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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 36 — Dec. 20, 2010
  • pp: 6872–6877

Near-field optical properties of silver nanocylinders arranged in a Pascal triangle

G. V. Pavan Kumar  »View Author Affiliations


Applied Optics, Vol. 49, Issue 36, pp. 6872-6877 (2010)
http://dx.doi.org/10.1364/AO.49.006872


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Abstract

The Pascal triangle is a geometric representation of binomial coefficients in triangular form. We utilize this formalism to deterministically arrange silver nanocylinders of different sizes (30, 60, and 90 nm ) on a triangle and numerically study their near-field optical properties. We show that near-field intensities at specific points on this triangle depend on the wavelength and angle of incidence. From the wavelength-dependent studies at various junctions of nanocylinders, we obtain maximum near-field intensity at 350 and 380 nm . By varying the angle of incidence of the TM-polarized plane wave, we find systematic variation in the near-field intensity at different junctions of the geometry. Our study will lead to insights in designing controllable electromagnetic hot spots for chip-based plasmonic devices.

© 2010 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: September 14, 2010
Revised Manuscript: November 9, 2010
Manuscript Accepted: November 10, 2010
Published: December 14, 2010

Citation
G. V. Pavan Kumar, "Near-field optical properties of silver nanocylinders arranged in a Pascal triangle," Appl. Opt. 49, 6872-6877 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-36-6872

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