Impact of positioning error in double displacement Talbot lithography

Area of Science:

• Nanoscience and Nanotechnology
• Optical Engineering
• Materials Science

Background:

• Single exposure displacement Talbot lithography has limitations in pattern complexity and scalability.
• Double displacement Talbot lithography (D2TL) offers a massively parallel laser writing approach for advanced periodic patterns.

Purpose of the Study:

• To experimentally investigate and enhance the positioning accuracy of the D2TL platform.
• To assess the impact of residual positioning errors on nanostructure fabrication for advanced materials processing.

Main Methods:

• Comprehensive image analysis was employed to quantify positioning inaccuracies in the D2TL platform.
• Error compensation techniques were applied to mitigate systematic positioning errors.
• Simulations were conducted to evaluate the effect of residual random errors on resist profiles.

Main Results:

• Systematic positioning inaccuracies of the D2TL platform were reduced to a negligible level through error compensation.
• Simulations demonstrated that residual random errors have an inconsequential effect on the final resist profile for demanding use cases.
• The study quantified residual error values, enhancing the fidelity of subsequent experimental simulations.

Conclusions:

• D2TL is a robust and high-performance nanolithography technique.
• Error compensation is crucial for achieving high positioning accuracy in D2TL.
• D2TL presents a viable, low-cost solution for mass production of nanophotonic devices, plasmonic structures, and metamaterials.