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Analysis of Nonlinear and Plasmonic Nano-Photonic Structures

Naqavi, Ali | 2008

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39486 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Mehrany, Khashayar; Khorasani, Sina
  7. Abstract:
  8. Different methods of shifting and shaping of space-time electromagnetic pulses are in this work investigated by nonlinearity and/or dispersion. Developing two dimensional (2D) finite difference time domain (FDTD) codes in the nonlinear regime and taking the optical dispersion of ideal metals into account, nanophotonic and plasmonic structures are analyzed in this thesis.
    Goos-Hänchen shift, superprism effect, and optical bistability are particularly emphasized. A heuristic approximation is presented to extract the Goos-Hänchen shift at the interface of 1D and 2D photonic crystals. The superprism effect for electric polarization – where the electric field vector is perpendicular to the 2D structure- is studied in 2D metallic photonic crystals with Drude linear dispersion. It is shown that the performance of these metallic structures is as well as or sometimes better than their dielectric equivalents. Furthermore, the dynamics of the bistable behavior is studied through analyzing all-optical bistable nonlinear photonic crystals and potential applications in a typical communication system are discussed. Also, an optimum point for the operation of single-cavity bistable photonic switches is found. Despite transients, it is shown that the optimum point is appropriate for ultrafast all-optical switching
  9. Keywords:
  10. Superprism Effect ; Nonlinear Optics ; Finite Difference Time Domain (FDTD) ; Optical Bistability ; Linear Dispersion Code ; Goos-Hanchen Shift

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