Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits

Jing Zhu; Pei Zhang; Dongzhi Fu; Dongxu Chen; Ruifeng Liu; Yingnan Zhou; Hong Gao; Fuli Li

doi:doi:10.1364/prj.4.000187

Photonics Research, 2016, 4 (5): 05000187, Published Online: Nov. 23, 2016

Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits Download： 926次

Jing Zhu ¹Pei Zhang ^1,2,*Dongzhi Fu ¹Dongxu Chen ¹Ruifeng Liu ¹Yingnan Zhou ¹Hong Gao ¹Fuli Li ¹

Author Affiliations

¹ Laboratory of Quantum Information and Quantum Optoelectronic Devices, Shaanxi Province, Xian Jiaotong University, Xian 710049, China

² Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Science, Hefei 230026,China

Figures & Tables

Fig. 1. Schematic of ADS interference. α is the width of an angular single slit, and ϕ is the angle between dynamic two single slits. q1, q2, and q3 are three points on the mask and oq3 is the angular bisector of ∠q1oq2. P is a point on the far field (with q1P=q2P), which is chosen to observe interferential intensity. θ represents an additional phase on one single slit.

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Fig. 2. Sketch of the experimental setup. The inset shows the mask pattern loaded on the SLM.

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Fig. 3. I−ϕ curves in polar coordinates when the additional phase θ is zero. The black dots are the experimental data and the green solid curves are fits of the data. M is the theoretical FTC and |Mf| is the modulus of the FTC, which is obtained by fitting the experimental data to the fitting function.

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Fig. 4. Contrasted I−ϕ curves between θ=0 (the blue curve) and θ=π/2 (the purple curve) with M=4.3.

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Jing Zhu, Pei Zhang, Dongzhi Fu, Dongxu Chen, Ruifeng Liu, Yingnan Zhou, Hong Gao, Fuli Li. Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits[J]. Photonics Research, 2016, 4(5): 05000187.

Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits Download： 926次

Fig. 2. Sketch of the experimental setup. The inset shows the mask pattern loaded on the SLM.

Fig. 4. Contrasted I−ϕ curves between θ=0 (the blue curve) and θ=π/2 (the purple curve) with M=4.3.

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Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits Download： 926次

Fig. 2. Sketch of the experimental setup. The inset shows the mask pattern loaded on the SLM.

Fig. 4. Contrasted I−ϕ curves between θ=0 (the blue curve) and θ=π/2 (the purple curve) with M=4.3.

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