Abstract

This work investigates SU-8 polymer waveguides as a fabrication platform for integrated optical structures. Surface roughening using oxygen plasma etching is used to induce controlled optical scattering, enabling direct observation of guided modes and providing insight into waveguide behavior. Building on this, waveguide geometry is modified through an elevated scattering region (ESR) design, which reduces transition losses and improves scattering efficiency by preserving optical volume within the guiding region. In parallel, suspended SU-8 membranes are fabricated and evaluated for mechanical stability, providing a platform for integrating optical structures beyond conventional substrate-bound configurations. These membranes are further characterized under electrostatic actuation, demonstrating controlled mechanical deflection within the fabricated structures.

Degree

MS

College and Department

Ira A. Fulton College of Engineering; Electrical and Computer Engineering

Rights

https://lib.byu.edu/about/copyright/

Date Submitted

2026-04-14

Document Type

Thesis

Keywords

SU-8 waveguides, polymer waveguides, multimode interference, optical scattering, oxygen plasma etching, elevated scattering region, microfabrication, suspended membranes

Language

english

Included in

Engineering Commons

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