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Optical investigations of nanostructured oxides and semiconductors

Irvin, Patrick Richard (2010) Optical investigations of nanostructured oxides and semiconductors. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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This work is motivated by the prospect of building a quantum computer: a device that would allow physicists to explore quantum mechanics more deeply, and allow everyone else to keep their credit card numbers safe on the internet. In this thesis we explore materials that are relevant to a proposed quantum computer architecture.Systems with a ferroelectric to paraelectric transition in the vicinity of room temperature areuseful for devices. Adjusting the ferroelectric transition temperature is traditionally accomplished by chemical substitution, as in barium strontium titanate. We investigate strained-strontium titanate, which is ferroelectric at room-temperature, and a composite material of barium strontium titanate and magnesium oxide.We present optical techniques to measure electron spin dynamics with GHz dynamical bandwidth,transform-limited spectral selectivity, and phase-sensitive detection. We demonstrate the technique with a measurement of GHz-spin precession in n-GaAs. We also describe our efforts to measure single quantum dots optically.Nanoscale devices with photonic properties have been the subject of intense research over the past decade. Potential nanophotonic applications include communications, polarization-sensitive detectors, and solar power generation. Here we show photosensitivity of a nanoscale detectorwritten at the interface between two oxides.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Irvin, Patrick Richardprist2@pitt.eduPRIST2
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairLevy, Jeremyjlevy@pitt.eduJLEVY
Committee MemberSingh, Chandralekhaclsingh@pitt.eduCLSINGH
Committee MemberHillier, D. Johnhillier@pitt.eduHILLIER
Committee MemberPetek, Hrvojepetek@pitt.eduPETEK
Committee MemberChen, Kevinpec9@pitt.eduPEC9
Date: 28 January 2010
Date Type: Completion
Defense Date: 16 November 2009
Approval Date: 28 January 2010
Submission Date: 23 September 2009
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Physics
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Faraday rotation; ferroelectrics; quantum dots; quantum computation; oxide 2DEG; photoluminescence
Other ID:, etd-09232009-152720
Date Deposited: 10 Nov 2011 20:02
Last Modified: 15 Nov 2016 13:50


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