Index Catalog // ScholarsArchive@OSU

Time resolved terahertz spectroscopy of photocarrier dynamics in WSe2

Creator:: Johnson, Nathan
Abstract:: Semiconductors serve an integral role in our technologies today. However, with new advancements in ultra-fast electronics, we are approaching the fundamental speed limits of traditional silicon-based semiconductors. Silicon-based semiconductors typically exhibit photocarrier dynamics in nanosecond timescales. Transition metal dichalcogenides (TMDs) are 2D materials shown to exhibit photocarrier dynamics in picosecond...
Resource Type:: Undergraduate Thesis

Application of Coupled Oscillator Model to Terahertz and Optical Control of Plasmon Induced Opacity in Coupled Metamaterials

Creator:: Sprague, Milo X.
Abstract:: Terahertz (THz) frequencies of the electromagnetic spectrum have been underutilized when compared to neighboring microwave and infrared frequencies, largely due to the difficulties controlling and detecting these fields. In a step toward gaining control over THz frequencies, my advisor Dr. Yun-Shik Lee’s group experimentally demonstrated optical-pulse THz-control over a plasmonic...
Resource Type:: Undergraduate Thesis

Analysis of semiconductor microcavity exciton-polaritons with coupled harmonic oscillators

Creator:: Sakuragi, Mai
Abstract:: Terahertz (THz) time-domain spectroscopy provides insight into electron dynamics in semiconductor heterostructures. High-field THz spectroscopy probes the excitonic nonlinear response of GaAs quantum well (QW) systems and enables the measurement of its coherent dynamics in the time-domain. Consequently, THz spectroscopy allows one to explore the fundamental properties of many-body interactions...
Resource Type:: Undergraduate Thesis

Terahertz field enhancement in nanoantennas on gallium arsenide

Creator:: Brequigny, Victor
Abstract:: Terahertz (THz) spectroscopy is a great tool not only to study fundamental physical processes such as many-body Coulomb interaction but also to develop ultrafast electronic devices. More specifically, intense THz fields interacting with semiconductors have exhibited strong nonlinear effect involving extreme carrier dynamics. In this experiment, intense THz radiation was...
Resource Type:: Undergraduate Thesis

Plasmon Induced Transparency in Terahertz Metamaterials

Creator:: Meyers, Joseph
Abstract:: Plasmon induced transparency (PIT) describes a spectral response of coupled plasmonic resonators in that coupling between bright and dark modes leads to a destructive interference resulting in a narrow transparency window. This process has many applications in material characterization and advanced optical devices such as slow light devices or ultrafast...
Resource Type:: Undergraduate Thesis

High-Field Terahertz Spectroscopy of Nanoscale Materials

Creator:: Mousavian, Ali
Abstract:: This dissertation covers my work relating to the application of strong terahertz (THz) radiation to study the nonlinear properties of nano-scale material. It presents experimental and numerical studies on the optical and electronic properties of various material system including single-layer graphene, multi-walled carbon nanotubes (MWCNTs), nanoantenna-patterned gallium arsenide (GaAs) and...
Resource Type:: Dissertation

Complex Index of Refraction of Multi-walled Carbon Nanotubes in Strong Terahertz Fields

Creator:: McCuen, Dalton R.
Abstract:: Carbon nanotubes are the subject of intense interest in virtually every field, from medicine to nano-scale electrical components. Multi-walled nanotubes exhibit a strong nonlinear response to high-field strength terahertz radiation. This research uses terahertz pulses with field strength exceeding 1 MV/cm generated by means of optical rectification utilizing a lithium...
Resource Type:: Undergraduate Thesis

Terahertz Induced Non-linear Electron Dynamics in Nanoantenna Coated Semiconductors at the Sub-picosecond Timescale

Creator:: Stickel, Andrew
Abstract:: This dissertation is an exploration of the material response to Terahertz (THz) radiation. Specifically we will explore the ultrafast electron dynamics in the nonperturbative regime in semiconductors that have been patterned with nanoantenna arrays using broadband, high intensity, THz radiation. Three main semiconductor materials will be studied in this work....
Resource Type:: Dissertation

Nonlinear Terahertz Spectroscopy and imaging of Carbon Nanomaterials

Creator:: Lee, Byounghwak
Abstract:: This dissertation presents nonlinear terahertz (THz) properties of carbon nanomaterials investigated by time-resolved high-field THz spectroscopy. In order to determine THz characteristics of nanomaterials, we performed THz power spectrum measurement, THz raster imaging, THz time-domain spectroscopy (THz-TDS) and time-resolved pump-probe experiment on two different types of single layer graphene and...
Resource Type:: Dissertation

High Field Terahertz Spectroscopy of Optically Excited Gallium Arsenide

Creator:: Compeau, James
Abstract:: High field time-domain terahertz spectroscopy (TDS) is used to determine the time dependent transmission and the time-delay and optical-power dependent conductivity of a wafer of gallium arsenide (GaAs). Gallium arsenide is a direct band-gap semiconductor and has potential as a computer processor component. Analysis of the transmission of terahertz (THz)...
Resource Type:: Undergraduate Thesis

ScholarsArchive@OSU

Time resolved terahertz spectroscopy of photocarrier dynamics in WSe2

Application of Coupled Oscillator Model to Terahertz and Optical Control of Plasmon Induced Opacity in Coupled Metamaterials

Analysis of semiconductor microcavity exciton-polaritons with coupled harmonic oscillators

Terahertz field enhancement in nanoantennas on gallium arsenide

Plasmon Induced Transparency in Terahertz Metamaterials

High-Field Terahertz Spectroscopy of Nanoscale Materials

Complex Index of Refraction of Multi-walled Carbon Nanotubes in Strong Terahertz Fields

Terahertz Induced Non-linear Electron Dynamics in Nanoantenna Coated Semiconductors at the Sub-picosecond Timescale

Nonlinear Terahertz Spectroscopy and imaging of Carbon Nanomaterials

High Field Terahertz Spectroscopy of Optically Excited Gallium Arsenide

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