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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 17 — Sep. 1, 2013
  • pp: 3275–3278

Enhanced photoabsorption efficiency of incomplete nanoshells

Murugesan Venkatapathi, Sudipta G. Dastidar, P. Bharath, Arindam Roy, and Anupam Ghosh  »View Author Affiliations

Optics Letters, Vol. 38, Issue 17, pp. 3275-3278 (2013)

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The rather low scattering or extinction efficiency of small nanoparticles, metallic and otherwise, is significantly enhanced when they are adsorbed on a larger core particle. But the photoabsorption by particles with varying surface area fractions on a larger core particle is found to be limited by saturation. It is found that the core-shell particle can have a lower absorption efficiency than a dielectric core with its surface partially nucleated with absorbing particles—an “incomplete nanoshell” particle. We have both numerically and experimentally studied the optical efficiencies of titania (TiO2) nucleated in various degrees on silica (SiO2) nanospheres. We show that optimal surface nucleation over cores of appropriate sizes and optical properties will have a direct impact on the applications exploiting the absorption and scattering properties of such composite particles.

© 2013 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(290.5850) Scattering : Scattering, particles
(330.1690) Vision, color, and visual optics : Color
(160.4236) Materials : Nanomaterials
(310.6188) Thin films : Spectral properties

ToC Category:

Original Manuscript: May 29, 2013
Revised Manuscript: July 8, 2013
Manuscript Accepted: July 24, 2013
Published: August 22, 2013

Virtual Issues
Vol. 8, Iss. 10 Virtual Journal for Biomedical Optics

Murugesan Venkatapathi, Sudipta G. Dastidar, P. Bharath, Arindam Roy, and Anupam Ghosh, "Enhanced photoabsorption efficiency of incomplete nanoshells," Opt. Lett. 38, 3275-3278 (2013)

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