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Photonics 2017, 4(3), 39;

Phase Mask-Based Multimodal Superresolution Microscopy

Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, MD 20899, USA
Author to whom correspondence should be addressed.
Received: 2 May 2017 / Revised: 22 June 2017 / Accepted: 30 June 2017 / Published: 6 July 2017
(This article belongs to the Special Issue Superresolution Optical Microscopy)
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We demonstrate a multimodal superresolution microscopy technique based on a phase masked excitation beam in combination with spatially filtered detection. The theoretical foundation for calculating the focus from a non-paraxial beam with an arbitrary azimuthally symmetric phase mask is presented for linear and two-photon excitation processes as well as the theoretical resolution limitations. Experimentally this technique is demonstrated using two-photon luminescence from 80 nm gold particle as well as two-photon fluorescence lifetime imaging of fluorescent polystyrene beads. Finally to illustrate the versatility of this technique we acquire two-photon fluorescence lifetime, two-photon luminescence, and second harmonic images of a mixture of fluorescent molecules and 80 nm gold particles with <120 nm resolution ( λ /7). Since this approach exclusively relies on engineering the excitation and collection volumes, it is suitable for a wide range of scanning-based microscopies. View Full-Text
Keywords: microscopy; superresolution; nonlinear microscopy microscopy; superresolution; nonlinear microscopy

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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MDPI and ACS Style

Beams, R.; Woodcock, J.W.; Gilman, J.W.; Stranick, S.J. Phase Mask-Based Multimodal Superresolution Microscopy. Photonics 2017, 4, 39.

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