23 papers · ranked by Valyu relevance
Gang Xiong, Oussama Moutanabbir, Manfred Reiche, Ross Harder + 1 more
'Ian Robinson'] Coherent X-ray diffraction imaging (CDI) has emerged in the last decade as a promising high resolution lens-less imaging approach for the characterization of various samples. It has made significant technical progress through developments in source, algorithm and imaging methodologies thus enabling…
Giorgio Margaritondo, Yeukuang Hwu, Maria Pia Morigi, Fauzia Albertin
'Fauzia Albertin'] The high longitudinal and lateral coherence of synchrotron X-rays sources radically transformed radiography. Before them, the image contrast was almost only based on absorption. Coherent synchrotron sources transformed radiography into a multi-faceted tool that can extract information also from…
Peter T. Brown, Rory Kruithoff, Gregory J. Seedorf, Douglas P. Shepherd
Structured illumination microscopy (SIM) is a broadly applicable super-resolution microscopy technique which does not impose photophysics requirements on fluorescent samples. Multicolor SIM implementations typically rely on liquid crystal on silicon (LCoS) spatial light modulators (SLM’s) for precise patterning of the…
Mario Lachetta, Hauke Sandmeyer, Alice Sandmeyer, Jan Schulte am Esch + 2 more
Digital micromirror devices (DMDs) are spatial light modulators that employ the electro-mechanical movement of miniaturized mirrors to steer and thus modulate the light reflected of a mirror array. Their wide availability, low cost and high speed make them a popular choice both in consumer electronics such as video…
Klaus D. Mielenz
This paper attempts to reconcile conflicting points of view of laboratory physicists and coherence theorists on correlation-induced spectral changes arising from the partial coherence of primary and secondary light sources. It is shown that, under normal laboratory conditions and in the Fraunhofer approximation, the…
T. Latychevskaia, G. F. Mancini, F. Carbone
The investigation of the static and dynamic structural properties of colloidal systems relies on techniques capable of atomic resolution in real space and femtosecond resolution in time. Recently, the cross-correlation function (CCF) analysis of both X-rays and electron diffraction patterns from dilute and dense…
Andrej Singer, Ivan A. Vartanyants
An analytical approach describing properties of focused partially coherent X-ray beams is presented.
Alice Sandmeyer, Mario Lachetta, Hauke Sandmeyer, Wolfgang Hübner + 2 more
Structured illumination microscopy (SIM) is among the most widely used super-resolution fluorescence microscopy techniques for visualizing the dynamics of cellular organelles, such as mitochondria, the endoplasmic reticulum, or the cytoskeleton. In its most wide-spread implementation, SIM relies on the creation of an…
Kevin T. Crampton, Alan G. Joly, Long D. Nguyen, Saleem Iqbal + 2 more
Coherent structured illumination microscopy (c-SIM) is a synthetic aperture optical technique for sub-diffraction limit imaging that extends the utility of traditional SIM to non-fluorescent samples. Here, we present a complementary 5-beam implementation of c-SIM that provides enhanced optical sectioning compared to…
C. F. Majkrzak, N. F. Berk, Brian B. Maranville, Joseph A. Dura + 1 more
'Terrence Jach'] In the analysis of neutron scattering measurements of condensed matter structure, it normally suffices to treat the incident and scattered neutron beams as if composed of incoherent distributions of plane waves with wavevectors of different magnitudes and directions which are taken to define an…
Kaige Wang
From common knowledge, the occurrence of optical interference requires a coherent light source. The original meaning of coherence was attributed to the ability of light to exhibit interference phenomena. There are two types of coherence: temporal coherence and spatial coherence. For spatial interference to occur…
António J. Pereira, Mafalda Sousa, Ana C. Almeida, Luísa T. Ferreira + 7 more
Resolution in microscopy is not limited by diffraction as long as a nonlinear sample response is exploited. In a paradigmatic example, stimulated-emission depletion (STED) fluorescence microscopy fundamentally ‘breaks’ the diffraction limit by using a structured optical pattern to saturate depletion on a previously…
H. Esat Kondakci, Andre Beckus, Ahmed El Halawany, Nafiseh Mohammadian + 2 more
'Nafiseh Mohammadian' 'George K. Atia' 'Ayman F. Abouraddy'] In absence of a lens to form an image, incoherent or partially coherent light scattering off an obstructive or reflective object forms a broad intensity distribution in the far field with only feeble spatial features. We show here that measuring the complex…
Ronen Chriki, Slava Smartsev, Д. Егер, Ofer Firstenberg + 1 more
'Nir Davidson'] Partially coherent light is abundant in many physical systems, and its propagation properties are well understood. Here we extend current theory of propagation of partially coherent light beams to the field of coherent diffusion. Based on a unique four-wave mixing scheme of electro-magnetically induced…
Jayachandra Bingi, Vadakke Matham Murukeshan
Laser speckles and speckle patterns, which are formed by the random interference of scattered waves from optically rough surfaces, have found tremendous applications in a wide range of metrological and biomedical fields. Here, we demonstrate a novel edge diffraction phenomenon of individual speckle for the fabrication…
Roland Donatiello, Mustaqim Siddi Que Iskhandar, Md Kamrul Hasan, Philipp Kästner + 7 more
'Philipp Kästner' 'Muhammad Hasnain Qasim' 'Jiahao Chen' 'Shilby Baby' 'Basma Elsaka' 'Guilin Xu' 'Hartmut Hillmer' 'Qifa Zhou'] An innovative glass substrate surface technology including integrated micro-electro-mechanical systems (MEMS) is presented as an advanced light modulation, heat control, and energy management…
Martin Fally
and consequences Authors: ['Martin Fally'] Based on the seminal work by John T. Sheridan [1] we discuss the usefulness and validity of simple diffraction theories frequently used to determine and characterize optical holographic gratings. Experimental investigations obtained in recent years highlight the correctness of…
Denis Tikhonov
Here, we present a new approach for obtaining radial distribution functions (RDF) from the electron diffraction data using a regularized weighted sine least-squares spectral analysis (rwsLSSA). It allows for explicitly transferring the measured experimental uncertainties in the reduced molecular scattering function to…
Roberto Piazza
This review aims to provide a simple introduction to the application of optical correlation methods in colloidal science. In particular, I plan to show that full appraisal of the intimate relation between light scattering and microscopy allows designing novel powerful investigation techniques that combine their powers.…
Niko Vlahakis, Songrong Qu, Logan Richards, Lygia Silva deMoraes + 3 more
Electron counting helped realize the resolution revolution in single particle cryoEM and is now accelerating the determination of MicroED/3DED structures. Its advantages are best demonstrated by new direct electron detectors capable of fast (kilohertz) event-based electron counting (EBEC). This strategy minimizes the…
Niko Vlahakis, Arden Clauss, Jose Rodriguez
High-energy electrons induce sample damage and motion at the nanoscale to fundamentally limit determination of molecular structures by electron diffraction. Using fast event-based electron counting (EBEC) detectors, we characterize electron beam-induced crystal lattice reorientations (BIR) that appear to broadly affect…
Sarthak Patnaik
We know that the diffusion is defined as the movement of molecules under a potential gradient. It is characterized by the diffusion coefficient. Diffusion coefficient determination can be done via various techniques, but in this paper, we have had a broad look at interferometry based optical methods for diffusion…
Ashley Fidler, Yen-Cheng Lin, James Gaynor, William McCurdy + 3 more
Nonlinear spectroscopies can disentangle spectra that are congested due to inhomogeneous broadening. In conjunction with theoretical calculations, attosecond extreme ultraviolet (XUV) four-wave mixing (FWM) spectroscopy is utilized here to probe the dynamics of autoionizing, inner valence excited Rydberg states of the…