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논문 기본 정보

자료유형
학술저널
저자정보
Lingyu Wang (University of Shanghai for Science and Technology) Yu Miao (University of Shanghai for Science and Technology) Mingzhu Xu (University of Shanghai for Science and Technology) Xiumin Gao (University of Shanghai for Science and Technology)
저널정보
한국광학회 Current Optics and Photonics Current Optics and Photonics Vol.7 No.2
발행연도
2023.4
수록면
127 - 135 (9page)

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초록· 키워드

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Radially polarized beams with the ability to generate a sub-wavelength sized spot in a longitudinal field provides significant applications in microscopic imaging, optical tweezers, lithography and so on. However, this excellent property can also be achieved based on conventional circularly polarized beams. Here, we demonstrate its ability to create a strong longitudinal field by comparing the tight focusing characteristics of fractional-order vortex modulated radial polarized and left-handed circular polarized Bessel-Gauss beams. Additionally, the possibility of generating arbitrary fractional-order vortex modulated Bessel-Gauss beams with a strong longitudinal field is demonstrated. A special modulation method of left-handed circularly polarized Bessel-Gauss beams modulated by a fractional-order vortex is adopted creatively and a series of regulation laws are obtained. Specifically, the fractional-order phase modulation parameter n can accurately control the number of optical lobes. The ratio of the pupil radius to the incident beam waist β₁ can control the radius of the optical lobes. The first-order Bessel function amplitude modulation parameter β₂ can control the number of layers of optical lobes. This work not only adds a new modulation method for optical micromanipulation and optical communication, but also enriches the research on fractional vortex beams which has very important academic significance.

목차

I. INTRODUCTION
II. THEORETICAL ANALYSIS
III. RESULTS AND DISCUSSION
IV. CONCLUSION
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