Truong, Vo-Van and Dormale, Bernard (2011) Optical Absorption in Overcoats of Nanoparticle Arrays on a Metallic Substrate. Plasmonics, 6 (2). pp. 195-200. ISSN 1557-1955
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Official URL: http://dx.doi.org/10.1007/s11468-010-9187-y
Abstract
Surface plasma oscillations in metallic particles as well as in thin metallic films have been studied extensively in the past decades. New features regarding surface plasma excitations are, however, constantly discovered, leading, for example, to surface-enhanced Raman scattering studies and enhanced optical transmission though metal films with nanohole arrays. In the present work, the role of a metallic substrate is examined in two cases, one involving an overcoat of dielectric nanoparticles and the other an overcoat of metallic nanoparticles. Theoretical results are obtained by modeling the nanoparticles as forming a two-dimensional, hexagonal lattice of spheres. The scattered electromagnetic field is then calculated using a variant of the Green function method. Comparison with experimental results is made for nanoparticles of tungsten oxide and tin oxide deposited on either gold or silver substrates, giving qualitative agreement on the extra absorption observed when the dielectric nanoparticles are added to the metallic surfaces. Such absorption would be attributed to the mirror image effects between the particles and the substrate. On the other hand, calculations of the optical properties of silver or gold nanoparticle arrays on a gold or a silver substrate demonstrate very interesting features in the spectral region from 400 to 1,000 nm. Interactions between the nanoparticle arrays surface plasmons and their images in the metallic substrate would be responsible for the red shift observed in the absorption resonance. Moreover, effects of particle size and ambient index of refraction are studied, showing a great potential for applications in biosensing with structures consisting of metallic nanoparticle arrays on metallic substrates.
| Divisions: | Concordia University > Faculty of Arts and Science > Physics |
|---|---|
| Item Type: | Article |
| Refereed: | Yes |
| Authors: | Truong, Vo-Van and Dormale, Bernard |
| Journal or Publication: | Plasmonics |
| Date: | 08 December 2011 |
| Keywords: | Nanoparticles – Plasmonics – Optical properties – Biosensing |
| ID Code: | 7653 |
| Deposited By: | DANIELLE DENNIE |
| Deposited On: | 15 Jun 2011 10:04 |
| Last Modified: | 15 Jun 2011 10:04 |
| References: | 1. Yamaguchi T, Yoshida S, Kinbara A (1974) Thin Solid Films 21:173
2. Norrman S, Anderson T, Granqvist CG, Hunderi O (1978) Phys Rev B 18:674 3. Truong VV, Scott GD, Opt J (1977) Soc Am 67:502–510 4. Nonaka S, Suda T, Oda H (2002) Jpn J Appl Phys 41:4538 5. Granqvist CG, Hunderi O (1978) Appl Phys Lett 32:798 6. Enoch S, Quidant R, Badenes G (2004) Opt Express 12:3422 7. Driskell JD, Lipert RJ, Porter MD (2006) J Phys Chem B 110:17444 8. Genet C, Ebbesen TW (2007) Nature 445:39 9. de Dormale BM, Truong VV (2009) Diffraction of light by a two-dimensional lattice of spheres. Preprint, Université de Moncton 10. de Dormale BM (1996) Can J Phys 74:43 11. de Dormale BM (1996) Can J Phys 74:603 12. de Dormale BM (1996) Can J Phys 74:608 13. Bosi G (1994) J Opt Soc Am B 11:1073 14. Stefanou N, Modinos A (1991) J Phys Condens Matter 3:8135 15. Bedeaux D, Vlieger J (2002) Optical properties of surfaces. Imperial College Press, London 16. Ziman JM (1972) Principles of the theory of solids, 2nd edn. Cambridge University Press, Cambridge 17. Jackson JD (1975) Classical electrodynamics, 2nd edn. Wiley, New York 18. Born M, Wolf E (1980) Principles of optics, 6th edn. Pergamon, Oxford 19. Truong VV, Yamaguchi T (1990) Bull Res Inst Electron Jpn 25:1 20. Truong VV, Ashrit PV, Bader G, Courteau P, Girouard FE, Yamaguchi T (1991) Can J Phys 69:107 21. Ashrit PV, Bader G, Girouard FE, Richard T, Truong VV (1991) J Appl Phys 70:3797 22. McIntyre JDE, Aspnes DE (1971) Surf Sci 24:417 23. Borensztein Y (2005) Phys Status Solidi 202:1313 24. Bader G (2008) Au, Ag and WO3 optical constants. Université de Moncton (private communication) 25. Davazoglou D (1997) Thin Solid Films 302:204 26. Seirafianpour N, Badilescu S, Djaoued Y, Bruning R, Balaji S, Kahrizi M, Truong VV (2008) E-MRS 2008 Paper 27. Agranovich VM, Darmanyan SA, Mal’chukov AG (1980) Opt Comm 33:234 28. Steinmann W (1968) Phys Status Solidi 28:437 |
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