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Title page for ETD etd-09012006-153819

Type of Document Dissertation
Author McMahon, Matthew David
URN etd-09012006-153819
Title Effects of Geometrical Order on the Linear and Nonlinear Optical Properties of Metal Nanoparticles
Degree PhD
Department Physics
Advisory Committee
Advisor Name Title
Richard F. Haglund, Jr. Committee Chair
Charles A. Brau Committee Member
David E. Cliffel Committee Member
Robert A. Weller Committee Member
Sokrates T. Pantelides Committee Member
  • nonlinear optics
  • metal nanoparticles
  • second-harmonic generation
  • focused-ion-beam lithography
  • localized surface plasmon resonance
Date of Defense 2006-08-07
Availability unrestricted
This dissertation describes experimental and computational studies of the effects of ordered arrangement on the linear and nonlinear optical properties of metal nanoparticles. The principal result is that second-harmonic light may be generated and observed from nanoparticle gratings having maximum in-plane symmetry, provided that one looks at non-normal observation angles. These measurements are made possible by a custom-built variable-angle microscope, and enable a variety of studies of the second-order nonlinear response of nanoparticles that were not previously feasible. In addition, the surface plasmon resonance of metal nanoparticles is studied by linear spectroscopy. A comparison of experimental data with computational modeling shows that under normal ambient conditions, Ag nanoparticles tarnish by a sulfidation reaction more readily than bulk silver, and that even a very thin surface layer of corroded material (Ag2S) considerably redshifts and weakens the localized surface plasmon resonance of a nanoparticle.
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