Journal ArticleDOI
Quasi-achromatic Fresnel zone lens with ring focus.
TLDR
Experimental results confirm the generation of a wavelength-independent ring pattern at the focus of the rf-FZL, which is found to be quasi-achromatic, in that the diameter is wavelength independent but its location is not.Abstract:
The phase of a standard Fresnel zone lens (FZL) is periodically modulated in the radial direction using the phase of a binary fraxicon. The resulting element (rf-FZL) focuses light into a ring. The ring is found to be quasi-achromatic, in that the diameter is wavelength independent but its location is not. The binary rf-FZL is fabricated using electron beam direct writing. Experimental results confirm the generation of a wavelength-independent ring pattern at the focus of the rf-FZL. An efficiency of 24% was obtained. The variation in radius of ring pattern was reduced from 61 μm to less than 10 nm for a corresponding wavelength variation from 532 to 633 nm.read more
Citations
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Proceedings ArticleDOI
Conical Fresnel zone lens for optical trapping
Anand Vijayakumar,Praveen Parthasarathi,Shruthi S. Iyengar,Rekha Selvan,Sharath Ananthamurthy,Shanti Bhattacharya,Sarbari Bhattacharya +6 more
TL;DR: In this article, the phase of a negative axicon is combined with that of a Fresnel zone lens (FZL) to obtain an element labelled as conical FZL, which can generate a focused ring pattern at the focal plane of the lens.
Journal ArticleDOI
Binary square axicon with chiral focusing properties for optical trapping
B. Vinoth,Anand Vijayakumar,Anand Vijayakumar,Mani Ratnam Rai,Joseph Rosen,Chau Jern Cheng,Oleg V. Minin,Oleg V. Minin,Igor V. Minin,Igor V. Minin +9 more
TL;DR: In this paper, a phase-only diffractive optical element called chiral binary square axicon (CBSA) is introduced, which is designed by linearly rotating the square half-period zones of the binary squares axicon with respect to one another.
Proceedings ArticleDOI
Design, fabrication, and evaluation of diffractive optical elements for generation of focused ring patterns
TL;DR: In this paper, a toric Fresnel zone lens and composite elements were fabricated using electron beam direct writing for the generation of focused ring patterns, with the toric lens out-performing the other elements in several areas such as efficiency, focal depth, and ring thickness.
Posted Content
All femtosecond optical pump and X-ray probe: holey-axicon for free electron laser
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. But the performance of optical pump is limited to the case of femtosecond X-ray free electron laser (FEL).
Posted ContentDOI
All Femtosecond Optical Pump and X-Ray Probe: Holey-Axicon for Free Electron Laser
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. But the performance of optical pump is limited to the case of femtosecond X-ray free electron laser (FEL).
References
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Journal ArticleDOI
The Phase Fresnel Lens
TL;DR: In this paper, a phase Fresnel lens is inserted in the pupil of the optical system to deform the wave surface passing through an optical system by the amount ϕ(u,v).
Journal ArticleDOI
Ring pattern of a lens-axicon doublet illuminated by a Gaussian beam
Pierre-Andre Belanger,Marc Rioux +1 more
TL;DR: The purpose of this paper is to show that when a lens-axicon combination is illuminated by a Gaussian beam, the transverse distribution of the focal ring is also aGaussian distribution.
Journal ArticleDOI
Diffraction Patterns and Zone Plates Produced by Thin Linear Axicons
TL;DR: In this paper, the Fraunhofer and Fresnel diffraction patterns produced by a thin linear axicon when it is illuminated by a plane wavefront were determined, and an interferometric method of recording zone plates using linear axicons was presented.