Metalens for passive generation of a droplet Bessel beam.

ABSTRACT: Extending the depth of field (DOF) is essential for large-volume imaging in biological research, particularly in thick tissue environments. Bessel beams and their variants are widely used due to their simplicity and have been successfully applied to in vivo imaging. A recent advancement demonstrated the application of droplet Bessel beams (DBBs) for multi-photon microscopy, enabling functional imaging in live mouse brains. However, DBB generation inevitably requires active phase switching devices such as spatial light modulators, which reduce imaging speed and increase system complexity. This study introduces a droplet Bessel beam metalens (DBBM) that passively generates DBBs without phase switching by employing rectangular meta-atoms for orthogonal polarization modulation and X-shaped met

SUBMITTER: Jo Y 

PROVIDER: S-EPMC12644905 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature