25 papers · ranked by Valyu relevance
István Bányász, István Rajta, Vladimír Havránek, María Cinta Pujol + 3 more
Quasi-Sinusoidal Surface Relief Optical Transmission Gratings in Pyrex and IOG Glasses by Implantation with Oxygen and Nitrogen Ion Microbeams of the 5–6 MeV Energy Range Authors: ['István Bányász' 'István Rajta' 'Vladimír Havránek' 'María Cinta Pujol' 'Gábor Bazsó' 'György Kármán' 'Gyula Nagy'] A method for the…
J. Reinhold, M. Schulze, E.‐B. Kley, Andreas Tünnermann
We present a type of grism, a series combination of transmission grating and prism, in which we reduce the number of diffraction orders and achieve a configuration with very high angular dispersion. The grism can be fabricated from a single dielectric material and requires no metallic or dielectric film layers for high…
Saifollah Rasouli, Ali Mohammad Khazaei
Diffraction gratings are important optical components and are used in many areas of optics such as in spectroscopy. A diffraction grating is a periodic structure that splits and diffracts the impinging light beam into several beams travelling in different directions. The diffracted beams from a grating are commonly…
Francisco José Torcal-Milla, Luis Miguel Sanchez‐Brea
The main idea under the design is as simple as obligating the zero-th diffraction order to be null. Firstly, scalar approach is performed, showing an approximation to the parameters of the grating necessary to achieve beam-splitting. After that, a more rigorous approach such as Rigorous Coupled Waves Analysis (TE and…
Duy Thanh Cu, Tien Dat Pham, Vu Tuan Hung Le, Meng Chi Li + 4 more
'Hung Pin Chen' 'Chien Cheng Kuo' 'Konstantins Jefimovs' 'Jin-Cherng Hsu'] Diffraction gratings are becoming increasingly widespread in optical applications, notably in lasers. This study presents the work on the characterization and evaluation of Multilayer Dielectric Diffraction Gratings (MDG) based on the finite…
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…
Bassam Hajj, Laura Oudjedi, Jean-Bernard Fiche, Maxime Dahan + 1 more
'Marcelo Nollmann'] Multifocus microscopy (MFM) allows sensitive and fast three-dimensional imaging. It relies on the efficient design of diffraction phase gratings yielding homogeneous intensities in desired diffraction orders. Such performances are however guaranteed only for a specific wavelength. Here, we discuss a…
Micheal McLamb, Yanzeng Li, Serang Park, Marc Lata + 1 more
—A theoretical approach for uniformly extracting light propagating through a light guide plate is developed here. Typically, liquid crystal display modalities utilize a backlit lighting system illuminated from the edge with light emitting diodes. The backlight acts as a light guide plate and is coupled with a diffuser…
Georg Heuberger, Jürgen Klepp, Jinxin Guo, Yasuo Tomita + 1 more
'Martin Fally'] We experimentally characterize the positions of the diffraction maxima of a phase grating on a screen, for laser light at oblique incidence (so-called off-plane diffraction or conical diffraction). We discuss the general case of off-plane diffraction geometries and derive basic equations for the…
Kokou B. Dossou
We consider the spectral response of moving diffraction gratings, in which the incident light extends over a broad angular range and where the diffracted light is observed from a specific angle. We show that the dispersion relation between the frequency perceived by an observer who is looking at a moving grating and…
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…
Wenjun Shao, Minzi Chang, Kevin Emmerich, Patrick O Kanold + 2 more
Fundamental understanding of large-scale dynamic connectivity within a living organism requires volumetric imaging over a large field of view (FOV) at biologically relevant speed and resolution. However, most microscopy methods make trade-offs between FOV and depth resolution, making it challenging to observe highly…
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…
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…
Masakazu Iwasaka
Light projection over short distances can minimize the size of photonic devices, e.g., head-mounted displays and lens-free microscopes. Small lenses or light condensers without typical lenses are essential for light control in micron-scale spaces. In this work, micro-platelets floating in water are used for light…
Masakazu Iwasaka
Microscopic observation system without lens has a potential to realize ubiquitous sensing network detecting micro/nano biological hazards to modern society because the lens-free imaging device can provide an extremely compact microscope. In addition to in slico micro-mirrors, liquid injectable organic micro-mirrors…
Aimee Sheehan, Tatsiana Mikulchyk, Catherine De Castro, Safakath Karuthedath + 7 more
A series of new heavy-atom-free photosensitizers using 2,6-diethoxycarbonyl-BODIPY was designed and synthesized. Photoinduced electron transfer between the BODIPY and meso-aryl subunits followed by the formation of BODIPY triplet excited states via spin-orbit charge transfer intersystem crossing (SOCT-ISC) was studied…
Ke Chen, Xianghai Meng, Feng He, Yongjian Zhou + 3 more
'Nathanial Sheehan' 'Seth R. Bank'] Optical grating technique, where optical gratings are generated via light inference, has been widely used to measure charge carrier and phonon transport in semiconductors. In this paper, compared are three types of transient optical grating techniques: transient grating diffraction…
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…
Authors not listed
Layered crystal structures are commonly found across organic and inorganic material systems. When in-plane atomic arrangement remains (nearly) identical, a stacking variation of these layers may result in twinning, planar disorder, or polytypes, a form of polymorphism derived from altering stacking sequences. In this…
Kejian Qu, Hrishikesh Bale, Zachary Riedel, Junehu Park + 3 more
Single crystals of rhombohedral KBiS2 were synthesized for the first time, and the structure, growth habit and properties of this layered semiconductor are presented. The single crystals form from a reactive K2S5 salt flux and are still embedded in the residual flux, without removal from the reaction vessel throughout…
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…
Anderson Alves Tomaz, Rafael Souza Mattos, Mario Barbatti
The Diósi-Penrose model states that the wave-function collapse ending a quantum superposition occurs due to the instability of coexisting gravitational potentials created by distinct geometric conformations of the system in different states. The Heisenberg time-energy principle can be invoked to estimate the collapse…