Experimental demonstration of twisted light’s diffraction theory based on digital spiral imaging

Wuhong Zhang; Ziwen Wu; Jikang Wang; Lixiang Chen

doi:doi:10.3788/COL201614.110501

Chinese Optics Letters, 2016, 14 (11): 110501, Published Online: Aug. 2, 2018

Experimental demonstration of twisted light’s diffraction theory based on digital spiral imaging Download： 1243次

Wuhong Zhang Ziwen Wu Jikang Wang Lixiang Chen ^*

Author Affiliations

Department of Physics, College of Physics Science and Technology, Xiamen University, Xiamen 361005, China

Figures & Tables

Fig. 1. Schematic of the theoretical frame based on the DSI technique (see the text for details).

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Fig. 2. Experimental setup for studying the diffraction of a twisted beam from a triangular aperture. Inset (a) is the triangular aperture, (b) is the holographic grating to produce the LG30 mode, and (c) is the hologram displayed on the SLM.

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Fig. 3. Spiral spectra of the triangular aperture based on DSI. (a) Intensity spectrum |Aℓ,p|2, (b) phase spectrum arg(Aℓ,p) (c) ℓ spectrum Cℓ=∑p|Aℓ,p|2 as a sum over all the p indices, (d) simulation results of the total initial field at the z=0 plane.

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Fig. 4. Numerical (upper row) and experimental (lower row) results of diffraction of the OAM beam with ℓ=3, which illustrate the gradual birth of the triangular optical lattices.

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Wuhong Zhang, Ziwen Wu, Jikang Wang, Lixiang Chen. Experimental demonstration of twisted light’s diffraction theory based on digital spiral imaging[J]. Chinese Optics Letters, 2016, 14(11): 110501.

Experimental demonstration of twisted light’s diffraction theory based on digital spiral imaging Download： 1243次

Fig. 1. Schematic of the theoretical frame based on the DSI technique (see the text for details).

Fig. 2. Experimental setup for studying the diffraction of a twisted beam from a triangular aperture. Inset (a) is the triangular aperture, (b) is the holographic grating to produce the LG30 mode, and (c) is the hologram displayed on the SLM.

Fig. 3. Spiral spectra of the triangular aperture based on DSI. (a) Intensity spectrum |Aℓ,p|2, (b) phase spectrum arg(Aℓ,p) (c) ℓ spectrum Cℓ=∑p|Aℓ,p|2 as a sum over all the p indices, (d) simulation results of the total initial field at the z=0 plane.

Fig. 4. Numerical (upper row) and experimental (lower row) results of diffraction of the OAM beam with ℓ=3, which illustrate the gradual birth of the triangular optical lattices.

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Experimental demonstration of twisted light’s diffraction theory based on digital spiral imaging Download： 1243次

Fig. 1. Schematic of the theoretical frame based on the DSI technique (see the text for details).

Fig. 2. Experimental setup for studying the diffraction of a twisted beam from a triangular aperture. Inset (a) is the triangular aperture, (b) is the holographic grating to produce the LG30 mode, and (c) is the hologram displayed on the SLM.

Fig. 3. Spiral spectra of the triangular aperture based on DSI. (a) Intensity spectrum |Aℓ,p|2, (b) phase spectrum arg(Aℓ,p) (c) ℓ spectrum Cℓ=∑p|Aℓ,p|2 as a sum over all the p indices, (d) simulation results of the total initial field at the z=0 plane.

Fig. 4. Numerical (upper row) and experimental (lower row) results of diffraction of the OAM beam with ℓ=3, which illustrate the gradual birth of the triangular optical lattices.

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