Dissertation > Excellent graduate degree dissertation topics show

Studies on Localized Electromagnetic Enhancement of Metallic Nanoparticle by Numerical Simulation

Author: DuanJianMin
Tutor: ChenMaoZuo
School: Dalian University of Technology
Course: Optics
Keywords: Surface Enhancement Raman Scattering Surface Plasmon Resonance Finite Difference Time Domain Nanoparticle Array
CLC: O437.3
Type: Master's thesis
Year: 2009
Downloads: 182
Quote: 2
Read: Download Dissertation

Abstract


Surface enhancement Raman scattering has been proved to be the powerful tool for the detection of molecular structure adsorbed on the surface of metallic layer.As the substrate of the surface enhancement Raman scattering,the metallic nanoparticle plays an important role. If the metallic nanoparticles are prepared with suitable shape,size and arrangement,the signal of Raman scattering can be highly improved,further,the information of molecular structure could be detected more clearly.The surface plasmon resonance could be induced on the surface of the metallic nanoparticle illuminated by the exterior electromagnetic field,and the localized electromagnetic enhancement are also presented in the vicinity of the surface.This mechanism explains the enhancement of the signal of surface enhancement raman scattering. Besides,the highly localized electromagnetic enhancement of the metallic nanoparticle has a vast potential to become an important element in the biosensor,nano-scale integrated optical device,near-field optics and nanophotonics.In this work,the local field electromagnetic enhancement of two nanostructures is mainly studied:(1) The localized electric field enhanced-property in vicinity of Au/Ag immersed in air and water is studied,respectively.The results show that,Comparing Resonance peaks to silver,the case of gold presents to long wavelength;To extent the tip length and to change the environment permittivity from air to water,both of silver and gold exhibit the peaks with red-shift;the silver tip has better enhanced property than the gold under 600 nm wavelength, while the opposite case is larger than 700nm.These results are good for the context of tip enhanced-spectroscopy analysis.(2) Local field electromagnetic enhancement of several silver nanosphere pairs interacting with incident plane wave are simulated by three-dimensional finite-difference time-domain(FDTD) method in visible-nearinfrared light region.The array of nanosphere pairs enables the investigation of particle-particle interaction as well as pair-pair interaction. Influences of incident wavelength,radius of nanospheres and number of pairs on local field enhancement are discussed.Electromagnetic enhancement are generated in the vicinity of nanospheres,and the highest enhancement are always in the gap of penultimate pair.With the increasing wavelength,the resonant peaks shift to larger radius,and the intensities increase remarkably.

Related Dissertations

  1. Design of High-efficiency Thermophotovoltaic System,TM914.4
  2. Purification of an Estrogen Receptor from Carp and the Interaction with Phthalic Acid Esters (PAEs),S917.4
  3. Research on Optical Properties of Waveguide Based on Surface Plasmon Polaritons,TN252
  4. The Research on Characteristics of Reconfigurable Optical Add/Drop Multiplexer Based on Photonic Crystals,TN929.1
  5. Study on Metal-Dielectric Subwavelength Waveguide Structure,TN814
  6. Containing silver nanoparticles temperature stimuli-responsive hybrid nano- hydrogels,TB383.1
  7. Containing silver nanoparticles pH stimuli-responsive nanocomposite hydrogels,TB383.1
  8. Study on Comprehensive Geological Forecast on Long and Large Tunnel under Complicated Geological Conditions,U452.11
  9. SECM-SPR quantitative release of hydrogen peroxide and its interaction with the metal protein in situ,R363
  10. Time Domain Analysis of Basic Eletromagnetic Characteristics for Left-handed Materials,O441.4
  11. Study on a New Two-dimensional Photonic Crystal Ring Resonator and Its Application,O734
  12. Research on Cavity Shielding Effectiveness Using Hybrid FDTD Method,TN011
  13. Research on Absorbing Boundary Condition and Its Application on Electromagnetic Scattering,O441.4
  14. The Competitive Inhibition Assay and Experimental Study on Antibiotics and Melamine Residues in Milk,TS252.7
  15. FDTD Analysis on Influence of Micro-Nano Surface on Near-Field Light Intensity Distribution in KDP Crystal,TG665
  16. Detect the Early Breast Tumor Via Beamforming Algorithm,R737.9
  17. The Research on Glucose Measuring Technique by Surface Plamon Resonance Based on D-galactose/D-glucose Binding Protein,R446.1
  18. Surface Plasmon Resonance Effect Based on Supercontinuum Source,TN241
  19. Improved Methods and Experiments for the Detection of Antibiotics Residues Based on Surface Plasmon Resonance Sensor,TS207.53
  20. Preparation and Study on Optical Property of Gold-Silver Alloy Nanoparticles and Metal Nanoparticles Thin Film,TB383.1
  21. Numerical Research on Thermal Radiative Properties of One-Dimensional Periodic Microstructured Surface,O734

CLC: > Mathematical sciences and chemical > Physics > Optics > Nonlinear optical ( light and matter) > Stimulated Raman Scattering
© 2012 www.DissertationTopic.Net  Mobile