Results 11 to 20 of about 8,681 (211)

Diffractive lenses for neutron techniques [PDF]

Scientific Reports
Many neutron techniques can greatly benefit from enhanced neutron lenses for focusing and imaging. In this work, we revisit the potential of diffractive optics for neutron beams, building on advanced high-resolution nano-lithography techniques developed ...
Mano raj Dhanalakshmi Veeraraj, Di Qu, Shuai Zhao, Peng Qi, Konstantins Jefimovs, Matteo Busi, Joachim Kohlbrecher, Christian David, Markus Strobl, Joan Vila-Comamala   +9 more
doaj   +2 more sources

Enhanced Terahertz Sensing via On-Chip Integration of Diffractive Optics with InGaAs Bow-Tie Detectors [PDF]

Sensors
The practical implementation of terahertz (THz) imaging and spectroscopic systems in real operational conditions requires them to be of a compact size, to have enhanced functionality, and to be user-friendly.
Karolis Redeckas, Vytautas Jakštas, Matas Bernatonis, Vincas Tamošiūnas, Gintaras Valušis, Linas Minkevičius   +5 more
doaj   +2 more sources

Tunable hard x-ray nanofocusing with Fresnel zone plates fabricated using deep etching. [PDF]

Optica, 2020
Li K, Ali S, Wojcik M, De Andrade V, Huang X, Yan H, Chu YS, Nazaretski E, Pattammattel A, Jacobsen C.   +9 more
europepmc   +2 more sources

Optical elements for the extreme ultraviolet and soft X-ray range [PDF]

Biuletyn Wojskowej Akademii Technicznej, 2022
The article presents the physical basis and overview of optical elements for the rangeincluding extreme ultraviolet (EUV) and soft X-ray (SXR). The first chapter contains an introductionto the subject under review and physical fundamentals.
Martyna Wardzińska, Przemysław Wachulak   +1 more
doaj   +1 more source

3D Nanofabrication of High-Resolution Multilayer Fresnel Zone Plates. [PDF]

Adv Sci (Weinh), 2018
Sanli UT, Jiao C, Baluktsian M, Grévent C, Hahn K, Wang Y, Srot V, Richter G, Bykova I, Weigand M, Schütz G, Keskinbora K.   +11 more
europepmc   +2 more sources

Investigation of an Active Focusing Planar Piezoelectric Ultrasonic Transducer [PDF]

Sensors
Ultrasonic focusing transducers have broad prospects in advanced ultrasonic non-destructive testing fields. However, conventional focusing methods that use acoustic concave lenses can disrupt the acoustic impedance matching condition, thereby adversely ...
Qiao Wu, Bin You, Xu Zhang, Jun Tu
doaj   +2 more sources

High-efficiency focusing and imaging by dielectric kinoform zone plate lenses with soft X-rays

Journal of Synchrotron Radiation, 2023
With fast advances in enhancing the focusing/imaging resolution of Fresnel zone plate lenses toward sub-10 nm, low diffraction efficiency in connection with their rectangular zone shape still remains a big issue in both soft and hard X-ray microscopy. In
Xujie Tong, Yifang Chen, Zijian Xu, Yijie Li, Zhenjiang Xing, Chengyang Mu, Jun Zhao, Xiangjun Zhen, Chengwen Mao, Renzhong Tai   +9 more
doaj   +1 more source

Investigation of Beam Width Shaping of a Ku-band Horn Antenna using a Diffractive Optic Element and an Electromagnetic Wave Absorber

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020
The feasibility of beam-shaping of a Ku-Band horn as a transmitting (Tx) antenna by mounting two different versions of lenses which are kind of Fresnel Zone Plates (FZP) is studied.
Ahmet Teber
doaj   +1 more source

An Annular Fresnel Zone Plate without Central Spots Fabricated by Femtosecond Laser Direct Writing

Micromachines, 2022
In recent years, micro-annular beams have been widely used, which has expanded the possibilities for laser processing. However, the current method of generating an annular beam still has shortcomings, such as spot energy at the center of the produced ...
Xiaoyan Sun, Fang Zhou, Lian Duan
doaj   +1 more source

On the Design of Soret Zone Plates Based on Binary Sequences Using Directional Transducers

Sensors, 2021
In this work, we analyze the effect of the distribution of transparent Fresnel regions over the focusing profile of Soret Zone Plates (SZP) based on binary sequences. It is shown that this effect becomes very significant in those fields where directional
Pilar Candelas, Sergio Pérez-López, José Miguel Fuster   +2 more
doaj   +1 more source