Correction: Localized plasmon assisted structured illumination microscopy for wide-field high-speed dispersion-independent super resolution imaging

AbstractStructured illumination microscopy (SIM) is a well-established fluorescence imaging technique, which can increase spatial resolution by up to a factor of two. This article reports on a new way to extend the capabilities of structured illumination microscopy, by combining ideas from the fields of illumination engineering and nanophotonics. In this technique, plasmonic arrays of hexagonal symmetry are illuminated by two obliquely incident beams originating from a single laser. The resulting interference between the light grating and plasmonic grating creates a wide range of spatial frequencies above the microscope passband, while still preserving the spatial frequencies of regular SIM. To systematically investigate this technique and to contrast it with regular SIM and localized plasmon SIM, we implement a rigorous simulation procedure, which simulates the near-field illumination of the plasmonic grating and uses it in the subsequent forward imaging model. The inverse problem, of obtaining a super-resolution (SR) image from multiple low-resolution images, is solved using a numerical reconstruction algorithm while the obtained resolution is quantitatively assessed. The results point at the possibility of resolution enhancements beyond regular SIM, which rapidly vanishes with the height above the grating. In an initial experimental realization, the existence of the expected spatial frequencies is shown and the performance of compatible reconstruction approaches is compared. Finally, we discuss the obstacles of experimental implementations that would need to be overcome for artifact-free SR imaging.

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Super-Resolution Imaging in Fluid Mechanics Using New Illumination Approaches

Annual Review of Fluid Mechanics ◽

10.1146/annurev-fluid-010719-060059 ◽

2020 ◽

Vol 52 (1) ◽

pp. 369-393

Author(s):

Minami Yoda

Keyword(s):

Fluid Mechanics ◽

Total Internal Reflection ◽

Imaging Techniques ◽

Super Resolution ◽

Internal Reflection ◽

Interfacial Flows ◽

Structured Illumination ◽

Structured Illumination Microscopy ◽

Entire Volume ◽

Resolution Imaging

Quantifying submillimeter flows using optical diagnostic techniques is often limited by a lack of spatial resolution and optical access. This review discusses two super-resolution imaging techniques, structured illumination microscopy and total internal reflection fluorescence or microscopy, which can visualize bulk and interfacial flows, respectively, at spatial resolutions below the classic diffraction limits. First, we discuss the theory and applications of structured illumination for optical sectioning, i.e., imaging a thin slice of a flow illuminated over its entire volume. Structured illumination can be used to visualize the interior of multiphase flows such as sprays by greatly reducing secondary scattering. Second, the theory underlying evanescent waves is introduced, followed by a review of how total internal reflection microscopy has been used to visualize interfacial flows over the last 15 years. Both techniques, which are starting to be used in fluid mechanics, could significantly improve quantitative imaging of microscale and macroscale flows.

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Super-resolution imaging of fluorescent dipoles via polarized structured illumination microscopy

Nature Communications ◽

10.1038/s41467-019-12681-w ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 16

Author(s):

Karl Zhanghao ◽

Xingye Chen ◽

Wenhui Liu ◽

Meiqi Li ◽

Yiqiong Liu ◽

...

Keyword(s):

Hippocampal Neurons ◽

Fluorescent Protein ◽

Imaging Modality ◽

Super Resolution ◽

Vital Role ◽

Molecular Structures ◽

Polarization Microscopy ◽

Structured Illumination ◽

Structured Illumination Microscopy ◽

Resolution Imaging

Abstract Fluorescence polarization microscopy images both the intensity and orientation of fluorescent dipoles and plays a vital role in studying molecular structures and dynamics of bio-complexes. However, current techniques remain difficult to resolve the dipole assemblies on subcellular structures and their dynamics in living cells at super-resolution level. Here we report polarized structured illumination microscopy (pSIM), which achieves super-resolution imaging of dipoles by interpreting the dipoles in spatio-angular hyperspace. We demonstrate the application of pSIM on a series of biological filamentous systems, such as cytoskeleton networks and λ-DNA, and report the dynamics of short actin sliding across a myosin-coated surface. Further, pSIM reveals the side-by-side organization of the actin ring structures in the membrane-associated periodic skeleton of hippocampal neurons and images the dipole dynamics of green fluorescent protein-labeled microtubules in live U2OS cells. pSIM applies directly to a large variety of commercial and home-built SIM systems with various imaging modality.

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Super-Resolution Imaging by Dual Iterative Structured Illumination Microscopy

10.1101/2021.05.12.443720 ◽

2021 ◽

Author(s):

Anna Loeschberger ◽

Yauheni Novikau ◽

Ralf Netz ◽

Marie-Christin Spindler ◽

Ricardo Benavente ◽

...

Keyword(s):

Three Dimensional ◽

Brain Slices ◽

Super Resolution ◽

Reconstruction Algorithm ◽

Living Cells ◽

Structured Illumination ◽

Structured Illumination Microscopy ◽

Spatiotemporal Resolution ◽

Coated Pits ◽

Resolution Imaging

Three-dimensional (3D) multicolor super-resolution imaging in the 50-100 nm range in fixed and living cells remains challenging. We extend the resolution of structured illumination microscopy (SIM) by an improved nonlinear iterative reconstruction algorithm that enables 3D multicolor imaging with improved spatiotemporal resolution at low illumination intensities. We demonstrate the performance of dual iterative SIM (diSIM) imaging cellular structures in fixed cells including synaptonemal complexes, clathrin coated pits and the actin cytoskeleton with lateral resolutions of 60-100 nm with standard fluorophores. Furthermore, we visualize dendritic spines in 70 micrometer thick brain slices with an axial resolution < 200 nm. Finally, we image dynamics of the endoplasmatic reticulum and microtubules in living cells with up to 255 frames/s.

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A technique for resolution assessment in blind-SIM experiments

10.1101/2021.09.01.458550 ◽

2021 ◽

Author(s):

Imen Boujmil ◽

Giancarlo Ruocco ◽

Marco Leonetti

Keyword(s):

High Resolution ◽

Biological Sample ◽

A Priori ◽

Resolution Enhancement ◽

Super Resolution ◽

Experimental Setup ◽

Wide Field ◽

Structured Illumination ◽

Structured Illumination Microscopy ◽

Resolution Measurement

Super resolution techniques are an excellent alternative to wide field microscopy, providing high resolution also in (typically fragile) biological sample. Among the various super resolution techniques, Structured Illumination Microscopy (SIM) improve resolution by employing multiple illumination patterns to be deconvolved with a dedicated software. In the case of blind SIM techniques, unknown patterns, such as speckles, are used, thus providing super resolved images, nearly unaffected by aberrations with a simplified experimental setup. Scattering Assisted Imaging, a special blind SIM technique, exploits an illumination PSF (speckle grains size), smaller than the collection PSF (defined by the collection objectives), to surpass the typical SIM resolution enhancement. However, if SAI is used, it is very difficult to extract the resolution enhancement form a priori considerations. In this paper we propose a protocol and experimental setup for the resolution measurement, demonstrating the resolution enhancement for different collection PSF values.

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label-free super-resolution imaging through second-harmonic generation structured illumination microscopy

Quantitative Phase Imaging VII ◽

10.1117/12.2578579 ◽

2021 ◽

Author(s):

Andreas Zheng ◽

Nansen Zhou ◽

Renjie Zhou

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Super Resolution ◽

Label Free ◽

Structured Illumination ◽

Structured Illumination Microscopy ◽

Resolution Imaging

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Nanoscale imaging of bacterial infections by sphingolipid expansion microscopy

Nature Communications ◽

10.1038/s41467-020-19897-1 ◽

2020 ◽

Vol 11 (1) ◽

Author(s):

Ralph Götz ◽

Tobias C. Kunz ◽

Julian Fink ◽

Franziska Solger ◽

Jan Schlegel ◽

...

Keyword(s):

Lipid Bilayers ◽

Bacterial Infections ◽

Super Resolution ◽

Structured Illumination ◽

Structured Illumination Microscopy ◽

Nanoscale Imaging ◽

Intracellular Organelles ◽

Resolution Imaging ◽

Simkania Negevensis ◽

20 Nm

AbstractExpansion microscopy (ExM) enables super-resolution imaging of proteins and nucleic acids on conventional microscopes. However, imaging of details of the organization of lipid bilayers by light microscopy remains challenging. We introduce an unnatural short-chain azide- and amino-modified sphingolipid ceramide, which upon incorporation into membranes can be labeled by click chemistry and linked into hydrogels, followed by 4× to 10× expansion. Confocal and structured illumination microscopy (SIM) enable imaging of sphingolipids and their interactions with proteins in the plasma membrane and membrane of intracellular organelles with a spatial resolution of 10–20 nm. As our functionalized sphingolipids accumulate efficiently in pathogens, we use sphingolipid ExM to investigate bacterial infections of human HeLa229 cells by Neisseria gonorrhoeae, Chlamydia trachomatis and Simkania negevensis with a resolution so far only provided by electron microscopy. In particular, sphingolipid ExM allows us to visualize the inner and outer membrane of intracellular bacteria and determine their distance to 27.6 ± 7.7 nm.

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High-speed multiplane structured illumination microscopy of living cells using an image-splitting prism

Nanophotonics ◽

10.1515/nanoph-2019-0346 ◽

2019 ◽

Vol 9 (1) ◽

pp. 143-148

Author(s):

Adrien Descloux ◽

Marcel Müller ◽

Vytautas Navikas ◽

Andreas Markwirth ◽

Robin van den Eynde ◽

...

Keyword(s):

High Speed ◽

Three Dimensional ◽

Super Resolution ◽

Optical Element ◽

Spatial Light Modulators ◽

Structured Illumination ◽

Structured Illumination Microscopy ◽

Image Stack ◽

Light Modulators ◽

3D Information

AbstractSuper-resolution structured illumination microscopy (SR-SIM) can be conducted at video-rate acquisition speeds when combined with high-speed spatial light modulators and sCMOS cameras, rendering it particularly suitable for live-cell imaging. If, however, three-dimensional (3D) information is desired, the sequential acquisition of vertical image stacks employed by current setups significantly slows down the acquisition process. In this work, we present a multiplane approach to SR-SIM that overcomes this slowdown via the simultaneous acquisition of multiple object planes, employing a recently introduced multiplane image splitting prism combined with high-speed SIM illumination. This strategy requires only the introduction of a single optical element and the addition of a second camera to acquire a laterally highly resolved 3D image stack. We demonstrate the performance of multiplane SIM by applying this instrument to imaging the dynamics of mitochondria in living COS-7 cells.

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