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 23 for “"coherent anti-Stokes Raman scattering"”.
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Applications of femtosecond coherent anti-stokes Raman scattering in combustion
… development of chirped-probe-pulse femtosecond coherent anti-Stokes Raman spectroscopy (CPP fs-CARS) for applications of gas phase thermometry and extension to methane concentration measurements. The main effort has been to assess the usefulness and robustness of the technique in turbulent …
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Developing Single-Laser Sources for Multimodal Coherent Anti-Stokes Raman Scattering Microscopy
Coherent anti-Stokes Raman scattering (CARS) microscopy has developed rapidly and is opening the door to new types of experiments. This work describes the development of new laser sources for CARS microscopy and their use for different applications. It is specifically focused on multimodal …
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Polarization Controlled Coherent Anti-Stokes Raman Scattering Microscopy for Determination of Structural Order of the Myelin Sheath
Coherent Anti-Stokes Raman Scattering (CARS) is a laser-scanning microscopy technique that generates a strong label-free signal in lipid. The myelin sheath surrounding nerves is up to 80% lipid, and therefore is an ideal candidate for CARS imaging. The long lipid chains forming the myelin wraps …
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Experimental Measurements of Pressure, Temperature, and Density Using High-Resolution N(2) Coherent Anti-Stokes Raman Scattering
… P/T/p measurements are compared to similar quantities extracted from a RANS CFD simulation. The agreement between the mean CARS measurements and CFD predictions along the jet centerline and radial traverses is generally excellent. This CARS technique is able to capture the low-pressure and …
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Experimental and Theoretical Investigations of Coherent Anti -Stokes Raman Scattering as a Nonintrusive Diagnostic for Gas -Phase Systems
… This model incorporates the effects of the Raman resonance in conjunction with an electronic resonance to provide the first known theoretical predictions for NO. To determine the model's accuracy and effectiveness, predictions were compared to previously obtained experimental data. The …
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Vibrational Dynamics in Disordered Molecular Crystals by Picosecond Coherent Raman and Photon Echo Spectroscopies (Exciton, Low Temperature)
… at low temperature by picosecond time-delayed Coherent Anti-Stokes Raman Scattering (psCARS) and photon echo spectroscopy (PE).
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Laser diagnostic investigation of the structure of steady and driven hydrogen jet diffusion flames
… jet diffusion flames has been investigated using coherent anti-Stokes Raman scattering (CARS) and laser-induced fluorescence (LIF) to obtain temperature and nitric oxide (NO) concentrations in steady laminar flames and during the interaction of induced fuel-side vortices with the diffusion flame …
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Experimental Investigation of a Lean, Premixed Gas Turbine Combustor Using Advanced Laser Diagnostics
… temperature measurements were made using coherent anti-Stokes Raman scattering at the two pressure drop conditions with an equivalence ratio of 0.7. Time-resolved measurements were made at twenty spatial locations at each condition. Temperatures were below those expected based on previous …
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Nonlinear interferometric vibrational imaging for applications in the study and diagnosis of breast cancer
… 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 clinical …
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Coherent anti-Stokes Raman spectroscopy of diamond
Experiments were performed to investigate Coherent Anti-Stokes Raman Scattering (CARS) in diamond. Aspects of this type of non-linear scattering are presented theoretically, and various experimental configurations were attempted in order to study them. These included the dependence of the CARS …
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Advanced optical microscopy toolkits for non-invasive imaging in oncology
… as well as cellular morphology using coherent Raman scattering (CRS) imaging techniques in the stratum corneum, the most superficial layer of the epidermis; (3) using photoconvertible labels to optically tag cell sub-populations of interest in situ for long-term monitoring of …
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Investigation of stagnation-flow diamond-forming flames using advanced laser diagnostics
… Scanning electron microscopy and surface Raman spectroscopy verified the quality and uniformity of the diamond films deposited with this flame. Coherent anti-Stokes Raman scattering (CARS) spectroscopy of hydrogen was used to measure temperature profiles between the substrate and the …
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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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Nonlinear Microscopy for Material Characterization
… solvents. Mathematical modeling of resonant coherent anti-Stokes Raman scattering (CARS), coherent Stokes Raman scattering (CSRS) and stimulated parametric emission (SPE) processes supplement the FWM studies and suggest a resonant CARS process that accounts for ~95% of the total visible FWM …
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Oh cryoprotectant, wherefore art thou cryoprotectant? Investigation of the permeation of common cryoprotectants into live rice callus cells by coherent Raman microscopy
… these mixtures. Vibrational microscopies, like Raman or infrared microscopy, allow the direct visualization of cryoprotectants interacting with living cells. By exciting vibrations unique to the bonds in a molecule, these techniques can effectively image nearly unadulterated molecules. Through …
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Optical spectroscopy and langmuir probe diagnostics of microwave plasma in synthesis of graphene-based nanomaterials
… vapor deposition reactor has been studied. ^ Coherent anti-Stokes Raman scattering spectroscopy was used to probe the H<sub>2</sub> molecules in the plasma under various parametric conditions. The rotational temperature of H<sub>2</sub> was found to increase with reactor pressure, plasma …
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Imaging biological water permeability barriers using CARS microscopy
… specificity and spatial resolution. Coherent anti-Stokes Raman scattering (CARS) microscopy, offers a means to visualize the water permeability barrier of biological structures at high resolution within intact systems. In this thesis, water CARS imaging was characterized for …
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Surface functionalized iron oxide nanoparticles for applications in biomedical sciences
… based on impedance (xCELLigence system) and Coherent Anti-Stokes Raman Scattering (CARS) were used to analyze the cell toxicity. The results showed that those methods provided a much deeper insight into the cell viability and proliferation of HepaRG cells. Furthermore, valuable data on the …
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