24 papers · ranked by Valyu relevance
Jiafan Guan, Zhipeng Dong, Xianyue Deng, Yuzuru Takashima + 2 more
'Jonathan B. Hopkins' 'Robert M. Panas'] Phase light modulator (PLM) by MEMS mirror array operating in a piston-mode motion enables a high-speed diffractive beam steering in a random-access and flexible manner that makes a lidar system more intelligent and adaptive. Diffraction efficiency is determined by the range of…
Jean-Philippe Banon, Colette Turbil, Iryna Gozhyk, Ingve Simonsen
The optical characterization of dielectric periodic line-gratings for which the period of the grating is significantly larger than the probing wavelength is investigated experimentally, numerically, and analytically. The experimental diffraction efficiencies are analyzed in transmission with the help of a closed-form…
Ye Wang, Yongyi Chen, Li Qin, Lijun Wang + 1 more
Since surface relief transmission gratings have very strict requirements on operators and use environment, according to the semiconductor laser external cavity spectral beam combining system, this paper proposes a design scheme for a semiconductor laser array spectral beam combining system based on the grating-external…
István Bányász, Gyula Nagy, Vladimir Havránek, Maria Cinta Pujol + 8 more
'Ágnes Nagyné Szokol' 'György Kármán' 'Robert Magnusson' 'István Rajta' 'Marco Pisco' 'Ilaria Rea' 'Genni Testa' 'Anna Chiara De Luca'] High diffraction efficiency optical transmission gratings with quasi-sinusoidal and saw-tooth surface relief profiles were fabricated in Bi12GeO20, Er: LiNbO3 and Er: Fe: LiNbO3…
Zhexin Zhao, Yun‐Han Lee, Xiayu Feng, Michael J. Escuti + 2 more
'Barry Silverstein'] Abstract: Considerable efforts have been devoted into augmented reality (AR) displays to enable the immersive user experience in the wearable glasses form factor. Transparent waveguide combiners offer a compact solution to guide light from the microdisplay to the front of eyes while maintaining the…
Yannik M. Glauser, J. J. Erik Maris, Raphael Brechbühler, Juri G. Crimmann + 5 more
'Juri G. Crimmann' 'Vanessa Bayer da Rosa' 'D. Petter' 'Gabriel Nagamine' 'Nolan Lassaline' 'David J. Norris'] ABSTRACT. Diffractive surfaces shape optical wavefronts for applications in spectroscopy, highspeed communication, and imaging. The performance of these structures is primarily determined by how precisely they…
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…
Howe, Leslie, Rajapaksha, Tharindu D. + 16 more
The emergence of planar meta-lenses on flexible materials has profoundly impacted the long-standing perception of diffractive optics. Despite their advantages, these lenses still face challenges in design and fabrication to obtain high focusing efficiency and resolving power. A nanofabrication technique is demonstrated…
Xingang Dai, Yanjun Hu, Bowen Niu, Qun Dai + 6 more
Diffractive optical elements (DOEs) are specialized optical components that manipulate light through diffraction for various applications, including holography, spectroscopy, augmented reality (AR) and virtual reality (VR), and light detection and ranging (LiDAR). The performance of DOEs is highly determined by…
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…
Yitong Gu, Ning Wang, Haorui Shang, Fei Yu + 2 more
'Onofrio M. Maragò'] As a universal physical scheme, effective light couplings to waveguides favor numerous applications. However, the low coupling efficiency at wide angles prohibits this fundamental functionality and thus lowers the performance levels of photonic systems. As previously found, the transmission…
Steve P. Meisburger, Nozomi Ando
Diffuse scattering is a powerful technique to study disorder and dynamics of macromolecules at atomic resolution. Although diffuse scattering is always present in diffraction images from macromolecular crystals, the signal is weak compared with Bragg peaks and background, making it a challenge to visualize and measure…
Thomas A. Hensel, Jan O. Wirth, Stefan W. Hell
Discerning two or more identical and constantly scattering point sources using freely propagating waves is thought to be limited by diffraction. Here we show both theoretically and experimentally that by employing a diffraction minimum rather than a maximum for resolution, a given number of point scatterers can be…
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…
Alba M. Paniagua-Díaz, William L. Barnes, Jacopo Bertolotti
A perfectly collimated beam can be spread out by multiple scattering, creating a speckle pattern and increasing the ´etendue of the system. Standard optical systems conserve ´etendue, and thus are unable to reverse the process by transforming a speckle pattern into a collimated beam or, equivalently, into a sharp…
Johan Hattne, Max T. B. Clabbers, Michael W. Martynowycz, Tamir Gonen
The combination of high sensitivity and rapid readout makes it possible for electron-counting detectors to record cryogenic electron microscopy data faster and more accurately without increasing the exposure. This is especially useful for MicroED of macromolecular crystals where the strength of the diffracted signal at…
Shyamal Biswas, Rhitabrata Bhattacharyya, Saugata Bhattacharyya
We have analytically explored the Rayleigh-Sommerfeld scalar diffraction for oblique incidence. We have explicitly derived the Fraunhofer diffraction formulae for oblique incidence of plane scalar wave on various apertures, such as single-slit, circular aperture, and diffraction grating. Such derivations in the…
Sagar Chowdhury, Rituraj Rituraj, Srini Krishnamurthy, Vidya Praveen Bhallamudi
'Vidya Praveen Bhallamudi'] Abstract: Fluorescent atomic defects, especially in dielectric materials, such as diamond are quite promising for several emerging quantum applications. However, efficient light extraction, directional emission, and narrow spectral emission are key challenges. We have designed dielectric…
Reza Hekmati, John P. Hadden, Annie Mathew, Samuel G. Bishop + 2 more
Coupling light from a point source to a propagating mode is an important problem in nano-photonics and is essential for many applications in quantum optics. Circular “bullseye” cavities, consisting of concentric rings of alternating refractive index, are a promising technology that can achieve near-unity coupling into…
Shomik Verma, Daniel Farrell, Rachel Evans
Luminescent solar concentrators (LSCs) are a promising technology to help integrate solar cells into the built environment, as they are colorful, semi-transparent, and can collect diffuse light. While LSCs have traditionally been cuboidal, in recent years a variety of unconventional geometries have arisen, for example…
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…
Stephanie Tenney, Lauren Tan, Xuanheng Tan, Mikayla Sonnleitner + 6 more
Large area absorbers with localized defect emission are of interest for energy concentration via the antenna effect. Transfer between 2D and 0D quantum-confined structures is advantageous as it affords maximal lateral area antennas with continuously tunable emission. We report the quantum efficiency of energy transfer…
Stefan Diesing, Le Zhang, Eli Zysman-Colman, Ifor Samuel
Organic light-emitting diodes (OLEDs) are a revolutionary self-emitting display technology that has been successfully commercialized in mobile phones and TVs. The injected charges form both singlet and triplet excitons, and for high efficiency it is important to enable dark triplets to emit light. Currently materials…
Thomas D. Schneider
Unlike the Carnot heat engine efficiency published in 1824, an isothermal efficiency derived from thermodynamics and information theory can be applied to biological systems. The original approach by Pierce and Cutler in 1959 to derive the isothermal efficiency equation came from Shannon’s channel capacity of 1949 and…