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Article Dans Une Revue Optics Express Année : 2017

Scaling the abruptly autofocusing beams in the direct-space

Résumé

We propose a simple technique to scale the abruptly autofocusing beams in the direct space by introducing a scaling factor in the phase. Analytical formulas are deduced based on optical caustics, explicitly revealing how the scaling factor controls location, peak intensity, and size of the focal spot. We demonstrate that the multiplication of a scaling factor on the phase is equivalent to the axial-scaling transformation under the paraxial approximation. Further numerical and experimental results confirm theoretical predictions. In addition, amplitude modulation using phase-only holograms is used to maintain the peak intensity level of the focal spots.

Dates et versions

hal-02392685 , version 1 (04-12-2019)

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Zhenyu Zhao, Chen Xie, Dandan Ni, Yuquan Zhang, Yanfeng Li, et al.. Scaling the abruptly autofocusing beams in the direct-space. Optics Express, 2017, 25 (24), pp.30598 - 30605. ⟨10.1364/OE.25.030598⟩. ⟨hal-02392685⟩
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