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J. Eur. Opt. Society-Rapid Publ. 21, 35( 2025)
We verify the nondiffracting transmission characteristics of the generated radial carpet-lattice beams in the range of z < z max. Taking the radial carpet-lattice beam with m = 9 as an example, a charge-coupled device camera is used to record the intensity distribution in different propagation distances after the Fourier lens, as shown in Figure 5. The experimental results indicate that the radial carpetlattice beams generated by the Durnin’ s setup is an approximate nondiffracting beam, it maintaining basically unchanged shape and size, with only slight changes in light intensity in the range of z < z max. Hence the method to generate nondiffracting radial carpet-lattice beams based on the Durnin’ s setup is feasible.
4 Conclusion
We propose a generating method of nondiffracting radial carpet-lattice beams using an extended version of Durnin’ s experimental setup. We first establish the theoretical framework for constructing nondiffracting radial carpet-lattice beams. By loading the annular slit containing the transmission function information of radial gratings onto the SLM, a series of nondiffracting radial carpet-lattice beams were obtained on the plane behind the Fourier transform lens, the analytical expression for their optical field distribution is derived. We typically record several types of nondiffracting radial carpet-lattice beams by loading the annular slit with the radial grating transmission function information on the amplitude-type SLM. Experimental results verify the theoretical predictions, validating that the SLM-aided Durnin’ s experimental setup is an effective method to generate radial carpet-lattice beams with nondiffracting propagation. Furthermore, the similar setup can be adopted to generate other types of nondiffracting combined halfinteger Bessel-like beams.
Funding
This work was supported by National Natural Science Foundation of China( No. 62475240).
Conflicts of interest The authors declare no conflict of interest in regards to this article.
Data availability statement
This article has no associated data generated and / or analyzed. Data associated with this article cannot be disclosed due to legal / ethical / other reason.
Author contribution statement
Conceptualization, Ning Gong and Zhijun Ren; Methodology, Zhijun Ren; Software, Ning Gong, Yefeng Liu and Bo Zhang; Validation, Youxiang Ye, Changjiang Fan and Zhijun Ren; Formal Analysis, Ning Gong and Zhijun Ren; Writing – Original Draft Preparation, Ning Gong; Writing – Review & Editing, Ning Gong and Zhijun Ren; Project Administration, Ning Gong and Zhijun Ren.
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