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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...
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Fall 2015
Ultrafast carrier dynamics in silicon nanocrystals (Si NCs) is explored using time-integrated photoluminescence, time-resolved photoluminescence and pump-probe transient absorption spectroscopies. The role of surface oxygen in the optical emission dynamics of dodecyl functionalized Si NCs is...
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Fall 2021
Ultrafast terahertz (THz) spectroscopy is presently the most powerful tool available to materials scientists for directly probing ultrafast conductivity dynamics. Its low center frequency and phase-resolved measurement, which yields sub-picosecond temporal resolution, make it ideally suited for...
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Fall 2013
Terahertz spectroscopy is a powerful non-contact technique to study the optical and electric properties of materials at sub-picosecond time scales. In this study, ultrafast time-resolved terahertz spectroscopy was performed on both silicon-on-sapphire (SOS) and iron pyrite (FeS2) nano-crystalline...