We analyze the localized surface plasmon resonance spectra of periodic square lattice arrays of gold nano-disks, and we describe numerically and experimentally the effect of disorder on resonance width, spectrum, and EM field enhancement in increasingly randomized patterns. The periodic structure shows a narrower and stronger extinction peak, conversely we observe an increase of up to (1-2) x 10(2) times enhancement as the disorder is gradually introduced. This allows for simpler, lower resolution fabrication, cost-effective in light harvesting for solar cell and sensing applications. We show that dipole-dipole interactions contribute to diffract light parallel to the surface as a mean of long-range coupling between the nano-disks. (C) 2012 Optical Society of America

Surface plasmon resonances in periodic and random patterns of gold nano-disks for broadband light harvesting / Nishijima, Yoshiaki; Rosa, Lorenzo; Juodkazis, Saulius. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 20:10(2012), pp. 11466-11477. [10.1364/OE.20.011466]

Surface plasmon resonances in periodic and random patterns of gold nano-disks for broadband light harvesting

ROSA, Lorenzo;
2012

Abstract

We analyze the localized surface plasmon resonance spectra of periodic square lattice arrays of gold nano-disks, and we describe numerically and experimentally the effect of disorder on resonance width, spectrum, and EM field enhancement in increasingly randomized patterns. The periodic structure shows a narrower and stronger extinction peak, conversely we observe an increase of up to (1-2) x 10(2) times enhancement as the disorder is gradually introduced. This allows for simpler, lower resolution fabrication, cost-effective in light harvesting for solar cell and sensing applications. We show that dipole-dipole interactions contribute to diffract light parallel to the surface as a mean of long-range coupling between the nano-disks. (C) 2012 Optical Society of America
2012
20
10
11466
11477
Surface plasmon resonances in periodic and random patterns of gold nano-disks for broadband light harvesting / Nishijima, Yoshiaki; Rosa, Lorenzo; Juodkazis, Saulius. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 20:10(2012), pp. 11466-11477. [10.1364/OE.20.011466]
Nishijima, Yoshiaki; Rosa, Lorenzo; Juodkazis, Saulius
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1138513
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