Tunable Infrared Pixels via Monolithically Integrated Dynamic Graphene Metasurfaces
Abstract
Long-wave infrared (LWIR) pixels exhibiting dynamic, real-time, spectral tunability were designed, fabricated, and tested. The pixels are composed of a type-II superlattice detector that is monolithically integrated with a graphene enabled tunable metasurface. The combined detector and filter operate as a single solid state device with no moving parts whose alignment is implicit with fabrication. Functionally, tunability results from the plasmonic properties of graphene that are acutely dependent upon the carrier concentration within the infrared. Voltage induced changes in graphenes carrier concentration can thus be leveraged to change the metasurfaces transmission thereby altering the colors of light reaching the broadband detector and hence its spectral responsivity. These characteristics were practically demonstrated by measuring the spectral responsivity of the detector at varying levels of bias across the graphene where relative changes in excess of 20% were observed as a result of spectral shifts in the filter of nearly 50 cm-1 at approx. 1000 cm-1 . Taken in total, the effort serves as a proof of concept for spectrally agile infrared detection offering the potential of independent pixel to pixel spectral tunability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 25, 2019
- Accession Number
- AD1075324
Entities
People
- Anna Tauke-pedretti
- Clark Kadlec
- David W. Peters
- Eric A. Shaner
- Evan M. Anderson
- Isaac Ruiz
- J. F. Klem
- Jin K. Kim
- Joel R. Wendt
- Michael B. Sinclair
- Michael D. Goldflam
- Patrick Sean Finnegan
- Preston Webster
- Sam Hawkins
- Stephen W. Howell
- Thomas E. Beechem
- Torben R. Fortune
- Wesely Coon
Organizations
- Naval Surface Warfare Center