Document Detail

Near-Field Dynamics of Optical Yagi-Uda Nanoantennas.
MedLine Citation:
PMID:  21619018     Owner:  NLM     Status:  Publisher    
We present near-field measurements of optical Yagi-Uda nanoantennas that are used in receiving mode. The eigenmode imaging of amplitude and phase by apertureless scanning near-field optical microscopy allows us to investigate the dynamics of the local out-of-plane electric field components and to visualize the temporal evolution of this time-harmonic reception process. The antenna directionality manifests itself by the dependence of the local field enhancement at the feed element on the illumination direction. Simulations taking into account the substrate confirm our observation of the directionality. Our work demonstrates the possibility to characterize multielement nanoantennas by electromagnetic antenna near-field scanners.
Jens Dorfmüller; Daniel Dregely; Moritz Esslinger; Worawut Khunsin; Ralf Vogelgesang; Klaus Kern; Harald Giessen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-27
Journal Detail:
Title:  Nano letters     Volume:  -     ISSN:  1530-6992     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
4. Physikalisches Institut und SCoPE Forschungszentrum, Pfaffenwaldring 57, Universität Stuttgart , 70569 Stuttgart, Germany.
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