue date: 1977
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Backward stimulated raman scattering
… an experimental investigation of the stimulated Raman effect. A new prediction is made for the steady state linewidth of the forward Stokes output in the presence of a depleted pump. The theory is developed with the aim of gaining an understanding of the mechanism which favours stimulated Raman …
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Resonant Raman scattering in graphene
… the formulation of a rigorous theory of resonant Raman scattering in graphene, the calculation of the so-obtained Raman matrix element K2f,1o for the 2D Raman mode with the full inclusion of the matrix elements and a physically appealing bridge between theory and experiment by eschewing the …
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Raman Scattering in GaN and ZnO
The Micro-Raman scattering technique has been used for the study of GaN and ZnO. Capabilities of the Raman technique and existing literature on Raman spectroscopy in GaN and ZnO are reviewed. About 50 GaN and ZnO samples with a wide range of properties are studied. From the analysis of positions of …
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Raman scattering in mixed crystal semiconductors
… substitutional disorder on the inelastic light scattering by phonons in three semiconductor alloys; (GaSbh-x(Ge2)x, GaAsxSbl-x' and AlxGal-xAs. We measure the asymmetric broadening and shifting of the longitudinal optic (LO) phonon lines as a function of disorder and observe scattering from …
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Ultrafast Raman Scattering in Plasmonic Nanocavities
… laser illumination, I find that surface-enhanced Raman scattering can significantly increase the phonon population above the thermal equilibrium. This vibrational pumping leads to non-linear anti-Stokes scattering observable at room temperature. Further, the optomechanical coupling induces a …
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High pressure surface enhanced Raman scattering spectroscopy
Surface-enhanced Raman scattering spectroscopy (SERS) was combined with the diamond anvil cell technique to study molecular monolayers and single molecules under high pressure. Vibrational spectra up to 8 GPa were obtained for self-assembled monolayers (SAMs) of the energetic material simulant …
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Raman Scattering From the Superconductor Niobium-Diselenide
… charge density wave (CDW) state. The Raman spectrum shows amplitude modes of A and E symmetry near 40 cm('-1) induced by the CDW. At 7 K this material becomes superconducting, and at 2 K we observe additional Raman peaks near 20 cm('-1), one each of A and E symmetry. These are close in …
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Impurity Induced Raman Scattering in Alkali-Halides
Made available in DSpace on 2015-05-12T22:38:42Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7121187.PDF: 4307589 bytes, checksum: a16c61f853cf6f2cca136e5672a8f867 (MD5) Previous issue date: 1971
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Impurity induced Raman scattering in alkali halides
Raman scattering has been observed in KBR and KI single crystals doped with hydrogen and deuterium U centers, and NaCl containing silver and copper impurities. An argon ion laser, tandem double monochromator, and photoelectric detection were used for the measurements. Raman scattering from the …
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Raman scattering from the superconductor niobium diselenide
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T16:26:56Z No. of bitstreams: 1 1980_sooryakumar.pdf: 4894483 bytes, checksum: b83932506b44613e06df11d7e7ea27fd (MD5)
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Raman scattering in heavy rare earth metals
Inelastic light scattering spectra were measured in MBE grown single crystal films of Dysprosium, Erbium and yttrium. In order to measure the weak Raman signals of metals a single grating monochromator was designed and constructed and added to an existing double grating monochromator to improve the …
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Fresnoite examined by circularly polarized Raman scattering.
Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1978
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Raman scattering in free standing porous Si films
In this thesis, Raman Scattering of free standing porous silicon on sapphire samples of controllably varying porosity is studied. The free standing, fully crystalline porous silicon films were prepared by electrochemical etching and the porous structure were lifted-off by a procedure based on …
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Raman scattering studies of spinels CoV2O4 and MnV2O4
In this thesis, I present Raman scattering studies of the strongly correlated spinels CoV2O4 and MnV2O4. In CoV2O4, exclusive attention is given to a triply degenerate (T2g) phonon in order to determine the material's structural properties and explore coupling between the lattice and other degrees …
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Surface Enhanced Raman Scattering Studies in Ultrahigh Vacuum
We have observed Raman scattering signals from carbon monoxide adsorbed on silver films deposited on a 120 K substrate that are approximately 5 orders of magnitude stronger that would be expected from the known cross section. These studies were performed in an ultrahigh vacuum chamber. This …
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Large-shift Raman scattering in insulating cuprate materials
… thesis describes the use of large-shift ordinary Raman techniques to probe features near the charge-transfer gap in insulating cuprate materials, including the T' phase materials (R2Cu04, R=Gd, Eu, Sm, Nd, Pr), T phase La2Cu04, and 123 phase PrBa2Cu3Cu06 and YBa2Cu3Cu06+x· For all of these …
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Resonance raman scattering studies of GaAs-A1As superlattices
"We have made resonance Raman scattering studies of folded LA phonons and quantized LO phonons in several GaAs-AlAs superlattices. The motivation for this work was to study the electronic structure and the electron-phonon interaction in these structures. The samples were not intentionally doped. …
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Advances in Stimulated Raman Scattering Microscopy via Deep Learning
Stimulated Raman scattering (SRS) microscopy is a powerful chemical imaging technique that acquires images based on the vibrational-spectral “fingerprints” of molecules within an imaged field of view often without the need for exogenous fluorophores or labels. SRS microscopy has found an …
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DNA diagnostic assays using Surface Enhanced Raman Scattering (SERS)
… surfaces, which generate strong surface enhanced Raman scattering (SERS) responses through specific hybridisation events which correlate to the presence of targeted sequences. During this study, the attraction of oligonucleotides onto metal nanoparticles was shown to be driven through the DNA …
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