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 29 for “"light pulses"”.
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Capturing atomic and electronic motion with high harmonic generation light pulses
Contains fulltext : 90924.pdf (Publisher’s version ) (Open Access)
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Dynamics of single clusters in intense light pulses studied with ion spectroscopy and light scattering
Die Wechselwirkung von ultrakurzen Laserpulsen mit Nanoteilchen wird gegenwärtig intensiv untersucht. Freie-Elektronen-Laser (FEL) im Röntgenbereich erlauben seit kurzem völlig neuartige Untersuchungen. Durch ihre extrem intensiven Pulse wird es möglich werden nicht-kristalline Partikel mit …
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Ultrafast optical pulse manipulation in three dimensional-resolved microscope imaging and microfabrication
… of lasers with femtosecond, ultrafast light pulses provides new opportunities and challenges in instrument design. This thesis addresses three aspects of utilizing ultrafast light pulses in two-photon excitation microscopy. First, optical fibers are routinely used in many optical …
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Imaging the shapes and dynamics of superfluid helium nanodroplets
… via scattering of extreme-ultraviolet light pulses. In particular, the recent development of free-electron lasers (FELs) delivering intense short-wavelength light pulses of femtosecond duration is a promising prospect for the study of unsupported particles such as proteins, nucleic …
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A direct search for Dirac magnetic monopoles
… monopole trigger at CDF, which requires large light pulses in the scintillators of the time-of-flight system, remains highly efficient to monopoles while consuming a tiny fraction of the available trigger bandwidth. A specialized offline reconstruction checks the central drift chamber for large …
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Two quantum photoconductivity in potassium iodide
… a KDP harmonic generator were used to produce light pulses whose quantum energy is more than half the band gap energy. The phbtbresponse in KI depends upon the square of the incident light intensity. Since the photo carriers are generated nearly uniformly throughout the crystal, the technique …
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Electromagnetically induced transparency by NMR
… nonlinear optical interference effect in which light at a certain frequency makes normally opaque atomic systems transparent to light at another frequency. Recent experiments in Atomic Molecular and Optical (AMO) physics demonstrated how the EIT effect can be used to store light pulses in an …
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Comparative Study of Forward and Diffusely Scattered Light in a Coherently Prepared Ultracold Rubidium Gas
… between forward and diffusely scattered light propagating in a coherently prepared ultracold <sup>87</sup>Rb atomic vapor is presented. This research is part of the ongoing effort to characterize the processes, such as diffusion, that contribute to coherence loss in atomic media under …
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Distributed Pressure and Temperature Sensing Based on Stimulated Brillouin Scattering
… which maybe further improved by using shorter light pulses.
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Theoretical Study of Laser Beam Quality and Pulse Shaping by Volume Bragg Gratings
The theory of stretching and compressing of short light pulses by the chirped volume Bragg gratings (CBG) is reviewed based on spectral decomposition of short pulses and on the wavelength-dependent coupled wave equations. The analytic theory of diffraction efficiency of a CBG with constant chirp …
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Cloning of a <i>CHLAMYDOMONAS REINHARDTII</i> Marker into a RNA Interference Construct to Test Whether the Photoreceptor Chlamyrhodopsin Is Involved in Circadian Clock Resetting
… in plants and animals. Rhodopsins are blue/green-light photoreceptors also found in <i>C. reinhardtii</i>. Chlamyrhodopsin (COP), the most abundant eyespot protein, was reported to have no role in the phototactic and photophobic responses in <i>C. reinhardtii</i>. Its function is yet unknown. <br> …
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Quantum Optics and Quantum Information Processing in Rare-Earth-Ion-Doped Crystals
… on the coherent transient interaction between light and the ions in the crystals. A photon echo experiment has been performed where faint optical pulses were accumulated in the crystal. In this experiment, the possibility of single photons acting as two of the optical fields in the photon echo …
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Plant-Like Cryptochrome Does Not Promote Blue Light-Induced Resetting of the Circadian Clock in <i>Chlamydomonas Reinhardtii</i>
… upon environmental time cues such as the daily light/dark and temperature cycles. The unicellular green alga <em>Chlamydomonas reinhardtii</em> is a useful model organism for circadian clock research. It shows several well-characterized circadian rhythms of behavior, and the monitoring of its …
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Intensyvių femtosekundinių šviesos bangų paketų sklidimo Kero terpėse laikinis ir erdvinis charakterizavimas /
… self-focusing phenomenon of intense femtosecond light pulses in media with cubic nonlinearity is investigated and the origin of formation of light filaments is revealed. In this work, new measurement techniques are introduced and applied experimentally, which allowed high resolution temporal, …
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The molecular dynamics of hydrogen-bonding explored with broadband two dimensional infrared spectroscopy
… Traditional methods for generating short pulses of mid-infrared light are fundamentally limited in the bandwidth they can produce. Oftentimes, the width of a hydrogen-bonded oscillator's absorption resonance exceeds the broadest bandwidth mid-infrared laser pulse. In this thesis, I …
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Three-Dimensional Building Reconstruction from Raw LIDAR Data
… is an advanced surveying technology (also called Light Detection and Ranging - LIDAR) which mounts a laser scanner on an aircraft. The aircraft scans the Earth's surface and captures data by emitting and receiving light pulses transmitted onto the terrain objects. The captured data are in three …
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Multiphysics simulations of magnetic nanostructures
… such as using spin polarised currents or light pulses. The field of magnetism is thus moving towards the multiphysics direction, since it is increasingly studied in conjunction with other types of physics, such as electric and spin transport, electromagnetic waves generation and …
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An ultraviolet fibre-cavity for strong ion-photon interaction
… $\pi$ rotations are performed with resonant light pulses derived from a frequency-doubled mode-locked titanium-sapphire laser. The experiment is controlled through a system of hardware and software which has been developed in a modular fashion and will allow for efficient control on the …
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Single bubble sonoluminescence
… large amplitude so as to emit picosecond light pulses in each cycle of the acoustic drive pressure. Remarkably, the phenomenon represents about twelve orders of magnitude of energy focusing. SBSL has been carefully and thoroughly studied in part of parameter space by previous authors. In …
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