Work

Rapid fabrication of height-tunable high-aspect-ratio voxels by tailored Bessel beams

Year: 2026

Type: article

Abstract: We present a fast method to produce height-controllable high-aspect-ratio (HAR) voxels in the two-photon polymerization process. By loading complex-amplitude encoded holograms onto a phase-only spatial light modulator (SLM), precise control over the axial intensity profile of a Bessel beam is achieved, enabling the fabrication of height-tunable HAR voxels in a single exposure without mechanical axial motion. The voxel height can be adjusted independently and continuously over a range of 15 μm while maintaining the constant lateral size of 1.3 μm simply by switching tailored Bessel beam holograms. As demonstrated, microneedle arrays and hollow circular and polygonal microtubes with graded heights were fabricated.

Source: Optics Express

DOI: 10.1364/oe.599852

Authors: Tongyan Liu, Yue Yang, Ruiqi Wang, François Courvoisier, Minglie Hu, Chen Xie

Institutions: Tianjin University, Centre National de la Recherche Scientifique, Franche-Comté Électronique Mécanique Thermique et Optique - Sciences et Technologies, Université Marie et Louis Pasteur

Language: English

Topic: Nonlinear Optical Materials Studies

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: National Natural Science Foundation of China