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FDTD Algorithm for Plasmonic Nanoparticles with Spatial Dispersion

Zhang, Li
http://orcid.org/0000-0002-0667-4247
http://rave.ohiolink.edu/etdc/view?acc_num=osu1452174003

Abstract Details

2016, Master of Science, Ohio State University, Electrical and Computer Engineering.
We develop a finite-difference time-domain (FDTD) algorithm incorporating the hydrodynamic Drude model for the permittivity of noble metals. This model incorporates spatial dispersion (nonlocal) effects on the permittivity. The resulting FDTD algorithm fully includes eddy current effects and is employed to study the extinction cross section of different metallic nanoparticles: nanospheres, nanoshells, nanospheroids, nanodisks, and nanorings, in the visible spectrum. It is observed that spatial dispersion can have significant effects on the extinction cross section of nanoparticles with characteristic sizes around 20 nm or below. For larger particles, the effect is mostly negligible. It is determined that inclusion of spatial dispersion yields two general trends on the behavior of the extinction cross section versus frequency as the particle size is reduced. The first is a blue-shift on the extinction spectrum and the second is an overall decrease on the extinction cross section as well as on the sharpness of resonance peaks. Also we find the strength of spatial dispersion effects do not have significant dependence on the orientation of nanoparticles.
Teixeira Fernando (Advisor)
Anderson Betty (Committee Member)
63 p.
Electrical Engineering; Electromagnetics; Electromagnetism; Physics
FDTD; nanoparticles; Drude model; hydrodynamic Drude model; plasmonic

Recommended Citations

Citations

  • Zhang, L. (2016). FDTD Algorithm for Plasmonic Nanoparticles with Spatial Dispersion [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452174003

    APA Style (7th edition)

  • Zhang, Li. FDTD Algorithm for Plasmonic Nanoparticles with Spatial Dispersion. 2016. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1452174003.

    MLA Style (8th edition)

  • Zhang, Li. "FDTD Algorithm for Plasmonic Nanoparticles with Spatial Dispersion." Master's thesis, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452174003

    Chicago Manual of Style (17th edition)

osu1452174003
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This open access ETD is published by The Ohio State University and OhioLINK.