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Study of Plasmonic Phenomena in Metal Nanostructure Arrays

Jung, Yun-suk (2011) Study of Plasmonic Phenomena in Metal Nanostructure Arrays. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Metal nanostructures have received considerable attention for their ability to guide and manipulate light at the nanometer scale. As in the case of electronics, scaling down the dimensions of photonic devices is expected to bring numerous benefits in terms of speed, capacity, and energy efficiency in information processing. Surface plasmons, collective oscillation of electrons excited by light, are basically photon waves trapped/squeezed at a metal/dielectric interface. The reduced size in electromagnetic field distribution offers a potential for nanoscale reduction of photonic devices. The intrinsic coupling between electrons and photons also offers a potential for merging electronics and photonics on the same platform.In this thesis, we have investigated metallic nanostructures as a medium for plasmonic interactions. Surface plasmons excited on a metallic structure can produce many interesting phenomena that can be observed in the near-field to far-field regime. We have studied the anomalous behavior of surface plasmons that are excited in a resonant cavity structure of a metal nanoslit array. We show that modification of a metal nanoslit array by a self-assembled monolayer of molecules can give rise to a blue-shift in the peak transmission wavelength. A simple model was developed to predict the wavelength shift and its sign. We have characterized the near- to far-field distribution of optical wavefronts emanating from a nanoslit formed in a thin silver film. The evolution of optical phases was imaged using a self-interference technique in conjunction with a scanning probe method. The phase relationship of the slit-transmitted waves with respect to the direct transmission through the thin metal film is quantitatively established. We have investigated negative refraction of visible light that does not involve any negative-index media. The interfacial negative refraction without bulk media, demonstrated in this thesis, offers a promising approach to accessing angular ranges that have not been reachable in conventional optics.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairKim, Hong Koohkk@pitt.eduHKK
Committee MemberFalk, Joelfalk@ee.pitt.eduFALK
Committee MemberYun, Minheemiy16@pitt.eduMIY16
Committee MemberCoalson, Robcoalson@pitt.eduCOALSON
Committee MemberStanchina, Williamwes25@pitt.eduWES25
Date: 3 August 2011
Date Type: Completion
Defense Date: 22 July 2009
Approval Date: 3 August 2011
Submission Date: 15 July 2009
Access Restriction: 5 year -- Restrict access to University of Pittsburgh for a period of 5 years.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Anomalous dispersion; Diffractive optics; Metal nanostructures; Metal optics; Negative refraction; Surface plasmons
Other ID:, etd-07152009-134522
Date Deposited: 10 Nov 2011 19:51
Last Modified: 15 Nov 2016 13:45


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