Search · four archives
Search · four archives
26 papers · ranked by Valyu relevance
Francesco Aieta, Mikhail A. Kats, Patrice Genevet, Federico Capasso
The replacement of bulk refractive optical elements with diffractive planar components enables the miniaturization of optical systems. However, diffractive optics suffers from large chromatic aberrations due to the dispersion of the phase accumulated by light during propagation. We show that this limitation can be…
Agnieszka Siemion
Diffractive optical elements are well known for being not only flat but also lightweight, and are characterised by low attenuation. In different spectral ranges, they provide better efficiency than commonly used refractive lenses. An overview of the recently invented terahertz optical structures based on diffraction…
Yidi Zheng, Junfeng Du, Boping Lei, Jiang Bian + 3 more
'Bin Fan' 'Muhammad Ali Butt'] The increasing resolution requirements of imaging optical systems must be satisfied by expanding the aperture of the optical system according to Rayleigh’s criterion, and larger apertures of conventional refractive/reflective optics place a greater demand on manufacturing and…
Yengwoo Son, Seung Pil Bang, Choul Yong Park, Aldo Vagge + 1 more
As surgeries using multifocal intraocular lenses (IOLs) to correct both cataracts and presbyopia have become common, it has become essential for clinicians to understand their basic optical characteristics to select the optimal lens for their patients. However, there are relatively few review articles on optics that…
Xiaonan Zhao, Jingpei Hu, Yu Lin, Feng Xu + 4 more
'Linsen Chen' 'Chinhua Wang'] Diffractive optical elements suffer from large chromatic aberration due to the strong wavelength-dependent nature in diffraction phenomena, and therefore, diffractive elements can work only at a single designed wavelength, which significantly limits the applications of diffractive elements…
Liron Stern, Douglas G. Bopp, Susan Schima, Vincent Maurice + 1 more
'John Kitching'] Atomic systems have long provided a useful material platform with unique quantum properties. The efficient light-matter interaction in atomic vapors has led to numerous seminal scientific achievements including accurate and precise metrology1–3 and quantum devices4–7. In the last few decades, the field…
Joseph Greene, Yujia Xue, Jeffrey Alido, Alex Matlock + 4 more
Extended depth of field (EDoF) microscopy has emerged as a powerful solution to greatly increase the access into neuronal populations in table-top imaging platforms. Here, we present EDoF-Miniscope, which integrates an optimized thin and lightweight binary diffractive optical element (DOE) onto the gradient refractive…
Gianluca Ruffato, Michele Massari, Giuseppe Parisi, Filippo Romanato
1 Department of Physics and Astronomy 'G. Galilei' ,University of Padova, via Marzolo 8,35131 Padova, Italy 2 Laboratory for Nanofabrication of Nanodevices, c.so Stati Uniti 4, 35127 Padova, Italy 3 SM Optics – SIAE Group, Via M. Buonarroti 21, 20093 Cologno Monzese, Milano, Italy 4 CNR -INFM TASC IOM National…
Keith Bonin, Amanda Smelser, Naike Salvador Moreno, George Holzwarth + 3 more
We describe a simple optical method that creates structured illumination of a photoactivatable probe and apply this method to characterize chromatin motions in the nuclei of live cells. A laser beam coupled to a diffractive optical element at the back focal plane of an excitation objective generates an array of near…
Gianluca Ruffato, Marcello Girardi, Michele Massari, Erfan Mafakheri + 4 more
'Bereneice Sephton' 'Pietro Capaldo' 'Andrew Forbes' 'Filippo Romanato'] The design and fabrication of a compact diffractive optical element is presented for the sorting of beams carrying orbital angular momentum (OAM) of light. The sorter combines a conformal mapping transformation with an optical fan-out, performing…
Vijayakumar Anand, Jovan Maksimovic, Tomas Katkus, Soon Hock Ng + 20 more
'Orestas Ulčinas' 'Mindaugas Mikutis' 'Justas Baltrukonis' 'Antanas Urbas' 'G. Šlekys' 'Hideo Ogura' 'Daisuke Sagae' 'С. А. Пикуз' 'Toshihiro Somekawa' 'Norimasa Ozaki' 'Artūras Vailionis' 'Gediminas Seniutinas' 'V. Mizeikis' 'Karl Glazebrook' 'Jean P. Brodie' 'Paul R. Stoddart' 'Ludovic Rapp' 'Andrei V. Rode' 'Eugene…
Svetlana Nikolaevna Khonina, Nikolay Lvovich Kazanskiy, Sergey Vladimirovich Karpeev, Muhammad Ali Butt
'Sergey Vladimirovich Karpeev' 'Muhammad Ali Butt'] Diffraction is a phenomenon related to the wave nature of light and arises when a propagating wave comes across an obstacle. Consequently, the wave can be transformed in amplitude or phase and diffraction occurs. Those parts of the wavefront avoiding an obstacle form…
Gianluca Ruffato, Michele Massari, Filippo Romanato
The orbital angular momentum (OAM) of light has recently attracted a growing interest as a new degree of freedom in order to increase the information capacity of today's optical networks both for free-space and optical fiber transmission. Here we present our work of design, fabrication and optical characterization of…
Authors not listed
In the field of mid-infrared (m-IR) applications, there is a need to control thermal radiation from metal-insulator-metal (MIM) metasurfaces without any optical components. Here, we introduce the concept of metalens for the MIM metasurfaces. The finite difference time domain (FDTD) simulation was used to design the…
Gianluca Ruffato, Michele Massari, Filippo Romanato
We present a method to efficiently multiply or divide the orbital angular momentum (OAM) of light beams using a sequence of two optical elements. The key-element is represented by an optical transformation mapping the azimuthal phase gradient of the input OAM beam onto a circular sector. By combining multiple…
Alexander Goncharsky, Anton Goncharsky, Dmitry Melnik, Svyatoslav Durlevich
'Svyatoslav Durlevich'] This paper focuses on the development of flat diffractive optical elements (DOEs) for protecting banknotes, documents, plastic cards, and securities against counterfeiting. A DOE is a flat diffractive element whose microrelief, when illuminated by white light, forms a visual image consisting of…
Anna Archetti, Matteo Bruzzone, Giulia Tagliabue, Marco dal Maschio
Bessel Beams (BBs) and BB lattices are structured-light excitation profiles frequently applied in material processing, nonlinear spectroscopy and in many fluorescence microscopy methods such as Light Sheet Microscopy (LSM). In LSM, BBs and BB-lattices offer wider excitation profiles, higher acquisition rate, enhanced…
Ke Guo, Abderrahim Boualam, James D Manton, Christopher J Rowlands
We present a new interferometer concept called SWIFT, able to project arbitrary interference patterns constructed from small numbers of plane waves. SWIFT can control each plane wave’s orientation, intensity, polarization and phase using just a single galvanometric mirror. We demonstrate the application of SWIFT to…
Mostafa Aakhte, Ehsan A. Akhlaghi, H.-Arno J. Müller
An important aim of the development of selective plane illumination microscopy (SPIM) is to present a completely open and flexible microscope set-up for nonspecialist users. Here, we report Structured SPIM (SSPIM), which provides an open-source, user-friendly and compact toolbox for beam shaping that can generate…
Gianluca Ruffato, Etienne Brasselet, Michele Massari, Filippo Romanato
'Filippo Romanato'] We present and test the integration of a static orbital angular momentum mode multiplexer with a dynamical geometric-phase optical element enabling on-demand spin-controlled angular momentum multiplexing. A diffractive optics multiplexer fabricated with 3D high-resolution electron beam lithography…
Johannes W. Goessling, William P. Wardley, Martin Lopez Garcia
Natural photonic crystals can serve in mating strategies or as aposematism for animals, but they also exist in some photosynthetic organisms, with potential implications for their light regulation. Some of the most abundant microalgae, named diatoms, evolved a silicate exoskeleton, the frustule, perforated with ordered…
Ferry Anggoro Ardy Nugroho, Ping Bai, Iwan Darmadi, Gabriel W. Castellanos + 4 more
Plasmonic sensors rely on optical resonances in metal nanoparticles and are typically limited by their broad spectral features. This constraint is particularly taxing for optical H2 sensors, in which hydrogen is absorbed inside optically-lossy Pd nanoparticles and for which state-of-the-art detection limits are only at…
Ziareena Al-Mualem, Xiaobing Chen, Joseph Shirley, Cong Xu + 1 more
BoxCARS and pump-probe geometries are common implementations of two dimensional infrared (2D IR) spectroscopy. BoxCARS is background-free, generally offering greater signal to noise ratio, which enables measuring weak vibrational echo signals. Pulse shapers have been implemented in the pump probe geometry to accelerate…
Courtney Johnson, Min Guo, Magdalena C. Schneider, Yijun Su + 5 more
Fluorescence microscopy is an invaluable tool in biology, yet its performance is compromised when the wavefront of light is distorted due to optical imperfections or the refractile nature of the sample. Such optical aberrations can dramatically lower the information content of images by degrading image contrast…
Authors not listed
This paper introduces Optical Fiber Chemistry (OFC) as a fourth-generation catalytic paradigm, distinguished not by incremental improvements in catalyst materials but by a fundamental reconfiguration of the catalytic reaction platform. By employing optical fibers as active photonic control elements, OFC achieves gen-…
Authors not listed
The first part of this project addressed a fundamental gap in interpreting vibrational circular dichroism (VCD) spectra by bridging the Bouguer–Beer–Lambert approximation with quan-tum mechanical methods for determining absolute molecular configuration. A wave-optics-based approach was developed to extract both the…