Doctoral theses
Current Record: 2007 of 2490
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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
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Καβουσανάκη, Ελευθερία Γ
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Thesis advisor
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Περάκης, Ηλίας
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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.
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Language |
English |
Issue date |
2007-09-10 |
Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Doctoral theses
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Type of Work--Doctoral theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/a/b/7/metadata-dlib-user1214378628-32200.tkl
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Views |
675 |