Advantages of microsphere-assisted super-resolution imaging technique over solid immersion lens and confocal microscopies

Arash Darafsheh, Nicholaos I. Limberopoulos, John S. Derov, Dennis E. Walker, Vasily N. Astratov

Research output: Contribution to journalArticlepeer-review

155 Scopus citations

Abstract

We demonstrate a series of advantages of microsphere-assisted imaging over confocal and solid immersion lens microscopies including intrinsic flexibility, better resolution, higher magnification, and longer working distances. We discerned minimal feature sizes of ∼50-60nm in nanoplasmonic arrays at the illumination wavelength λ=405nm. It is demonstrated that liquid-immersed, high-index (n∼1.9-2.1) spheres provide a superior image quality compared to that obtained by spheres with the same index contrast in an air environment. We estimate that using transparent microspheres at deep UV wavelengths of ∼200nm might make possible imaging of various nanostructures with extraordinary high ∼30nm resolution.

Original languageEnglish
Article number061117
JournalApplied Physics Letters
Volume104
Issue number6
DOIs
StatePublished - Oct 2 2014

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