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Title: Electromagnetic near-field interactions of a dipolar emitter with metal and metamaterial nanoslabs

Abstract

We investigate the emission properties of a polarizable point dipole placed within a subwavelength distance from a silver or a slightly absorbing, negative-index metamaterial nanoslab. Using electromagnetic theory we show that in the immediate vicinity of the slab the dipole-slab interaction prevents the dipole from radiating. For the metamaterial slab close to the perfect-lens arrangement, the interaction is relatively weak and of short range. In particular, a region exists in the near zone of the metamaterial slab where the dipole emission is not disturbed by the interaction, and a bright intensity distribution of subwavelength width is created on the opposite side of the slab. This suggests that a low-loss metamaterial slab can act as a near-field imaging device which does not disturb the object. For the silver slab the interaction is stronger and it reaches over the near-field zone, adversely influencing the imaging capabilities in terms of brightness and resolution. The results are important for the development of metal and metamaterial superlenses.

Authors:
;  [1];  [1];  [2];  [3]
  1. Department of Applied Physics, Aalto University, P.O. Box 13500, FI-00076 Aalto (Finland)
  2. (Finland)
  3. (Sweden)
Publication Date:
OSTI Identifier:
22072213
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 77 NANOSCIENCE AND NANOTECHNOLOGY; DIPOLES; EMISSION; INTERACTIONS; NANOSTRUCTURES; SILVER

Citation Formats

Hakkarainen, Timo, Setaelae, Tero, Friberg, Ari T., Department of Physics and Mathematics, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, and Department of Microelectronics and Applied Physics, Royal Institute of Technology, Electrum 229, SE-164 40 Kista. Electromagnetic near-field interactions of a dipolar emitter with metal and metamaterial nanoslabs. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.033849.
Hakkarainen, Timo, Setaelae, Tero, Friberg, Ari T., Department of Physics and Mathematics, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, & Department of Microelectronics and Applied Physics, Royal Institute of Technology, Electrum 229, SE-164 40 Kista. Electromagnetic near-field interactions of a dipolar emitter with metal and metamaterial nanoslabs. United States. doi:10.1103/PHYSREVA.84.033849.
Hakkarainen, Timo, Setaelae, Tero, Friberg, Ari T., Department of Physics and Mathematics, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, and Department of Microelectronics and Applied Physics, Royal Institute of Technology, Electrum 229, SE-164 40 Kista. 2011. "Electromagnetic near-field interactions of a dipolar emitter with metal and metamaterial nanoslabs". United States. doi:10.1103/PHYSREVA.84.033849.
@article{osti_22072213,
title = {Electromagnetic near-field interactions of a dipolar emitter with metal and metamaterial nanoslabs},
author = {Hakkarainen, Timo and Setaelae, Tero and Friberg, Ari T. and Department of Physics and Mathematics, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu and Department of Microelectronics and Applied Physics, Royal Institute of Technology, Electrum 229, SE-164 40 Kista},
abstractNote = {We investigate the emission properties of a polarizable point dipole placed within a subwavelength distance from a silver or a slightly absorbing, negative-index metamaterial nanoslab. Using electromagnetic theory we show that in the immediate vicinity of the slab the dipole-slab interaction prevents the dipole from radiating. For the metamaterial slab close to the perfect-lens arrangement, the interaction is relatively weak and of short range. In particular, a region exists in the near zone of the metamaterial slab where the dipole emission is not disturbed by the interaction, and a bright intensity distribution of subwavelength width is created on the opposite side of the slab. This suggests that a low-loss metamaterial slab can act as a near-field imaging device which does not disturb the object. For the silver slab the interaction is stronger and it reaches over the near-field zone, adversely influencing the imaging capabilities in terms of brightness and resolution. The results are important for the development of metal and metamaterial superlenses.},
doi = {10.1103/PHYSREVA.84.033849},
journal = {Physical Review. A},
number = 3,
volume = 84,
place = {United States},
year = 2011,
month = 9
}