Chaotic Cavity Gas Cell for Optical Trace Explosives Detection

Overview and Technical Approach

Compact, stable gas cells are needed for high-sensitivity mid-infrared optical trace detection

  • Asymmetric cavities with quasi-chaotic ray trajectories are less susceptible to environmental perturbations and manufacturing imperfections
  • By understanding the optical properties of asymmetric cavities, we can design compact, robust gas cells that support long pathlengths for mid-infrared trace detection
  • Seek low-cost, compact, simple optical sensors that can be integrated into multi-mode detection networks

Relevance to the Homeland Security Enterprise

  • Mid-infrared optical vapor detection for improved detection sensitivity and reduced system complexity & cost
  • Small footprint and unattended operation enables expansion and enhancement of multi-mode stand-off detection networks
  • Understanding of chaotic cavities will lead to improved gas cells and optical sensors
Project Leader
  • Anthony J. Hoffman
    Assistant Professor
    University of Notre Dame

Students Currently Involved in Project
  • Michael Harter
    University of Notre Dame
  • Galen Harden
    University of Notre Dame