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Title: Classical imaging theory of a microlens with super-resolution
Authors: Duan, Yubo
Barbastathis, George
Zhang, Baile
Issue Date: 2013
Source: Duan, Y., Barbastathis, G., & Zhang, B. (2013). Classical imaging theory of a microlens with super-resolution. Optics Letters, 38(16), 2988-2990.
Series/Report no.: Optics letters
Abstract: Super-resolution in imaging through a transparent spherical microlens has attracted lots of attention because of recent promising experimental results with remarkable resolution improvement. To provide physical insight for this super-resolution phenomenon, previous studies adopted a phenomenological explanation mainly based on the super-focusing effect of a photonic nanojet, while a direct imaging calculation with classical imaging theory has rarely been studied. Here we theoretically model the imaging process through a microlens with vectorial electromagnetic analysis, and then exclude the previously plausible explanation of super-resolution based on the super-focusing effect. The results showed that, in the context of classical imaging theory subject to the two-point resolution criterion, a microlens with a perfect spherical shape cannot achieve the experimentally verified sub-100 nm resolution. Therefore, there must be some other physical mechanisms that contribute to the reported ultrahigh resolution but have not been revealed in theory.
DOI: 10.1364/OL.38.002988
Schools: School of Physical and Mathematical Sciences 
Rights: © 2013 Optical Society of America. This is the author created version of a work that has been peer reviewed and accepted for publication by Optics Letters, Optical Society of America. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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