Extinction spectra of silver nanoparticle arrays

Shengli Zou; Linlin Zhao; George C. Schatz

doi:10.1117/12.503436

28 October 2003 Extinction spectra of silver nanoparticle arrays

Shengli Zou, Linlin Zhao, George C. Schatz

Proceedings Volume 5221, Plasmonics: Metallic Nanostructures and Their Optical Properties; (2003) https://doi.org/10.1117/12.503436
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

The optical properties of silver nanoparticle arrays are studied by T-matrix and discrete dipole approximation (DDA) methods. Arrays of spherical silver particles with a radius of 30 nm are investigated with particular emphasis on the influence of array disorder on optical response. We find that the dipole peak intensities decrease when the array becomes disordered and the plasmon resonance wavelengths generally exhibit smaller blue shifts compared to perfectly ordered arrays. Using an extended DDA method, we calculate the extinction spectra of ordered nanodisk arrays, examining the variation of plasmon resonance wavelength with interparticle spacing (at fixed particle size). The calculated blue shift of the plasmon wavelength with decreasing interparticle spacing is found to be in excellent agreement with recent experiments.

Citation Download Citation

Shengli Zou, Linlin Zhao, and George C. Schatz "Extinction spectra of silver nanoparticle arrays", Proc. SPIE 5221, Plasmonics: Metallic Nanostructures and Their Optical Properties, (28 October 2003); https://doi.org/10.1117/12.503436

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