BYU

Abstract by Clayton Moss

Personal Infomation


Presenter's Name

Clayton Moss

Degree Level

Doctorate

Co-Authors

Benjamin R. Heiner
Shayne A. Sorenson
Jeremy A. Johnson

Abstract Infomation


Department

Chemistry and Biochemistry

Faculty Advisor

Jeremy Johnson

Title

Terahertz-Driven Nonlinear Dynamics of GaAs: Metamaterials and 2D Spectroscopy

Abstract

The development of THz spectroscopic techniques has enabled optical measurements of carrier dynamics in semiconductor systems, which contain information about conduction band features. We present our work on nonlinear carrier dynamics in a GaAs system. Gold nanostructures deposited on the surface of our sample serve as resonant amplifiers of incident THz light. These metastructures create strong, localized fields that drive carrier multiplication processes. We present theoretical work that explains the phenomena in terms of both Zener tunneling and impact ionization. New results from a 2D THz-THz spectroscopic measurement provide additional insight into carrier dynamics. Our technique and initial findings present exciting avenues for the optical measurement and determination of electronic structure in a wide variety of systems.