Electrically tunable generation of vectorial vortex beams with micro-patterned liquid crystal structures

Zhichao Ji; Xinzheng Zhang; Yujiao Zhang; Zhenhua Wang; Irena Drevensek-Olenik; Romano Rupp; Wei Li; Qiang Wu; Jingjun Xu

doi:doi:10.3788/COL201715.070501

Chinese Optics Letters, 2017, 15 (7): 070501, Published Online: Jul. 20, 2018

Electrically tunable generation of vectorial vortex beams with micro-patterned liquid crystal structures Download： 1176次

Zhichao Ji ^1,4Xinzheng Zhang ^1,4,*Yujiao Zhang ^1,4Zhenhua Wang ¹Irena Drevensek-Olenik ²Romano Rupp ³Wei Li ¹Qiang Wu ¹Jingjun Xu ^1,4

Author Affiliations

¹ The MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Institute of Applied Physics and School of Physics, Nankai University, Tianjin 300457, China

² Faculty of Mathematics and Physics, University of Ljubljana and Department of Complex Matter, J. Stefan Institute, Ljubljana SI1000, Slovenia

³ Faculty of Physics, Vienna University, Wien A-1090, Austria

⁴ Synergetic Innovation Center of Chemical Science and Engineering, Tianjin 300071, China

Figures & Tables

Fig. 1. (a) Radial structure of polymer ribbons. Transmission POM images of the ribbon structure filled with a nematic LC under crossed polarizer and analyzer captured at different orientations of the polarizer with respect to the $x$ direction: (b) 0°, (c) 45°, (d) 90°, and (e) 135°. (f) Sketch of the LC alignment induced by the ribbon pattern.

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Fig. 2. (a) Setup for generating and analyzing G-CVBs. (b) Normalized transmission intensity after a circular polarizer placed behind the sample measured at different voltages.

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Fig. 3. SOP, phase fronts, and generated beam profiles detected with/without analyzer for four different optical retardations: (a) $δ = 2 π$ , (b) $δ = 3 π / 2$ , (c) $δ = π$ , and (d) $δ = π / 2$ . The orientation of the black arrows in dashed circles (see top of columns 4-7) represents the transmission axis of the analyzer.

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Fig. 4. SOP, phase fronts, and generated beam profiles detected with/without analyzer for different polarization directions of the incident linearly polarized light. Black arrows in the first column indicate polarization states of the ingoing beam. The orientation of black arrows in dash circles represents the transmission axis of the analyzer.

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Fig. 5. SOP, phase fronts, and generated azimuthal and radial VVB profiles detected with/without analyzer in the measurement system in which QWP2 (see Fig. 2) was replaced by two HWPs.

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Zhichao Ji, Xinzheng Zhang, Yujiao Zhang, Zhenhua Wang, Irena Drevensek-Olenik, Romano Rupp, Wei Li, Qiang Wu, Jingjun Xu. Electrically tunable generation of vectorial vortex beams with micro-patterned liquid crystal structures[J]. Chinese Optics Letters, 2017, 15(7): 070501.

Electrically tunable generation of vectorial vortex beams with micro-patterned liquid crystal structures Download： 1176次

Fig. 2. (a) Setup for generating and analyzing G-CVBs. (b) Normalized transmission intensity after a circular polarizer placed behind the sample measured at different voltages.

Fig. 5. SOP, phase fronts, and generated azimuthal and radial VVB profiles detected with/without analyzer in the measurement system in which QWP2 (see Fig. 2) was replaced by two HWPs.

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Electrically tunable generation of vectorial vortex beams with micro-patterned liquid crystal structures Download： 1176次

Fig. 2. (a) Setup for generating and analyzing G-CVBs. (b) Normalized transmission intensity after a circular polarizer placed behind the sample measured at different voltages.

Fig. 5. SOP, phase fronts, and generated azimuthal and radial VVB profiles detected with/without analyzer in the measurement system in which QWP2 (see Fig. 2) was replaced by two HWPs.

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