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EFFECTIVE NONLINEAR SUSCEPTIBILITIES OF METAL-INSULATOR AND METAL-INSULATOR-METAL NANOLAYERED STRUCTURES Dissertation Submitted to The School of Engineering of the UNIVERSITY OF DAYTON In Partial Fulfillment of the Requirements for The Degree of Doctor of Philosophy in Electro-Optics By Mallik Mohd Raihan Hussain Dayton, Ohio May, 4242 EFFECTIVE NONLINEAR SUSCEPTIBILITIES OF METAL-INSULATOR AND METAL-INSULATOR-METAL NANOLAYERED STRUCTURES Name: Hussain, Mallik Mohd Raihan APPROVED BY: Imad Agha, Ph.D. Andrew Sarangan, Ph.D. Advisory Committee Chairman Committee Member Associate Professor, Department of Professor, Department of Physics, and, Department of Electro- Electro-Optics and Photonics Optics and Photonics Partha Banerjee, Ph.D. Michael Scalora, Ph.D. Committee Member Committee Member Professor and Department Chair, Research Physicist, Charles M. Department of Electro-Optics and Bowden Research Facility, Photonics AMRDEC, US Army RDECOM Robert J. Wilkens, Ph.D., P.E. Eddy M. Rojas, Ph.D., M.A., P.E. Associate Dean for Research Dean, School of Engineering and Innovation Professor, School of Engineering ii © Copyright by Mallik Mohd Raihan Hussain All rights reserved 4242 ABSTRACT EFFECTIVE NONLINEAR SUSCEPTIBILITIES OF METAL-INSULATOR AND METAL-INSULATOR-METAL NANOLAYERED STRUCTURES Name: Hussain, Mallik Mohd Raihan University of Dayton Advisor: Dr. Imad Agha Nonlinear electromagnetic radiation (second and third harmonic) from the metal-insulator and metal-insulator-metal structures were measured and compared against predictions from the hydrodynamic models of plasmonics. This model incorporated higher order terms stem- ming from electron tunneling and nonlocality. This study shows that, besides the linear optical parameter like permittivity, conductivity etc, changes in the nonlinear optical pa- rameters, namely, second and third order susceptibilities (χ(2) and χ(3), respectively) can also be used to probe and compare the higher-order terms of the hydrodynamic model of plasmonics.
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