Defocused imaging exploits supercritical-angle fluorescence emission for precise axial single molecule localization microscopy: erratum

Zelger, Philipp; Bodner, Lisa; Veľas, Lukáš; Schütz, Gerhard J.; Jesacher, Alexander

doi:10.1364/boe.408790

Cited by 1 publication

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“…2 show 3D localization precisions for molecule positions ranging from 0 to 230 nm. The graphs are based on calculated Cramér-Rao lower bounds [ 33 , 47 , 48 ], assuming a UAF signal of 2000 photons and a background level of 100 photons per pixel. The best parameters obtained are stated above the graphs.…”

Section: Localization Performance Close To the Coverslipmentioning

confidence: 99%

Three-dimensional single molecule localization close to the coverslip: a comparison of methods exploiting supercritical angle fluorescence

Zelger¹,

Bodner²,

Offterdinger³

et al. 2021

Biomed. Opt. Express

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The precise spatial localization of single molecules in three dimensions is an important basis for single molecule localization microscopy (SMLM) and tracking. At distances up to a few hundred nanometers from the coverslip, evanescent wave coupling into the glass, also known as supercritical angle fluorescence (SAF), can strongly improve the axial precision, thus facilitating almost isotropic localization performance. Specific detection systems, introduced as Supercritical angle localization microscopy (SALM) or Direct optical nanoscopy with axially localized detection (DONALD), have been developed to exploit SAF in modified two-channel imaging schemes. Recently, our group has shown that off-focus microscopy, i.e., imaging at an intentional slight defocus, can perform equally well, but uses only a single detection arm. Here we compare SALM, off-focus imaging and the most commonly used 3D SMLM techniques, namely cylindrical lens and biplane imaging, regarding 3D localization in close proximity to the coverslip. We show that all methods gain from SAF, which leaves a high detection NA as the only major key requirement to unlock the SAF benefit. We find parameter settings for cylindrical lens and biplane imaging for highest z-precision. Further, we compare the methods in view of robustness to aberrations, fixed dipole emission and double-emitter events. We show that biplane imaging provides the best overall performance and support our findings by DNA-PAINT experiments on DNA-nanoruler samples. Our study sheds light on the effects of SAF for SMLM and is helpful for researchers who plan to employ localization-based 3D nanoscopy close to the coverslip.

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Section: Localization Performance Close To the Coverslipmentioning

confidence: 99%