Optical resolution below λ/4 using synthetic aperture microscopy and evanescent-wave illumination | Zendy

Alexander Neumann | Zendy; Yulia V. Kuznetsova | Zendy; S. R. J. Brueck | Zendy

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Optical resolution below λ/4 using synthetic aperture microscopy and evanescent-wave illumination

Author(s) -

Alexander Neumann,

Yulia V. Kuznetsova,

S. R. J. Brueck

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.020477

Subject(s) - optics , refractive index , resolution (logic) , materials science , substrate (aquarium) , lens (geology) , microscopy , superlens , numerical aperture , aperture (computer memory) , optical microscope , lambda , image resolution , wavelength , physics , scanning electron microscope , oceanography , artificial intelligence , computer science , acoustics , geology

Evanescent-wave illumination is applied to synthetic-aperture microscopy on a transparent solid substrate to extend the resolution limit to lambda/2(n+1) (where n is the substrate refractive index) independent of the lens NA. Using a 633 nm source and a 0.4 NA lens, a resolution to 150 nm (lambda/4.2) is demonstrated on a glass (n = 1.5) substrate. Further extension to approximately 74-nm resolution (lambda/8.6) is projected with a higher index substrate (n = 3.3).

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