Journal ArticleDOI
Design of multifunctional diffractive optical elements
TLDR
In this paper, a comparison of the beam generated by different beam generation and focused ion beam milling methods is presented. And in order to be able to compare methods, specific functions of ring generation and focusing have been added in all cases.Abstract:
Diffractive optics has traditionally been used to transform a parallel beam of light into a pattern with a desired phase and intensity distribution. One of the advantages of using diffractive optics is the fact that multiple functions can be integrated into one element. Although, in theory, several functions can be combined, the efficiency is reduced with each added function. Also, depending on the nature of each function, feature sizes could get finer. Optical lithography with its 1 μm limit becomes inadequate for fabrication and sophisticated tools such as e-beam lithography and focused ion beam milling are required. Two different techniques, namely, a modulo-2π phase addition technique and an analog technique for design and fabrication of composite elements are studied. A comparison of the beams generated in both cases is presented. In order to be able to compare methods, specific functions of ring generation and focusing have been added in all cases.read more
Citations
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Journal ArticleDOI
Experimental demonstration of square Fresnel zone plate with chiral side lobes.
TL;DR: The CSFZP beam pattern was implemented in an optical trapping experiment and was found to possess particle trapping capabilities, with a strong central focal spot and twisted side lobes.
Journal ArticleDOI
Generation of generalized spiraling Bessel beams of arbitrary order by curved fork-shaped holograms
TL;DR: In this article, generalized spiraling Bessel beams (GSBB) of arbitrary order are created by illuminating a curved fork-shaped hologram (CFH) by Laguerre-Gaussian beam (LGB).
Journal ArticleDOI
White light three-dimensional imaging using a quasi-random lens.
TL;DR: In this paper, a denoising deep learning neural network (DLNN) was trained using synthetic noisy images generated by the convolution of recorded point spread functions with the virtual object functions under a wide range of aberrations and noises.
Journal ArticleDOI
Compact generation of superposed higher-order Bessel beams via composite diffractive optical elements
TL;DR: In this article, a binary composite diffractive optical element with the functions of a spiral phase plate (SPP), an axicon, and a Fresnel zone lens (FZL) were designed with different topological charges.
Journal ArticleDOI
All femtosecond optical pump and x-ray probe: holey-axicon for free electron lasers
Vijayakumar Anand,Jovan Maksimovic,Tomas Katkus,Soon Hock Ng,Orestas Ulčinas,Mindaugas Mikutis,Justas Baltrukonis,Antanas Urbas,Gintas Šlekys,H. Ogura,Daisuke Sagae,Tatiana Pikuz,Toshihiro Somekawa,Norimasa Ozaki,Arturas Vailionis,Gediminas Seniutinas,Vygantas Mizeikis,Karl Glazebrook,Jean P. Brodie,Paul R. Stoddart,Ludovic Rapp,Andrei Rode,Eugene G Gamaly,Saulius Juodkazis +23 more
TL;DR: In this paper, a co-axial pump (optical)-probe (x-rays) experimental concept and show performance of the optical component are presented and different realisations of optical pump are discussed.
References
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Journal ArticleDOI
Generation of optical phase singularities by computer-generated holograms.
TL;DR: Laser beams that contain phase singularities can be generated with computer-generated holograms, which in the simplest case have the form of spiral Fresnel zone plates.
Journal ArticleDOI
Clinical outcomes and intraocular optical quality of a diffractive multifocal intraocular lens with asymmetrical light distribution.
TL;DR: The Acri.Lisa 366D diffractive multifocal IOL gave good efficacy, predictability, and safety and excellent visual acuity at distance and near and an intraocular optical performance model showed good intraocular aberration, Strehl ratio, and MTF values.
Journal ArticleDOI
Multiscale, multifunction diffractive structures wet etched into fused silica for high-laser damage threshold applications
TL;DR: Model simulations of isotropic etching of topographical features show good agreement with the measured shape evolution of the sampling grating profiles, and the simulations reveal the sensitivity of the final feature shape to its initial aspect ratio.
Journal ArticleDOI
Multifunctional double-layered diffractive optical element
TL;DR: A novel multifunctional double-layered diffractive optical element based on the fractional Talbot effect that can perform each of the multiple optical functions one by one by shifting the encoding layer.