Ultrafast multi-focus 3-D nano-fabrication based on two-photon polymerization.

Area of Science:

• Materials Science
• Nanotechnology
• Photonics

Background:

• Two-photon polymerization (TPP) is a high-resolution 3D printing technique.
• Current TPP methods are slow due to serial laser scanning, limiting practical applications.
• High costs and slow fabrication rates restrict TPP to laboratory use.

Purpose of the Study:

• To develop a faster and more efficient laser nanofabrication process.
• To overcome the limitations of serial scanning in TPP.
• To enable large-scale nano-prototyping and fabrication of complex 3D nanostructures.

Main Methods:

• Utilized two-photon polymerization (TPP) combined with a digital micromirror device (DMD) scanner.
• Employed binary holography for simultaneous generation and control of multiple laser foci.
• Achieved parallel nanofabrication at a rate of 22.7 kHz.

Main Results:

• Successfully fabricated complex 3D structures, including trusses and woodpile designs.
• Demonstrated a resolution of approximately 500 nm.
• Enabled parallel fabrication of one to tens of laser foci simultaneously.

Conclusions:

• The novel TPP-DMD system offers a revolutionary approach to laser nanofabrication.
• This parallel processing capability significantly enhances fabrication rates.
• The technology has the potential for large-scale nano-prototyping and creating intricate structures, impacting nanomanufacturing.