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 55 for “"Infrared laser"”.
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Far-Infrared Laser Action in Water Vapor
Made available in DSpace on 2014-12-08T22:24:17Z (GMT). No. of bitstreams: 1 6801779.pdf: 3596553 bytes, checksum: 71d631938323075b9279deb97ae81068 (MD5) Previous issue date: 1967
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Carbon nanotubes as near infrared laser susceptors
… efficiency of carbon nanotubes with near infrared laser radiation at 940nm wavelength was investigated. Nanotubes treated with different post processing methods were irradiated at different laser power intensities as dry samples and suspensions in water or ethanol. The interaction with the …
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High Power Optically Pumped Far Infrared Laser Sources
Made available in DSpace on 2014-12-12T20:54:16Z (GMT). No. of bitstreams: 1 7606907.pdf: 3679973 bytes, checksum: f3121d01a6da38affdfccb1da45065a5 (MD5) Previous issue date: 1975
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High-Sn-content GeSn Alloy towards Room-temperature Mid Infrared Laser
… Sn composition is highly desirable to cover mid-infrared wavelength. A systematic study of GeSn strain relaxation mechanism and its effects on Sn incorporation during the epitaxy via chemical vapor deposition was conducted. It was discovered that Sn incorporation into Ge lattice sites is limited …
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Infrared Laser Excitation and Fluorescence Spectra: A Study of Intramolecular Vibrational Energy Relaxation
Infrared fluorescence measurements have been used to determine the presence or absence of intramolecular vibrational relaxation (or more precisely state mixing) from an excited C-H stretch in twenty three representative molecules varying in size from methane to norbornene. Included are aliphatic …
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Triple oxygen isotope measurements by tunable infrared laser direct absorption spectroscopy, and applications to ratite eggshell
… isotopes directly in CO2 samples using Tunable Infrared Laser Direct Absorption Spectroscopy (TILDAS). After the introduction and optimization of both the sample preparation and analytical systems, it is applied to fossil ratite eggshell (RES) samples spanning the mid-Miocene through Quaternary …
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Genome analysis: mutation analysis using near infrared laser-induced fluorescence (NIR-LIF) and single molecule detection in microfluidic devices
… from single DNA molecule labeled with near infrared (NIR) dyes. The performance of the system was first tested by applying single photon burst technique to detect double-stranded DNA molecules in polymeric devices. Sampling efficiencies were investigated by physically narrowing the channel …
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Study of Molecular Nitrogen, Helium-Xenon, Argon-Xenon Infrared Laser Systems Excited by an Electron Beam Initiated Gas Discharge
Made available in DSpace on 2014-12-12T20:54:31Z (GMT). No. of bitstreams: 1 7709119.pdf: 7861235 bytes, checksum: 6d604b465e20a201a363f6885b7c74c8 (MD5) Previous issue date: 1976
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An experimental investigation of fuel spray vapor phase characterization
An experimental study of an infrared laser extinction technique for measuring fuel vapor flux in evaporating liquid fuel sprays was conducted. The infrared laser extinction technique consists of three separate measurements: a visible light angular scattering measurement, a visible light …
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Nonlinear optical frequency conversion of mode-locked all-solid-state lasers
… of robust diode-pumped solid-state mode-locked lasers as a platform for nonlinear optical frequency conversion experiments. One objective is to create an ultrashort-pulsed source that is tunable between λ= 600nm and λ= 700nm, since currently no other laser gain media exists that covers this …
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Picosecond Infrared Lasers (PIRL): Applications in Biodiagnostics and Towards Quantitative Mass Spectrometry
A new concept based on the Picosecond Infrared Laser (PIRL) has been introduced to selectively excite water to directly drive ablation of biological tissue faster than any competing energy dissipation process that could damage surrounding tissue. This thesis work showed that this mechanism can be …
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Investigation of the ultrafast fiber and hybrid laser systems and their nonlinear wavelength conversion methods in the infrared spectral region /
Near-infrared and middle-infrared laser sources are desirable for nonlinear microscopy and sum-frequency generation spectroscopy. The main goal of this thesis was to create and improve the technologies and methods required for the development of effective and reliable laser sources operating in …
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Impact of silicon nitride thickness on the infrared sensitivity of silicon nitride-aluminum microcantilevers
… silicon nitride - aluminum bimaterial cantilever infrared sensors. A model predicts cantilever behavior by considering heat transfer within and from the cantilever, cantilever optical properties, cantilever bending mechanics, and thermomechanical noise. Silicon nitride-aluminum bimaterial …
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Design and calibration of an infrared position sensor
… devices was developed and implemented. Using an infrared laser to illuminate the device and an InGaAs photodiode to detect the transmitted radiation, acquisition of the frequency component of motion has been demonstrated. A simple analysis of electromagnetic transmission through silicon was …
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Direct visualization of cold denaturation of cytochrome-C Using Small Angle X-Ray Scattering
… will be suddenly jumped in temperature by an infrared laser to initiate folding. Further, this work validates modifications made to existing protein folding theory.
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Correlative elemental and electrical micro-analysis of laser fired contacts in silicon solar cells
… parity with conventional energy, advances like laser-fired contacts must be adopted to improve cost levers like solar cell efficiency and industrial throughput. This work examines the relationship between laser-processing on the structure and property of solar cells, with the goal of (1) …
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Photoelectron Spectroscopy of highly oriented pyrolytic graphite using intense ultrashort laser pulses
… Pyrolytic Graphite (HOPG) using ultrashort laser pulses. It concentrates on the observation and understanding of a new phenomenon whereby infrared laser pulses of just 1.5eV photon energy can be used to generate photoelectrons with kinetic energies of up to 80eV. Intensity dependence …
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Development of Atomic Force Microscopy Modalities Using Dissipation Signal for Enhancing the Sensitivity of Photo-Induced Force Detection
… force microscopy (PiFM). PiFM relies on an infrared laser (IR) to excite molecular vibrations, and the resulting photo-induced dipole force is detected by the AFM. The IR laser is used to induce a near-field optical force within the tip-sample cavity on the sample surface. One AFM operating …
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Monte Carlo Simulation Of Hole Transport And Terahertz Amplification In Multilayer Delta Doped Semiconductor Structures
… calculated for Ge, Si, and GaAs. A far-infrared laser concept based on intersubband transitions of holes in p-type periodically delta-doped semiconductor films is studied using numerical Monte-Carlo simulation of hot hole dynamics. The considered device consists of monocrystalline pure …
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High harmonic generation by short laser pulses: time-frequency behavior and applications to attophysics
… in which noble gas atoms excited by an intense laser field at frequency ω<sub>1</sub> emit radiation of higher frequencies that are odd integer multiples of ω<sub>1</sub>. Driven by an infrared laser, high harmonic radiation can span from the optical into the extreme ultraviolet (XUV) frequency …
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