Purdue University Graduate School
David Kortge Thesis Final.pdf (14.3 MB)

Simulation, Construction, and Testing of a Lloyd's Mirror Lithographic Interferometer

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posted on 2019-02-12, 18:24 authored by David J. KortgeDavid J. Kortge
Fabrication of nanoscale highly periodic structures is a vital capability for research on quasicrystals, directional and specular selective emitters, and plasmonics. Laser interference lithography is a maskless lithography process capable of producing patterns with high periodicity over large areas, and is compatible with standard optical lithography processing. In this work, a Lloyd's mirror lithographic interferometer is simulated, built, and tested. Featuring a HeCd CW laser at 325 nm, spatial lter, and vacuum stage, it is capable of generating patterns with a sub-100 nanometer half pitch, over a large area (approximately 8 cm2), with minimal distortion, in a single exposure; with 2D patterns possible using multiple exposures. The interferometer features a compact sliding enclosure, simple alignment and operation, and quick adjustments to the desired period. One-dimensional and two-dimensional patterns were generated and matched well with simulation.


Degree Type

  • Master of Science in Electrical and Computer Engineering


  • Electrical and Computer Engineering

Campus location

  • West Lafayette

Advisor/Supervisor/Committee Chair

Peter Bermel

Additional Committee Member 2

Muhammad Ashraful Alam

Additional Committee Member 3

Daniel S. Elliott