Negative effective permeability and left-handed materials at optical frequencies

Optics Express

Volumn 14, Issue 4, 2006, Pages 1557-1567

  Alu A ^a   Salandrino, A ^a   Engheta, N ^b  

^a ROMA TRE UNIVERSITY   (Italy)

^b UNIVERSITY OF PENNSYLVANIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

IMAGING TECHNIQUES; MAGNETIC MOMENTS; NANOSTRUCTURED MATERIALS; NATURAL FREQUENCIES; PLASMAS;

NANO-INCLUSIONS; OPTICAL DOMAIN; OPTICAL FREQUENCIES;

INCLUSIONS;

EID: 33144463207     PISSN: 10944087     EISSN: 10944087     Source Type: Journal    
DOI: 10.1364/OE.14.001557     Document Type: Article

References (22)

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16. The forms of excitations used in Eqs. (2) and (12) are solely employed for the purpose of isolating respectively the magnetic and electric response of the nano-ring of Fig. 1 from one another, which is necessary for evaluating the polarizability coefficients separately. Once these coefficients are determined, they indeed represent the polarizability response of the material to any form of excitation (e.g., a plane wave). This approach is commonly used in the technical literature (see, e.g., [15]).
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21. The Drude model employed here accurately describes the frequency dispersion of silver over all the visible frequencies [20]. The minimal difference between this model and realistic experimental data, possibly due to the finite size of the spheres, resonant interband transitions in the material, etc., would not significantly affect the present discussion and approach, since the inherent resonant phenomena here described may only be slightly shifted in frequency or modified in strength, still preserving the validity of the concepts pointed out here.
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