We experimentally apply incoherent Fourier ptychography to enhance the resolution of recorded images by projecting known, uncorrelated, random patterns at high speed onto 3D moving and distant objects. We find that the resolution enhancement factor can be greater than 2, depending on the projection and camera optics.
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http://dx.doi.org/10.1364/AO.505275 | DOI Listing |
J Chem Phys
August 2024
Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
The multiphoton excitation pathways of plasmonic nanorod assemblies are described. By using dolmen structures formed from the directed assembly of three gold nanorods, plasmon-mediated three-photon excitation is resolved. These high-order multiphoton excitation channels were accessed by resonantly exciting a hybrid mode of the dolmen structure that was resonant with the 800-nm carrier wavelength of an ultrafast laser system.
View Article and Find Full Text PDFMagn Reson Med
November 2024
National Engineering Research Center of Advanced Magnetic Resonance Technologies for Diagnosis and Therapy, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
Purpose: To reduce the ringing artifacts of the motion-resolved images in free-breathing dynamic pulmonary MRI.
Methods: A golden-step based interleaving (GSI) technique was proposed to reduce ringing artifacts induced by diaphragm drifting. The pulmonary MRI data were acquired using a superior-inferior navigated 3D radial UTE sequence in an interleaved manner during free breathing.
Lasers with high spectral purity are indispensable for optical clocks and for the coherent manipulation of atomic and molecular qubits in applications such as quantum computing and quantum simulation. While the stabilization of such lasers to a reference can provide a narrow linewidth, the widely used diode lasers exhibit fast phase noise that prevents high-fidelity qubit manipulation. In this paper, we demonstrate a self-injection locked diode laser system that utilizes a high-finesse cavity.
View Article and Find Full Text PDFAn aberration correction method is introduced for 3D phase deconvolution microscopy. Our technique capitalizes on multiple illumination patterns to iteratively extract Fourier space aberrations, utilizing the overlapping information inherent in these patterns. By refining the point spread function based on the retrieved aberration data, we significantly improve the precision of refractive index deconvolution.
View Article and Find Full Text PDFChem Asian J
July 2024
School of Chemistry, The University of Sydney, Sydney, New South Wales, 2006, Australia.
The thermal transformation of the tetragonal-zircon (tz-) to tetragonal-scheelite (ts-)BiVO was studied by in situ synchrotron X-ray diffraction, thermogravimetric analysis, and Fourier-transformed infrared spectroscopy. Upon heating, the tetragonal zircon polymorph of BiVO (tz-BiVO) transitioned to the ts-polymorph between 693-773 K. Above 773 K, single phase ts-BiVO was observed before transitioning to the monoclinic fergusonite (mf-) polymorph upon cooling.
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