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 10 of 10 for “"spontaneous Raman scattering"”.
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MONITORING PHONON DYNAMICS IN QUANTUM MATERIALS BY TIME-RESOLVED SPONTANEOUS RAMAN SCATTERING
… quantum materials, employing time-resolved spontaneous Raman spectroscopy (TRRS) as the primary experimental approach. Among ultrafast spectroscopies, TRRS provides unique access to phonons and other low-energy excitations in systems impulsively driven into transient non-equilibrium states, …
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Enhancement and extinction effects in surface-enhanced stimulated Raman spectroscopy
Surface-enhanced Raman spectroscopy (SERS) is a technique that allows one to probe the vibrational modes of molecules with great precision. However, current methods involve the enhancement of local fields from spontaneous Raman scattering near a metallic substrate. By utilizing stimulated Raman …
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Nonlinear interferometric vibrational imaging for applications in the study and diagnosis of breast cancer
… its diagnosis in early stages of development. Spontaneous Raman scattering microscopy studies on human breast pathologies have led to models that characterize normal and cancerous breast tissue. This technique, however, is weak and requires long integration times, making it problematic as a …
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Discrete frequency chemical imaging with stimulated Raman scattering microscopy
… dissolved analyte in a fluidic system. Coherent Raman scattering (CRS) spectroscopies have gained increasing attention in recent years, as they represent a class of techniques which affords high-resolution, z-stack capable, not-perturbative, rapid chemical imaging. Stimulated Raman scattering …
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Raman Spectroscopy Of Glasseswith High And Broad Raman Gain In The Boson Peak Region
This thesis investigates Raman spectra of novel glasses and their correlation with structure for Raman gain applications. Raman gain for all-optical amplification by fibers depends significantly on the cross section for spontaneous Raman scattering allowing to compare signal strength and spectral …
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Flame stabilization and mixing characteristics in a stagnation point reverse flow combustor
… OH PLIF, chemiluminescence imaging, PIV and Spontaneous Raman Scattering. Results indicate that the combustor is primarily stabilized in a region downstream of the injector that is characterized by low average velocities and high turbulence levels; this is also the region where most of the …
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High Gain / Broadband Oxide Glasses For Next Generation Raman Amplifiers
Interest in Raman amplification has undergone a revival due to the rapidly increasing bandwidth requirements for communications transmission, both for long haul and local area networks, and recent developments in the telecom fiber industry and diode laser technology. In contrast to rare earth doped …
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Laseroptische Untersuchungen des Verbrennungsprozesses in einem PKW-Dieselmotor
… the late mixture-controlled combustion phase the Spontaneous Raman Scattering (SRS) could be applied successfully for determination of temperature and mole fraction distribution of oxygen and carbon dioxide above the piston bowl. From the results it can be reasoned, that soot emissions must …
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Development and Application of Gas-phase Raman Spectroscopy Techniques for Analysis of Carbon Nanotube Synthesis Processes
… of synthesis parameters. In this study, two Raman-based spectroscopic techniques were tested for the realisation of in situ measurements in a FC-CVD reactor. Cavity-enhanced Raman spectroscopy (CERS) was found to be a powerful low-cost high-resolution tool for analysis of non-reacting gaseous …
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Nebulizer facilitated molding of freeform 3D printed sacrificial scaffolds for breast tumor microenvironment tissue engineering
… with media. Using a combination of stimulated Raman scattering (SRS) microscopy and X-ray computed tomography, the coating was characterized to assess surface roughness and consistency. Colorimetric measurements of dissolution rates allowed optimization of sprayer parameters, yielding a …