Steering abrupt autofocusing beams with metasurfaces [Invited]
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Pages (from-to) | D1-D7 |
Journal / Publication | Journal of the Optical Society of America B: Optical Physics |
Volume | 41 |
Issue number | 11 |
Online published | 28 Jun 2024 |
Publication status | Published - Nov 2024 |
Link(s)
Abstract
Abrupt autofocusing (AAF) beams, known for their non-diffractive properties, extended focal depth, and self-healing capabilities, are advantageous over conventional Gaussian beams in the biomedical field. Compared to the previous method that can only generate a passive AAF beam, we introduce metasurfaces to achieve a dynamically steered AAF beam at the incident wavelength of 532 nm. By rotating the two metasurfaces in opposite directions of an angle 𝜃, both the generated position of the AAF beam and the autofocusing direction can be altered. Our theoretical analysis and full-wave simulation results confirmed that the deflection angle of the AAF beam can be finely adjusted from −11° to 11° without significantly affecting the focal length or focusing efficiency. This capability allows for precision operation in biomedical applications, including enhanced laser surgery, optical tweezing, and optimized photodynamic therapy. © 2024 Optica Publishing Group.
Citation Format(s)
Steering abrupt autofocusing beams with metasurfaces [Invited]. / LIN, Rong; YAO, Jin; ZHANG, Jingcheng et al.
In: Journal of the Optical Society of America B: Optical Physics, Vol. 41, No. 11, 11.2024, p. D1-D7.
In: Journal of the Optical Society of America B: Optical Physics, Vol. 41, No. 11, 11.2024, p. D1-D7.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review