Document Detail

Subwavelength electromagnetic near-field imaging of point dipole with metamaterial nanoslab.
MedLine Citation:
PMID:  19798404     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We investigate near-field imaging of a point dipole by a lossy, nanoscale metamaterial slab. Making use of the electromagnetic angular-spectrum representation, we derive the Green tensor for the field transmission through the metamaterial slab, duly considering multiple reflections, polarizations, and wave-vector signs. With this general formalism, we calculate the point-spread function of the imaging system, which enables us to assess, for instance, resolution and image brightness. Our results demonstrate that with the metamaterial-slab lens one achieves resolution beyond the conventional diffraction limit of half the wavelength. In general, the resolution and image brightness are degraded when the slab thickness and absorption increase, but we show that in some cases the resolution is rather insensitive to the magnitude of the losses in the metamaterial.
Timo Hakkarainen; Tero Set?l?; Ari T Friberg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  26     ISSN:  1520-8532     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-10-02     Completed Date:  2010-02-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9800943     Medline TA:  J Opt Soc Am A Opt Image Sci Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2226-34     Citation Subset:  -    
Department of Applied Physics, Helsinki University of Technology, P. O. Box 3500, FI-02015 TKK, Finland.
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