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Subwavelength focusing with a multilayered Fabry-Perot structure at optical frequencies
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-3401-1125
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
2007 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 75, no 4, 045103- p.Article in journal (Refereed) Published
Abstract [en]

The Fabry-Perot resonance effect is studied in order to achieve subwavelength imaging at a far distance (e.g., about 10 wavelengths) from the source at optical frequencies. Two different structures (with matched and mismatched impedances) of alternative metal and air layers are considered first at a relatively short distance (e.g., about one wavelength) from the source. It is found that the impedance match is not necessary for subwavelength focusing since the Fabry-Perot resonance effect is utilized here. An appropriate period is chosen so that the Fabry-Perot resonance occurs in an evanescent regime, and consequently the evanescent waves near the Fabry-Perot resonance peak are amplified. With such a mechanism, a super lens with a resolution of about λ0/30 (λ0 is the wavelength in the air), acceptable sidelobes and a larger displacement range (when the thickness of the period is within such a displacement range, subwavelength focusing with acceptable sidelobes can be achieved) is designed. Subwavelength focusing (with a spotsize of λ0/12) at a distance far away from the source is also realized in the presence of some material loss.

Place, publisher, year, edition, pages
2007. Vol. 75, no 4, 045103- p.
Keyword [en]
PERFECT LENS, NEAR-FIELD
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-12461DOI: 10.1103/PhysRevB.75.045103ISI: 000243895600020Scopus ID: 2-s2.0-33846352516OAI: oai:DiVA.org:kth-12461DiVA: diva2:312921
Note
QC20100617Available from: 2010-04-26 Created: 2010-04-26 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Imaging for subwavelength information with layered metamaterials
Open this publication in new window or tab >>Imaging for subwavelength information with layered metamaterials
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH, 2010. viii, 57 p.
Series
Trita-MMK, ISSN 1400-1179 ; 2010:3
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-12467 (URN)
Public defence
2010-04-30, Room D3, Entreplanet, Lindstedtsv 5, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC20100617Available from: 2010-04-26 Created: 2010-04-26 Last updated: 2010-06-17Bibliographically approved

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He, Sailing

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