Multi-array autofocusing beams with tunable focal dynamics and self-healing

We propose and demonstrate a new class of adjustable multi-array autofocusing beams with self-healing properties. Unlike conventional abrupt autofocusing beams such as circular Airy or Pearcey beams, which offer limited flexibility in focal dynamics, the proposed autofocusing beams are generated via a rotational superposition of self-rotating phases. This method enables precise control over the number of beam arrays, focal length, and depth of focus using a single parameter b . The autofocusing beam maintains a small focal spot at a distance of approximately 4 cm. Both numerical simulations based on angular spectrum theory and experimental measurements confirm that these beams can converge into a single tight focus while maintaining autofocusing behavior even after partial obstruction. The combination of tunable multi-array generation, adjustable focusing dynamics, and self-healing distinguishes our study from existing autofocusing beams. These features provide new possibilities for applications in optical tweezers, dynamic beam manipulation, and super-resolution microscopy.