Weinberg, Gil, Uri Weiss, and Ori Katz. “Image scanning lensless fiber-bundle endomicroscopy”. arXiv preprint arXiv:2305.14807 (2023). Web. Publisher's Version
Haim, Omri, Jeremy Boger-Lombard, and Ori Katz. “Image-guided Computational Holographic Wavefront Shaping”. arXiv preprint arXiv:2305.12232 (2023). Web. Publisher's Version
Sommer, Tal I., Gil Weinberg, and Ori Katz. “K-space interpretation of image-scanning-microscopy”. Applied Physics Letters 122.14 (2023): , 122, 14, 141106. Web. Publisher's Version
Boger-Lombard, Jeremy, Yevgeny Slobodkin, and Ori Katz. “Towards passive non-line-of-sight acoustic localization around corners using uncontrolled random noise sources”. Scientific Reports 13.1 (2023): , 13, 1, 4952. Web. Publisher's Version
Caravaca-Aguirre, Antonio M, et al.Single-pixel photoacoustic microscopy with speckle illumination”. Intelligent Computing (2023). Web. Publisher's Version
Accanto, Nicolò, et al.A flexible two-photon fiberscope for fast activity imaging and precise optogenetic photostimulation of neurons in freely moving mice”. Neuron (2022). Web. Publisher's Version
Berrebi, Avraham, et al.Optical protection of alkali-metal atoms from spin relaxation”. arXiv preprint arXiv:2209.12360 (2022). Print.
Badt, Noam, and Ori Katz. “Real-time holographic lensless micro-endoscopy through flexible fibers via fiber bundle distal holography”. Nature Communications 13.1 (2022): , 13, 1, 1-9. Web. Publisher's Version
Bertolotti, Jacopo, and Ori Katz. “Imaging in complex media”. Nature Physics 18.9 (2022): , 18, 9, 1008-1017. Web. Publisher's Version
Slobodkin, Yevgeny, et al.Massively degenerate coherent perfect absorber forarbitrary wavefronts”. Science 377.6609 (2022): , 377, 6609, 995-998. Web. Publisher's Version
Choi, Wonjun, et al.Flexible-type ultrathin holographic endoscope for microscopic imaging of unstained biological tissues”. Nature communications 13.1 (2022): , 13, 1, 1-10. Web. Publisher's Version
Gigan, Sylvain, et al.Roadmap on Wavefront Shaping and deep imaging in complex media”. Journal of Physics: Photonics (2022). Web. Publisher's Version
Bloch, Itay M, et al.New constraints on axion-like dark matter using a Floquet quantum detector”. Science advances 85 (2022). Web. Publisher's Version
Arjmand, Payvand, et al.Three-dimensional broadband light beam manipulation in forward scattering samples”. Optics Express 29.5 (2021): , 29, 5, 6563-6581. Web. Publisher's Version
Sommer, Tal I., and Ori Katz. “Pixel-reassignment in ultrasound imaging”. Applied Physics Letters 119.12 (2021): , 119, 12, 123701. Web. Publisher's Version
Rosenfeld, Moriya, et al.Acousto-optic ptychography”. Optica 86 (2021): , 8, 6, 936–943. Web. Publisher's VersionAbstract

Acousto-optic imaging (AOI) enables optical-contrast imaging deep inside scattering samples via localized ultrasound-modulation of scattered light. While AOI allows optical investigations at depths, its imaging resolution is inherently limited by the ultrasound wavelength, prohibiting microscopic investigations. Here, we propose a computational imaging approach that allows optical diffraction-limited imaging using a conventional AOI system. We achieve this by extracting diffraction-limited imaging information from speckle correlations in the conventionally detected ultrasound-modulated scattered-light fields. Specifically, we identify that since ``memory-effect'' speckle correlations allow estimation of the Fourier magnitude of the field inside the ultrasound focus, scanning the ultrasound focus enables robust diffraction-limited reconstruction of extended objects using ptychography (i.e., we exploit the ultrasound focus as the scanned spatial-gate probe required for ptychographic phase retrieval). Moreover, we exploit the short speckle decorrelation-time in dynamic media, which is usually considered a hurdle for wavefront-shaping- based approaches, for improved ptychographic reconstruction. We experimentally demonstrate noninvasive imaging of targets that extend well beyond the memory-effect range, with a 40-times resolution improvement over conventional AOI.

Yeminy, Tomer, and Ori Katz. “Guidestar-free image-guided wavefront shaping”. Science Advances 721 (2021): , 7, 21, eabf5364. Web. Publisher's Version
Shekel, Noam, and Ori Katz. “Using fiber-bending-generated speckles for improved working distance and background rejection in lensless micro-endoscopy”. Opt. Lett. 45.15 (2020): , 45, 15, 4288–4291. Web. Publisher's VersionAbstract

Lensless flexible fiber-bundle-based endoscopes allow imaging at depths beyond the reach of conventional microscopes with a minimal footprint. These multicore fibers provide a simple solution for wide-field fluorescent imaging when the target is adjacent to the fiber facet. However, they suffer from a very limited working distance and out-of-focus background. Here, we carefully study the dynamic speckle illumination patterns generated by bending a commercial fiber bundle and show that they can be exploited to allow extended working distance and background rejection, using a super-resolution fluctuations imaging analysis of multiple frames, without the addition of any optical elements.

Weinberg, Gil, and Ori Katz. “100,000 frames-per-second compressive imaging with a conventional rolling-shutter camera by random point-spread-function engineering”. Opt. Express 28.21 (2020): , 28, 21, 30616–30625. Web. Publisher's VersionAbstract

We demonstrate an approach that allows taking videos at very high frame-rates of over 100,000 frames per second by exploiting the fast sampling rate of the standard rolling-shutter readout mechanism, common to most conventional sensors, and a compressive-sampling acquisition scheme. Our approach is directly applied to a conventional imaging system by the simple addition of a diffuser to the pupil plane that randomly encodes the entire field-of-view to each camera row, while maintaining diffraction-limited resolution. A short video is reconstructed from a single camera frame via a compressed-sensing reconstruction algorithm, exploiting the inherent sparsity of the imaged scene.

Doktofsky, Daniel, Moriya Rosenfeld, and Ori Katz. “Acousto optic imaging beyond the acoustic diffraction limit using speckle decorrelation”. Communications Physics 31 (2020): , 3, 1, 1-8. Web. Publisher's Version