Results 101 to 110 of about 1,347 (193)

Focused ion beam fabrication procedures of x-ray micro Fresnel zone plates [PDF]

, 2007
In this paper the use of focused ion beam (FIB) mask-less lithography is presented as a novel and simple way to fabricate x-ray Fresnel zone plates (FZPs), and a prototype of a FIB-made 100 nm resolution FZP with 38 zones is described. Considerations for
Surpi, Alessandro,, Lagomarsino, Stefano,, Valizadeh, Sima,, Leifer, Klaus,   +3 more
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Nonlinear fresnel zone plate reflector [PDF]

2016 IEEE International Symposium on Antennas and Propagation (APSURSI), 2016
This paper describes a nonlinear Fresnel zone plate reflector designed to operate at 2.8GHz. The alternating Fresnel zones of the reflector are made from two different nonlinear metamaterials: one that reflects like a short circuit at low incident power levels and another that reflects like an open circuit.
openaire   +2 more sources

On the use of phase correction rings on Fresnel zone plates with ultrasound piston emitters [PDF]

, 2018
[EN] In this work, the distortion of the Fresnel Zone Plate focusing profile generated by a piston emitter in ultrasound applications is significantly reduced through the use of phase correction rings, which compensate the effect of the piston emitter ...
Pilar Candelas, Constanza Rubio, Rubio Michavila, Constanza, Belmar Ibáñez, Francisco, Sergio Pérez-López, José Miguel Fuster, Candelas Valiente, Pilar, Francisco Belmar, Fuster Escuder, José Miguel   +8 more
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Fabrication of Fresnel Zone Plates for Soft X-Ray and EUV Microscopy by Ion Beam Lithography [PDF]

, 2014
Fresnel zone plates are used as lenses for microscopes in the extreme ultraviolet (EUV) and the soft X-ray (SXR) parts of the electromagnetic spectrum.
Overbuschmann, Johannes
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Microfabrication of Fresnel zone plates by laser induced solid ablation [PDF]

, 2016
A novel and simple single-step method of inscribing optical elements on metal-coated transparent substrates is demonstrated. Laser induced solid ablation (LISA) demands very low laser energies (nJ), as can be amply provided by a femtosecond laser ...
Santhosh, Chidangil, Ramachandran, Hema, Rodrigues, Vanessa R M, Thomas, John, Mathur, Deepak   +4 more
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An ellipsoidal mirror for focusing neutral atomic and molecular beams [PDF]

, 2010
Manipulation of atomic and molecular beams is essential to atom optics applications including atom lasers, atom lithography, atom interferometry and neutral atom microscopy.
Galas, J., Sondergard, E., Reisinger, T., Miranda, R., Fladischer, K., Farias, D., Ernst, W.E., Piatkowski, B., Mayrhofer, V., Surma, B., Miros, A., Holst, B., Reingruber, H., Allison, W., Sitarek, S., Allison,, W., Nieto, P., Ross, A.E., Barredo, D., MacLaren, D.A., Litwin, D.   +20 more
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Direct laser writing of volume fresnel zone plates in silicon [PDF]

, 2015
Date of Conference: 21–25 June 2015Conference Name: 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics ConferenceFunctional optical elements fabricated on silicon (Si) constitute fundamental building blocks of Si ...
İlday, F. Ömer, Tokel, Onur, Pavlov, Ihor, Turnalı, Ahmet   +3 more
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Nanometer focusing properties of Fresnel zone plates described by dynamical diffraction theory [PDF]

The x-ray focusing properties of linear Fresnel zone plates have been derived by solving the Helmholtz equation for the field propagating through the zones. We consider the imaging of a point object into the first diffraction order of a volume zone plate
David, C., Pfeiffer, F., Bergemann, C., van der Veen, J. F.   +3 more
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Novel Focusing Performances of High-Numerical-Aperture Micro-Fresnel Zone Plates with Selective Occlusion

Photonics
In this study, novel focusing performances of high-numerical-aperture (NA) micro-Fresnel zone plates (FZPs) with selective occlusion are identified and investigated through numerical calculations based on vectorial angular spectrum (VAS) theory, and ...
Qiang Liu, Yunpeng Wu, Yuanhao Deng, Junli Wang, Wenshuai Liu, Xiaomin Yao   +5 more
doaj   +1 more source

The partial achromatization of zone plates through holographic techniques [PDF]

, 2017
Thesis (M.S.)--University of Rochester. College of Engineering and Applied Science. Institute of Optics, 1967.An experimental technique is presented for the production and evaluation of partially achromatized Fresnel zone plates.
Givens, Miles Parker, Snow, Kenneth Albert   +1 more
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