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Analysis of third harmonic generation and four wave mixing in gold nanostructures by nonlinear finite difference time domain

Sasanpour, P ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1166/jnn.2010.2903
  3. Publisher: 2010
  4. Abstract:
  5. Third order nonlinear effects and its enhancement in gold nanostructures has been numerically studied. Analysis method is based on computationally solving nonlinear Maxwell's equations, considering dispersion behavior of permittivity described by Drude model and third order nonlinear susceptibility. Simulation is done by method of nonlinear finite difference time domain method, in which nonlinear equations of electric field are solved by Newton-Raphshon method. As the main outcomes of third order nonlinear susceptibility, four wave mixing and third harmonic generation terms are produced around gold nanostructures. Results of analysis on different geometries and structures show that third order nonlinearity products are more enhanced in places where electric field enhancement is occurred due to surface plasmons. Results indicates that enhancement of nonlinearities is strongly occurred in structures whose interface is dielectric. According to analysis results, nonlinear effects are highly concentrated in the vicinity of nanostructures. Hence this approach can be used in applications where localized ultraviolet light is required
  6. Keywords:
  7. Gold Nanoparticle ; Nonlinear FDTD ; Nonlinear Plasmonic ; Third Harmonic Generation ; Plasmonic ; Third harmonic generations ; Third-order nonlinear susceptibility ; Control nonlinearities ; Electric fields ; Finite difference time domain method ; Four wave mixing ; Gold ; Harmonic analysis ; Harmonic generation ; Maxwell equations ; Mixing ; Nanoparticles ; Nonlinear analysis ; Plasmons ; Ultraviolet radiation ; Nonlinear equations
  8. Source: Journal of Nanoscience and Nanotechnology ; Volume 10, Issue 11 , 2010 , Pages 7179-7182 ; 15334880 (ISSN)
  9. URL: http://www.ingentaconnect.com/content/asp/jnn/2010/00000010/00000011/art00041