Controlling near-field focusing of a mesoscale binary phase plate in an optical radiation field with circular polarization

被引:4
作者
Geints, Y. E. [1 ]
Minin, O., V [2 ,3 ]
Panina, E. K. [1 ]
Minin, I., V [2 ,3 ]
机构
[1] VE Zuev Inst Atmospher Opt SB RAS, Academician Zuev Sq 1, Tomsk 634055, Russia
[2] Siberian State Univ Geosyst & Technol, Plakhotny 10, Novosibirsk 630108, Russia
[3] Tomsk Polytech Univ, Lenina 30, Tomsk 634050, Russia
关键词
Fresnel zone plates; near-field focusing; subdiffraction focusing; ZONE-PLATE; DIFFRACTION;
D O I
10.18287/2412-6179-CO-878
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Binary Fresnel zone plates (ZP) are one of the most frequently used focusing elements of in-plane optical schemes in micro- and nanophotonics. With a decrease in the diameter and focal distance of the ZP to meso-wavelength sizes, the parameters of the focusing region begin to be significantly influenced by features of the ZP design (material, thickness, relief depth). The spatial structure of the focal spot formed in the near-field is investigated by the numerical finite elements (FEM) simulations of the transmission of a plane optical wave through a mesoscale binary phase ZP. We show that there is a range of optimal etching depths of the ZP ridges and optimal thicknesses of the plate substrate, at which the best focusing of the incident optical wave is realized in terms of the maximum field intensity and the minimum size of the focal spot. In addition, a concept of a super-focusing binary phase ZP with an immersion layer in the form of a truncated cone fabricated of ZP material is proposed, which makes it possible to focus the circularly polarized light wave into a subdiffraction region with a half-width of about lambda/2n (n is the ZP refractive index).
引用
收藏
页码:512 / +
页数:11
相关论文
共 46 条
[1]   FRESNEL ZONE PLATE IMAGING OF GAMMA-RAYS - THEORY [J].
BARRETT, HH ;
HORRIGAN, FA .
APPLIED OPTICS, 1973, 12 (11) :2686-2702
[2]   EVANESCENT AND REAL WAVES IN QUANTUM BILLIARDS AND GAUSSIAN BEAMS [J].
BERRY, MV .
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1994, 27 (11) :L391-L398
[3]  
Born M., 1959, PRINCIPLES OPTICS EL
[4]   From Far-Field to Near-Field Micro- and Nanoparticle Optical Trapping [J].
Bouloumis, Theodoros D. ;
Chormaic, Sile Nic .
APPLIED SCIENCES-BASEL, 2020, 10 (04)
[5]   Diffraction-based solid immersion lens [J].
Brunner, R ;
Burkhardt, M ;
Pesch, A ;
Sandfuchs, O ;
Ferstl, M ;
Hohng, S ;
White, JO .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 2004, 21 (07) :1186-1191
[6]   Superoscillation: from physics to optical applications [J].
Chen, Gang ;
Wen, Zhong-Quan ;
Qiu, Cheng-Wei .
LIGHT-SCIENCE & APPLICATIONS, 2019, 8 (1)
[7]   Flat optics with dispersion-engineered metasurfaces [J].
Chen, Wei Ting ;
Zhu, Alexander Y. ;
Capasso, Federico .
NATURE REVIEWS MATERIALS, 2020, 5 (08) :604-620
[8]   The focus of light-linear polarization breaks the rotational symmetry of the focal spot [J].
Dorn, R ;
Quabis, S ;
Leuchs, G .
JOURNAL OF MODERN OPTICS, 2003, 50 (12) :1917-1926
[9]   Sharper focus for a radially polarized light beam [J].
Dorn, R ;
Quabis, S ;
Leuchs, G .
PHYSICAL REVIEW LETTERS, 2003, 91 (23)
[10]   Plasmonic microzone plate: Superfocusing at visible regime [J].
Fu, Yongqi ;
Zhou, W. ;
Lim, L. E. N. ;
Du, C. L. ;
Luo, X. G. .
APPLIED PHYSICS LETTERS, 2007, 91 (06)