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Fall 2016
Ultra wideband (UWB)- synthetic aperture radars are emerging devices that are ideal for sensing and imaging applications in many special conditions such as monitoring subsurfaces, through-wall imaging, non-destructive characterization of materials, oil reservoir monitoring, weather forecasting,...
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Fall 2018
This thesis presents theoretical and experimental work on the generation and control of ultrashort electron pulses via surface plasmon (SP) waves. As such, new methods are presented to specifically control various beam parameters such as direction, kinetic energy, pulse duration, and...
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Fall 2021
Motivated by relevant applications in spray cooling, coating, and inkjet printing, droplet impact dynamics on a solid surface is investigated both numerically and experimentally by varying several major control parameters such as impact velocity, contact angle, and surface temperature. First,...
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Fall 2018
High-frequency ultrasound (>20MHz) offers promising opportunities for high-resolution blood flow imaging of the microcirculation at superficial depths owing to high backscatter coefficient and high resolution. Because time-of-flight is minimal at these superficial depths, focused beam scanning...
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Fall 2017
Ultrafast terahertz (THz) microscopy is an emerging field of research that leverages the imaging of picosecond electric field transients to explore free carrier responses from a near-field perspective. This thesis presents the first effort made to use an electro-optic imaging system to probe the...
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Fall 2013
The main purpose of this thesis is to develop terahertz (THz) generation, detection, and spectroscopy techniques via ultrafast imaging methods. Sampling THz pulse waveforms with anoncollinear imaging technique was carried out. Full-field images of the THz electric field waveforms sampled in...
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Spring 2014
This thesis presents the realization and characterization of passive and active photonic and nanoplasmonic waveguides for applications in all-optical circuitry. The key results focus on generating visible light in nanoscale silicon waveguides through nonlinear interactions and demonstrating...
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Fall 2019
Narreto, Mary Alvean Balmadres
In this thesis, the ultrafast photoluminescence and photoconductivity dynamics of different types of semiconductors are investigated. Using time-resolved photoluminescence and time-resolved terahertz spectroscopy techniques, the origin of the light emission and the nature of carrier transport are...