Date of Submission

Fall 2024

Academic Program

Chemistry and Biochemistry

Project Advisor 1

Chris LaFratta

Abstract/Artist's Statement

This research explores the principles, methodologies, and implications of using direct laser writing (DLW) for high-resolution microscale fabrication, with a focus on understanding the proximity effect in one-photon absorption (OPA) systems. This study aims to quantitatively characterize the proximity effect specifically in one-photon absorption using a 532 nm laser and is inspired by Von Freymann et al.’s research37 who investigated the dependance of the proximity effect on space and time scales with a two-photon absorption system. The proximity effect is known to cause undesired effects like linewidth broadening which results in a loss of resolution and distortion of intended microstructures. In this study, we present a method to measure the strength of the proximity effect on a timescale similar to Von Freymann et al. but using a 532 nm laser. The results provide a quantitative measure of this effect's strength in one photon absorption and suggest that molecular diffusion likely plays a major role in the proximity effect. Mitigation strategies, based on the results, are suggested like optimizing distance and exposure parameters. Further research and data collection is needed to understand the proximity effect over a larger space and time scales.

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