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Near-field imaging of interacting nano objects with metal and metamaterial superlenses
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
2012 (English)In: New Journal of Physics, ISSN 1367-2630, Vol. 14, 043019- p.Article in journal (Refereed) Published
Abstract [en]

Employing rigorous electromagnetic theory we investigate optical the near-field imaging of two interacting dipole-like objects with metal and slightly lossy metamaterial nanoslab superlenses. Our analysis indicates that the dipole emission is suppressed by near-field interactions when the objects are close to the lens or each other. This strongly influences the image quality, in particular with objects of small size and high polarizability. The interference from two nearby objects also affects the resolution and subwavelength definition can only be obtained for objects with dipole moments predominantly orthogonal to the slab. Such an optimal imaging condition is achieved with excitation by total internal reflection. With simulations we show that in these circumstances, subwavelength resolutions of about lambda/5 for silver superlens and lambda/10 for metamaterial slab are reached.

Place, publisher, year, edition, pages
2012. Vol. 14, 043019- p.
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-96446DOI: 10.1088/1367-2630/14/4/043019ISI: 000303674000001ScopusID: 2-s2.0-84860179170OAI: diva2:530935
QC 20120605Available from: 2012-06-05 Created: 2012-06-04 Last updated: 2012-06-05Bibliographically approved

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Friberg, Ari T.
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