Novel tools for ultrafast spectroscopy

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dc.contributor.advisor Li, Elaine
dc.creator Jarvis, Thomas William 2012-02-06T22:44:36Z 2012-02-06T22:44:36Z 2011-12 2012-02-06 December 2011
dc.description.abstract Exciton dynamics in semiconductor nanostructures are dominated by the effects of many-body physics. The application of coherent spectroscopic tools, such as two-dimensional Fourier transform spectroscopy (2dFTS), to the study of these systems can reveal signatures of these effects, and in combination with sophisticated theoretical modeling, can lead to more complete understanding of the behaviour of these systems. 2dFTS has previously been applied to the study of GaAs quantum well samples. In this thesis, we outline a precis of the technique before describing our own experiments using 2dFTS in a partially collinear geometry. This geometry has previously been used to study chemical systems, but we believe these experiments to be the first such performed on semiconductor samples. We extend this technique to a reflection mode 2dFTS experiment, which we believe to be the first such measurement. In order to extend the techniques of coherent spectroscopy to structured systems, we construct an experimental apparatus that permits us to control the beam geometry used to perform four-wave mixing reflection measurements. To isolate extremely weak signals from intense background fields, we extend a conventional lock-in detection scheme to one that treats the optical fields exciting the sample on an unequal footing. To the best of our knowledge, these measurements represent a novel spectroscopic tool that has not previously been described.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subject Spectroscopy
dc.subject Ultrafast spectroscopy
dc.subject Ultra-fast spectroscopy
dc.subject Exciton
dc.subject Exciton dynamics
dc.subject Exciton optics
dc.subject Excitons
dc.subject Four-wave mixing
dc.subject Four wave mixing
dc.subject GaAs
dc.subject Gallium Arsenide
dc.subject Quantum well
dc.subject Semiconductor
dc.subject Acousto-optic
dc.subject Acousto optic
dc.subject Acousto-optic modulation
dc.subject Agile frequency
dc.subject Direct digital synthesis
dc.subject Lock-in detection
dc.subject Lock in detection
dc.subject Two-dimensional
dc.subject Two dimensional
dc.subject Fourier transform
dc.subject Multi-dimensional
dc.subject Multi dimensional
dc.subject Coherent
dc.subject Dephasing
dc.subject Relaxation
dc.subject Many body
dc.subject Many-body
dc.subject Physics
dc.subject Correlation
dc.subject Plasmon
dc.subject Surface plasmon
dc.subject Polariton
dc.subject Surface
dc.subject Hybrid
dc.subject Coupling
dc.subject Mode
dc.subject Grating
dc.subject Nanostructure
dc.subject Nano-structure
dc.subject Nano structure
dc.subject Reflection
dc.subject Mode
dc.subject geometry
dc.subject Transmission
dc.subject Variable
dc.subject Angle
dc.subject tuning
dc.subject Tunable
dc.subject Tuned
dc.subject Angle-tuning
dc.subject Angle-tunable
dc.subject Beam
dc.subject controllable
dc.subject Control
dc.title Novel tools for ultrafast spectroscopy 2012-02-06T22:45:37Z
dc.identifier.slug 2152/ETD-UT-2011-12-4456
dc.contributor.committeeMember Fink, Manfred
dc.contributor.committeeMember Keto, John
dc.contributor.committeeMember Lim, Sang-Hyun
dc.contributor.committeeMember Shih, Chih-Kang
dc.contributor.committeeMember Sitz, Greg
dc.description.department Physics
dc.type.genre thesis
dc.type.material text Physics Physics University of Texas at Austin Doctoral Doctor of Philosophy

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