Field Enhancement in a Grounded Dielectric Slab by Using a Single Superstrate Layer

Article English OPEN
Valagiannopoulos, Constantinos A. ; Tsitsas, Nikolaos L. (2012)
  • Publisher: Hindawi Publishing Corporation
  • Journal: Advances in OptoElectronics (issn: 1687-563X, eissn: 1687-5648)
  • Related identifiers: doi: 10.1155/2012/439147
  • Subject: Electronics | QC350-467 | TK7800-8360 | Optics. Light | Article Subject
    arxiv: Physics::Optics | Physics::Classical Physics

The addition of a dielectric layer on a slab configuration is frequently utilized in various electromagnetic devices in order to give them certain desired operational characteristics. In this work, we consider a grounded dielectric film-slab, which is externally excited by a normally-incident Gaussian beam. On top of the film-slab, we use an additional suitably selected single isotropic superstrate layer in order to increase the field concentration inside the slab and hence achieve optimal power transfer from the external source to the internal region. We define a quantity of interest, called “enhancement factor,” expressing the increase of the field concentration in the film-slab when the superstrate is present compared to the case that it is absent. It is shown that large enhancement factor values may be achieved by choosing properly the permittivity, the permeability, and the thickness of the superstrate. In particular, it is demonstrated that the field in the film-slab is significantly enhanced when the slab is composed by an ϵ-near-zero (ENZ) or low-index metamaterial.
  • References (22)
    22 references, page 1 of 3

    Zheng, Y. J., Liu, H., Wang, S. M., Li, T., Cao, J. X., Li, L., Zhu, C., Wang, Y., Zhu, S. N., Zhang, X.. Selective optical trapping based on strong plasmonic coupling between gold nanorods and slab. Applied Physics Letters. 2011; 98 (8)

    Neves, A. A. R., Fontes, A., De Pozzo, L. Y., De Thomaz, A. A., Chillce, E., Rodriguez, E., Barbosa, L. C., Cesar, C. L.. Electromagnetic forces for an arbitrary optical trapping of a spherical dielectric. Optics Express. 2006; 14 (26): 13101-13106

    Grzegorczyk, T. M., Kong, J. A.. Analytical prediction of stable optical trapping in optical vortices created by three TE or TM plane waves. Optics Express. 2007; 15 (13): 8010-8020

    Verhagen, E., Kuipers, L., Polman, A.. Field enhancement in metallic subwavelength aperture arrays probed by erbium upconversion luminescence. Optics Express. 2009; 17 (17): 14586-14598

    Vassallo, C.. Theory and practical calculation of antireflection coatings on semiconductor laser diode optical amplifiers. IEE Proceedings. 1990; 137 (4): 193-202

    Valagiannopoulos, C. A.. High selectivity and controllability of a parallel-plate component with a filled rectangular ridge. Progress In Electromagnetics Research. 2011; 119: 497-511

    Choe, J.-H., Park, Q. H., Jeon, H.. Effect of metallic slab cladding on photonic crystal band structures. Journal of the Korean Physical Society. 2008; 53 (5): 2591-2595

    Alù, A., Rainwater, D., Kerkhoff, A.. Plasmonic cloaking of cylinders: finite length, oblique illumination and cross-polarization coupling. New Journal of Physics. 2010; 12

    Valagiannopoulos, C. A., Tsitsas, N. L.. Integral equation analysis of a low-profile receiving planar microstrip antenna with a cloaking superstrate. Radio Science. 2012; 47

    Valagiannopoulos, C. A.. Electromagnetic scattering of the field of a metamaterial slab antenna by an arbitrarily positioned cluster of metallic cylinders. Progress in Electromagnetics Research. 2011; 114: 51-66

  • Related Research Results (1)
  • Metrics
    No metrics available
Share - Bookmark