Rigorous electromagnetic analysis of a microcylindrical axilens with long focal depth and high transverse resolution

Bi Zhen Dong; Juan Liu; Ben Yuan Gu; Guo Zhen Yang; Jian Wang

doi:10.1364/JOSAA.18.001465

Rigorous electromagnetic analysis of a microcylindrical axilens with long focal depth and high transverse resolution

Bi Zhen Dong^*, Juan Liu, Ben Yuan Gu, Guo Zhen Yang, Jian Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

We first present nonparaxial designs for a microcylindrical axilens with different long focal depths and rigorously analyze electromagnetic field distributions of the axilens using integral equations and the boundary-element method. Numerical results show that the designed axilenses indeed have the special feature of attaining a long focal depth while keeping high transverse resolution for numerical apertures of 2.4, 2.0, and 1.0. The ratio between the extended focal depth of the designed axilens and the focal depth of the conventional focal lens is 1.41, the corresponding maximal extended focal depth of the axilens can reach 28 μm, and the spot size of the focal beam is ~10 μm over the focal range.

Original language	English
Pages (from-to)	1465-1470
Number of pages	6
Journal	Journal of the Optical Society of America A: Optics and Image Science, and Vision
Volume	18
Issue number	7
DOIs	https://doi.org/10.1364/JOSAA.18.001465
Publication status	Published - Jul 2001
Externally published	Yes

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title = "Rigorous electromagnetic analysis of a microcylindrical axilens with long focal depth and high transverse resolution",

abstract = "We first present nonparaxial designs for a microcylindrical axilens with different long focal depths and rigorously analyze electromagnetic field distributions of the axilens using integral equations and the boundary-element method. Numerical results show that the designed axilenses indeed have the special feature of attaining a long focal depth while keeping high transverse resolution for numerical apertures of 2.4, 2.0, and 1.0. The ratio between the extended focal depth of the designed axilens and the focal depth of the conventional focal lens is 1.41, the corresponding maximal extended focal depth of the axilens can reach 28 μm, and the spot size of the focal beam is ~10 μm over the focal range.",

author = "Dong, {Bi Zhen} and Juan Liu and Gu, {Ben Yuan} and Yang, {Guo Zhen} and Jian Wang",

year = "2001",

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AU - Dong, Bi Zhen

AU - Liu, Juan

AU - Gu, Ben Yuan

AU - Yang, Guo Zhen

AU - Wang, Jian

PY - 2001/7

Y1 - 2001/7

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AB - We first present nonparaxial designs for a microcylindrical axilens with different long focal depths and rigorously analyze electromagnetic field distributions of the axilens using integral equations and the boundary-element method. Numerical results show that the designed axilenses indeed have the special feature of attaining a long focal depth while keeping high transverse resolution for numerical apertures of 2.4, 2.0, and 1.0. The ratio between the extended focal depth of the designed axilens and the focal depth of the conventional focal lens is 1.41, the corresponding maximal extended focal depth of the axilens can reach 28 μm, and the spot size of the focal beam is ~10 μm over the focal range.

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JF - Journal of the Optical Society of America A: Optics and Image Science, and Vision

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Rigorous electromagnetic analysis of a microcylindrical axilens with long focal depth and high transverse resolution

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