Ultimate limit of resolution of subwavelength imaging devices formed by metallic rods

Mário G. Silveirinha; Pavel A. Belov; Constantin R. Simovski

doi:10.1364/OL.33.001726

Optics Letters
Vol. 33,
Issue 15,
pp. 1726-1728
(2008)
•https://doi.org/10.1364/OL.33.001726

Ultimate limit of resolution of subwavelength imaging devices formed by metallic rods

Mário G. Silveirinha, Pavel A. Belov, and Constantin R. Simovski

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Mário G. Silveirinha, Pavel A. Belov, and Constantin R. Simovski, "Ultimate limit of resolution of subwavelength imaging devices formed by metallic rods," Opt. Lett. 33, 1726-1728 (2008)

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- Imaging Systems
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About this Article
History
- Original Manuscript: April 14, 2008
- Manuscript Accepted: April 25, 2008
- Published: July 29, 2008
Virtual Issues
Virtual Journal for Biomedical Optics Vol. 3, Iss. 9

Abstract

It is demonstrated that the ultimate physical limit of resolution of novel imaging devices based on arrays of metallic rods is determined by the skin depth of the metal. Our theoretical and numerical results show that wire medium lenses may provide a unique solution for subwavelength imaging at frequencies up to the terahertz range and may enable image formation at a significant distance from the source plane.

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	$100 MHz$	$1 GHz$	$10 GHz$	$100 GHz$	$1 THz$	$10 THz$
Ag	$λ ∕ 116000$ $(26 μ m)$	$λ ∕ 37000$ $(8.2 μ m)$	$λ ∕ 11600$ $(2.6 μ m)$	$λ ∕ 3700$ $(0.8 μ m)$	$λ ∕ 1265$ $(237 nm)$	$λ ∕ 320$ $(94 nm)$
Au	$λ ∕ 95000$ $(32 μ m)$	$λ ∕ 30000$ $(10 μ m)$	$λ ∕ 9500$ $(3.2 μ m)$	$λ ∕ 3020$ $(1.0 μ m)$	$λ ∕ 1010$ $(297 nm)$	$λ ∕ 300$ $(100 nm)$
Al	$λ ∕ 90000$ $(33 μ m)$	$λ ∕ 28000$ $(11 μ m)$	$λ ∕ 9000$ $(3.3 μ m)$	$λ ∕ 2850$ $(1.1 μ m)$	$λ ∕ 923$ $(325 nm)$	$λ ∕ 324$ $(93 nm)$
Cu	$λ ∕ 75000$ $(41 μ m)$	$λ ∕ 23000$ $(13 μ m)$	$λ ∕ 7500$ $(4.1 μ m)$	$λ ∕ 2340$ $(1.3 μ m)$	$λ ∕ 776$ $(387 nm)$	$λ ∕ 248$ $(121 nm)$

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