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Selective excitation of surface-polariton Bloch waves for efficient transmission of light through a subwavelength hole array in a thin metal film
KTH, School of Biotechnology (BIO), Theoretical Chemistry.
KTH, School of Biotechnology (BIO), Theoretical Chemistry.ORCID iD: 0000-0002-2442-1809
National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science.
National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science.
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2007 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 76, no 3, 035427- p.Article in journal (Refereed) Published
Abstract [en]

Electromagnetic (EM) field was found to be able to transmit efficiently through a subwavelength hole array in a metal thin film at specific resonant frequencies. By analyzing the near-field distributions of EM fields in the array system, as well as the corresponding Fourier spectra, we show that the surface-polariton (SP) Bloch waves focus the energy of the incident plane-wave EM field to the vicinity of the hole at resonances (through SP scattering provided by the periodic hole). Furthermore, the wave vectors of the SP waves that contribute to the focusing effect are quantized as functions of the geometric shape of the holes in such a way that the focusing effect of the EM energy into the hole is maximal. The transmission efficiency and bandwidth at resonances are found to partially depend on the number of SP modes which contribute to the focusing effect.

Place, publisher, year, edition, pages
2007. Vol. 76, no 3, 035427- p.
Keyword [en]
EXTRAORDINARY OPTICAL-TRANSMISSION; PHOTONIC CRYSTALS; PLASMONS
National Category
Theoretical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-7502DOI: 10.1103/PhysRevB.76.035427ISI: 000248500800147Scopus ID: 2-s2.0-34547110550OAI: oai:DiVA.org:kth-7502DiVA: diva2:12547
Note
QC 20100825Available from: 2007-09-25 Created: 2007-09-25 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Optical properties of active photonic materials
Open this publication in new window or tab >>Optical properties of active photonic materials
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Because of the generation of polaritons, which are quasiparticles possessing the characteristics of both photonics and electronics, active photonic materials offer a possible solution to transfer electromagnetic energy below the diffraction limit and further increase the density of photonic integrated circuits. A theoretical investigation of these exciting materials is, therefore, very important for practical applications.

Four different kinds of polaritons have been studied in this thesis, (1) surface polaritons of negative-index-material cylindric rods, (2) exciton polaritons of semiconductor quantum dots, (3) localized plasmon polaritons of metallic nanoshells, and (4) surface plasmon polaritons of subwavelength hole arrays in thin metal films. All these types of polaritons were found to strongly affect the optical properties of the studied active photonic materials. More specifically, (1) for two-dimensional photonic crystals composed of negative-index-material cylindric rods, the coupling among surface polaritons localized in the rods results in dispersionless anti-crossing bands; (2) for three-dimensional diamond-lattice quantum-dot photonic crystals, the exciton polariton resonances lead to the formation of complete band gaps in the dispersion relationships; (3) for metallic nanoshells, the thickness of the metal shell strongly modifies the localized plasmon polaritons, and therefore influences the degree of localization of the electromagnetic field inside the metallic nanoshells; (4) for subwavelength hole arrays in thin metal films, high-order surface-polariton Bloch waves contribute significantly to the efficient transmission.

To numerically simulate these active photonic materials, we introduced three approaches, (1) an extended plane-wave-based transfer-matrix approach for negative- index-material media, (2) a plane-wave method for semiconductor quantum-dot photonic crystals, and (3) an auxiliary-differential-equation finite-difference time- domain approach for semiconductor quantum-dot arrays. A brief perspective is also given at the end of this thesis.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. 78 p.
Keyword
nanophotonics, plasmonics
National Category
Theoretical Chemistry
Identifiers
urn:nbn:se:kth:diva-4497 (URN)978-91-7178-763-7 (ISBN)
Public defence
2007-10-15, FA32, Main Building, AlbaNova, AlbaNova, 14:00
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Supervisors
Note
QC 20100825Available from: 2007-09-25 Created: 2007-09-25 Last updated: 2010-08-25Bibliographically approved

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Fu, YingÅgren, Hans

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