Directional emissivity from two-dimensional infrared waveguide arrays
Abstract
Fabrication and optical characterization of surfaces covered with open-ended metallic waveguides are presented along with numerical modeling of these structures. Both modeling and measurement of the structures indicate that the 2-D array of 3D metallic waveguides modify both the direction and spectral content of the emissivity, resulting in directionality normal to the surface due to the optical axis of the waveguides and spectrally narrow emissivity due to the lateral dimensions of the waveguides. Furthermore, the optical behavior of these structures is placed in the broader context of other structured emission/absorption surfaces such as organ pipe modes, surface plasmon modes, and coherent thermal emission from gratings.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 21, 2015
- Source ID
- 10.1063/1.4931124
Entities
People
- David Bruce Burckel
- James C. Ginn
- Patrick Sean Finnegan
- Paul S. Davids
- Pedro N. Figueiredo
Organizations
- Air Force Office of Scientific Research
- Sandia National Laboratories