Dissertation/Thesis Abstract

Simulations of Open Ballistic Quantum Systems and Semiclassical Semiconductor Superlattices
by Essen, Jonathan, Ph.D., University of California, Santa Barbara, 2017, 97; 10618311
Abstract (Summary)

The tunable antenna-coupled intersubband terahertz (TACIT) sensor is a heterodyne mixer based on the coupling of intersubband absorption with the sheet resistivity of doped GaAs/AlGaAs quantum wells. A theoretical treatment of this device as an open quantum system operating at the ballistic limit leads to the development of perfectly matched layers for the position-space Liouville-von Neumann equation.

Meanwhile, the nonlinear dynamics of weakly-coupled, doped GaAs/AlGaAs superlattices in the sequential-tunneling regime are theoretically characterized by computing the Poincar\'e map of a self-consistent, semiclassical resonant tunneling model. Applied to shorter superlattices at higher bias voltages, period-doubling cascades to high-frequency chaos are observed, and their robustness to variations in the design parameters is explored.

Indexing (document details)
Advisor: Sherwin, Mark, Birnir, Björn
Commitee: Nayak, Chetan, Srednicki, Mark
School: University of California, Santa Barbara
Department: Physics
School Location: United States -- California
Source: DAI-B 79/02(E), Dissertation Abstracts International
Source Type: DISSERTATION
Subjects: Quantum physics, Physics, Nanotechnology
Keywords: Tunable antenna-coupled intersubband terahertz
Publication Number: 10618311
ISBN: 978-0-355-42919-0
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