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Identifier uch.physics.phd//2007kavousanaki
Title Ultrafast Nonlinear Optical Response of the Quantum Hall System
Alternative Title Υπερταχής μη γραμμική οπτική απόκρίση του κβαντικού συστήματος Hall
Author Καβουσανάκη, Ελευθερία Γ
Thesis advisor Περάκης, Ηλίας
Abstract In the present dissertation we discuss a theory of the ultrafast nonlinear optical response of the quantum Hall system. Our theory focusses on the role of the low energy collective electronic excitations of the cold, strongly correlated, two–dimensional electron gas (2DEG) present in the ground state. It takes into account ground state electron correlations and Pauli exchange and interaction effects between the photoexcited excitons and the collective electron gas excitations. Our formulation addresses both the initial coherent regime, where the dynamics is determined by exciton and 2DEG polarizations and quantum mechanical coherences, and the subsequent incoherent regime, dominated by population dynamics. We discuss the manifestations of intraband and interband coherences induced by the collective 2DEG excitations in the coupled photocarrier–quantum Hall system and compare to transient three–pulse four–wave–mixing experiments. In addition, we apply our theory to the case of an undoped quantum well in a magnetic field and describe the creation of intraband and interband coherences therein, created by the photoexcited carriers.
Language English
Issue date 2007-09-10
Collection   School/Department--School of Sciences and Engineering--Department of Physics--Doctoral theses
  Type of Work--Doctoral theses
Permanent Link https://elocus.lib.uoc.gr//dlib/a/b/7/metadata-dlib-user1214378628-32200.tkl Bookmark and Share
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