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 11 of 11 for “"Ultrafast optics"”.
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Low-Energy Electron-Photon Interactions in a Scanning Electron Microscope
… This work takes advantage of developments in ultrafast optics, electron spectroscopy, quantum optics, and nanofabrication to explore various electron-electron, electron-photon, and electron-material interactions. In this thesis, we construct a low-energy, ultrafast scanning electron …
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Ultrafast spectroscopy and control of correlated quantum materials
… on correlated condensed matter systems using ultrafast optics. I begin with a broad overview of this field, focusing specifically on the essential physics involved in ultrafast processes and how that physics may be utilized, in the sense of either spectroscopy or control, to understand …
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Studies of third-order nonlinearities in materials and devices for ultrafast lasers
… and medical imaging have motivated research in ultrafast optics. Demand exists for broadband components and sources as well as highly nonlinear fibers and materials. For this thesis, several different devices have been developed for such applications. Broadband saturable absorbers based on III/V …
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Optical-parametric-amplification applications to complex images
We have used ultrafast optics, primarily focused on the nonlinear processes of Polarization Gating and of Optical Parametric Amplification, one for measurement and the other for imaging purposes. For measurement, we have demonstrated a robust method of measurement to simultaneously measure both …
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COMPLETE TEMPORAL MEASUREMENT OF LOW-INTENSITY AND HIGH-FREQUENCY ULTRASHORT LASER PULSES
Two important frontiers in the field of ultrashort pulse measurement are the complete temporal measurement of low-intensity picosecond pulses in the near-infrared (NIR) and intense ultrashort pulses in the ultraviolet (UV) and extreme ultraviolet (EUV). The former are projected to find great use in …
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Characterization and application of simultaneously spatio-temporally focused ultrafast laser pulses
Chirped pulse amplication of ultrafast laser pulses has become an essential technology in the elds of micromachining, tissue ablation, and microscopy. With specically tailored pulses of light we have been able to begin investigation into lab-on-a-chip technology, which has the potential of …
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Real-time characterization of transient dynamics in thulium-doped mode-locked fiber laser
Thulium (Tm) based high repetition rate compact optical frequency comb sources operating in the 2 µm regime with femtosecond pulse durations enable a wide range of applications such as precise micro-machining, spectroscopy and metrology. Applications such as metrology and spectroscopy rely on the …
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Nonlinear THz emission spectroscopy of spin and charge dynamics in correlated materials
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Breaking the Cycle: the Rise and Fall of Conversion Cycle Limited Three-Wave Mixing
The cyclic exchange of energy between the pump, signal, and idler fields that characterizes optical parametric amplification (OPA) places a fundamental limitation on efficiency for Gaussian-shaped beam and pulse profiles typical of real laser sources. This is because the intensity dependent …
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Nonlinear optical properties of novel nanostructured ion implanted laser ablated silicon using femtosecond pulse excitation
… excitation measurements were performed to study ultrafast dynamics by inducing nonlinear optical changes, such as photo-induced absorption and measuring the nonlinear response. For fast optical switching applications, a fast and relatively large electronic nonlinearity is required.
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Optical control and probe of ferromagnetic and ferroic orders in films, heterostructures, and perovskite-based material systems
This dissertation is focused on ferromagnetic, multiferroics, and two-dimensional (2D) perovskites, exploring different unique collective magnetic and ferroic characters: (1) ferromagnetic thin film Co/Pd multilayers, (2) BaTiO3-BiFeO3 (BTO-BFO) a magneto-electric materials system, and (3) CuCl4 …