The manipulation of light waves is a fundamental aspect of optics, with diffraction being a common obstacle that limits the efficiency of light transmission. Scientists have long sought ways to suppress diffraction effects in order to control the shape and direction of light beams. In recent years, significant breakthroughs have been made in the field of controlling non-diffracting light fields, paving the way for advancements in both fundamental optics and practical applications.

Decades ago, researchers predicted the existence of special beams such as Airy beams (ABs) and Bessel beams (BBs) that exhibit self-acceleration and self-bending without diffraction. These unique beams have opened up new possibilities in light manipulation and have led to the development of innovative optical devices. However, traditional methods of modulating non-diffracting light fields have been bulky and limited in resolution.

The introduction of metasurfaces has revolutionized the field of non-diffracting light manipulation. By employing nanoscale antenna arrays, metasurfaces allow for the precise control of light fields and the miniaturization of optical devices. This technology enables multidimensional control of light fields through birefringence, making it a key enabler for the development of next-generation photonic integrated platforms.

Recent research has made significant progress in modulating non-diffracting light fields using metasurfaces. By implementing a mechanism of joint local-global phase control, researchers were able to reconstruct non-diffracting light fields along the propagation path. This breakthrough allowed for the observation of circularly Airy beams (CABs) transforming into Bessel beams (BBs) over a distance.

The research team decomposed the 2D problem into the integration of 1D phase functions and the superposition of 2D phase functions, illustrating the process through theoretical analysis and ray tracing techniques. The modulation of the metasurface resulted in clear ABs converging into non-diffracting BBs, demonstrating the effectiveness of the joint local-global phase control mechanism.

The development of this technology represents a pivotal step in the use of non-diffracting light fields and the enhancement of metasurface functionality. It lays a solid foundation for the advancement of on-chip, nano-optical platforms and innovative manufacturing technologies. This breakthrough holds significant implications for the field of optics, driving optical device performance to new heights.

The breakthrough in modulating non-diffracting light fields using metasurfaces represents a significant advancement in the field of optics. The ability to control the shape and direction of light beams with high precision opens up new possibilities for the development of advanced optical devices and manufacturing technologies. This research paves the way for the continued evolution of non-diffracting light manipulation and the future of optical technologies.

Physics

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