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Fall 2014
Femtosecond (fs, 1fs=10^(-15)s) laser pulses are used in a variety of fields from nano-machining to the quest for fusion energy. However, knowledge of quantitative details for femtosecond laser material interaction processes is still insufficient, and many unique applications remain unexplored....
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Fall 2016
Over the last 5 years, tilted pulse-front terahertz (THz) generation has opened the door to new studies of nonlinear dynamics in a variety of materials. With access to strong electric fields that turn on and off over picosecond timescales exciting new possibilities exist to control light-matter...
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Spring 2024
THz optics and scanning probe microscopy (SPM) techniques have gone through several decades of development, enabling numerous research studies and applications related to ultrafast phenomena at the nanoscale. Advancements in THz technology enable physical processes in materials to be identified...
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Fall 2021
The advent of the terahertz scanning tunneling microscope (THz-STM) brings with it a new method of observing and characterizing the ultrafast dynamics of materials. The sub-nanometer spatial resolution of an ultra-high vacuum scanning tunneling microscope (UHV-STM) coupled with the sub-picosecond...
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Spring 2024
We investigate the microscopic nature of charge-carrier conduction in nanoscale semiconducting materials using time-resolved terahertz spectroscopy (TRTS). TRTS uses picosecond pulses of terahertz radiation (0.5-2.5 THz) to explore photoexcited charge-carrier lifetimes and dynamics with...
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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...