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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 21038–21049

Absorption Enhancement in Solution Processed Metal-Semiconductor Nanocomposites

F. Pelayo García de Arquer, Fiona J. Beck, and Gerasimos Konstantatos  »View Author Affiliations

Optics Express, Vol. 19, Issue 21, pp. 21038-21049 (2011)

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We present a full wave 3D simulation study of optical absorption enhancement in solution processed metal-semiconductor nanocomposite ultrathin films, which consist of colloidal metallic nanoparticles (MNPs) and semiconductor matrices of polymer and colloidal quantum dots (CQD). We present an approach for modeling the optical properties of a CQD film, and study the effect of the optical properties of the semiconductor in the near field enhancement showing that CQD is a very promising platform to exploit the benefits of the near-field effects. We show that over a 100% enhancement can be achieved in the visible-near infrared region of the spectrum for CQD PbS films, with a maximum gain factor of 4 when MNPs are on resonance. We study in detail the effect of MNP capping for different ligand lengths and materials and propose solutions to optimize absorption enhancement.

© 2011 OSA

OCIS Codes
(040.5160) Detectors : Photodetectors
(310.6860) Thin films : Thin films, optical properties
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: July 18, 2011
Manuscript Accepted: September 13, 2011
Published: October 7, 2011

F. Pelayo García de Arquer, Fiona J. Beck, and Gerasimos Konstantatos, "Absorption Enhancement in Solution Processed Metal-Semiconductor Nanocomposites," Opt. Express 19, 21038-21049 (2011)

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