外文题目: Focusing properties of phase-only generalized Fibonacci photon sieves
作者: Ke, Jie; Zhang, Junyong
刊名: Opt. Commun.
年: 2016 卷: 368 页： 34--38
英文关键词:
Diffractive lenses; Generalized Fibonacci sequence; Photon sieve; Spiral phase; X-ray optics
FRESNEL ZONE PLATES; X-RAY MICROSCOPY; FAR-FIELD MODEL; DIFFRACTION THEORY; NEAR-FIELD; PINHOLES; APERTURE; GRATINGS; LENSES; ORDER
英文摘要:
We propose a new algorithm to extend the standard Fibonacci photon sieve to the phase-only generalized Fibonacci photon sieve (GFiPS) and find that the focusing properties of the phase-only GFiPS are only relevant to the characteristic roots of the recursion relation of the generalized Fibonacci sequences. By switching the transparent and opaque zones on the basis of the generalized Fibonacci sequences, we not only realize adjustable bifocal lengths, but also give their corresponding analytic expressions. Besides, we investigate a special phase-only GFiPS, a spiral-phase GFiPS, which can present twin vortices along the axial coordinate. Compared with the single focusing system, bifocal system can be exploited to enhance the processing speed, and offer a broad range of applications, such as direct laser writing, optical tweezers or atom trapping and paralleled fluorescence microscope. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1016/j.optcom.2016.01.075


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