Abstract
Superoscillating function is a band-limited function that is locally oscillating faster than its highest Fourier component. In this work, we study and implement methods to generate multi-lobe optical superoscillating beams, with nearly constant intensity and constant local frequency. We generated superoscillating patterns having up to 12 sub-wavelength oscillations, with local frequency of 20% to 40% above the band-limit. We then test the potential application of these beams to super-resolution structured illumination microscopy. By utilizing the Moiré effect on a fluorescent grating, we have demonstrated experimentally resolution improvement over the conventional sinusoidal illumination. Our simulations show that structured illumination microscopy with super oscillating multi-lobe beams can provide more than twofold improvement in resolution, with respect to the classical diffraction limit and for coherent or incoherent modalities.
Original language | English |
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Pages (from-to) | 34530-34541 |
Number of pages | 12 |
Journal | Optics Express |
Volume | 27 |
Issue number | 24 |
DOIs | |
State | Published - 2019 |
Bibliographical note
Publisher Copyright:© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement