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Optimized effective permittivity to improve imaging resolution of multilayered structures in the infrared
KTH, Skolan för elektro- och systemteknik (EES), Elektroteknisk teori och konstruktion.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik, Halvledarmaterial, HMA.
2009 (engelsk)Inngår i: J OPT SOC AM A-OPT IMAGE SCI, ISSN 1084-7529, Vol. 26, nr 2, s. 365-370Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Two periodic structures with different effective impedances, both comprising alternate layers of a positive and a negative permittivity material, are considered in the infrared. We find that the Fabry-Perot resonance effect periodically influences the sharpness of subwavelength focusing as the total thicknesses of the two structures increase, especially for the impedance-matched structure. On the basis of the improved multilayered structures, we design an optimized structure (i.e., the effective impedance is chosen between 0 and 1) for which a higher resolution less than lambda/12 (lambda is the wavelength in the air) can be obtained through weighing the advantages and disadvantages of the two different multilayered structures and choosing appropriate surface terminations.

sted, utgiver, år, opplag, sider
2009. Vol. 26, nr 2, s. 365-370
Emneord [en]
PHOTONIC CRYSTAL
Identifikatorer
URN: urn:nbn:se:kth:diva-12463ISI: 000264036500020Scopus ID: 2-s2.0-60949112109OAI: oai:DiVA.org:kth-12463DiVA, id: diva2:312934
Merknad
QC20100617Tilgjengelig fra: 2010-04-26 Laget: 2010-04-26 Sist oppdatert: 2010-06-17bibliografisk kontrollert
Inngår i avhandling
1. Imaging for subwavelength information with layered metamaterials
Åpne denne publikasjonen i ny fane eller vindu >>Imaging for subwavelength information with layered metamaterials
2010 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH, 2010. s. viii, 57
Serie
Trita-MMK, ISSN 1400-1179 ; 2010:3
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-12467 (URN)
Disputas
2010-04-30, Room D3, Entreplanet, Lindstedtsv 5, KTH, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad
QC20100617Tilgjengelig fra: 2010-04-26 Laget: 2010-04-26 Sist oppdatert: 2010-06-17bibliografisk kontrollert

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