Spectroscopic Polarimeter
Jonathan Peltzer, Russel Hollingsworth, and P. David Flammer
Summary: A spectroscopic polarimeter that contains designs for filtering light for both a
specific bandwidth and for selecting a single polarization state
Description: This invention is of plasmonic focusing structures that both filter light for a specific
frequency bandwidth and select a single polarization state. The design is fabricated by etching
or patterning groves into a substrate with a centrally smooth area, laying down a thin layer of
dielectric material, and then laying down a metal over the cavity. Specific geometric parameters
depend on what wavelength is desired to be passed by the structure. The spectral bandwidth
can be tuned to meet the needs of the application. It can be made to focus for both wavelength
from the visible to deep infrared. The extinction ratio of the desired polarization the undesired
can be as high as one million. Modifications to the structure can also yield circular polarization
selectivity allowing for full Stokes polarization measurement.
Main Advantages of this Invention
 Demonstrated extinction ratios that are a factor of ten higher than current methods.
 Combines spectral and polarization filtering into a single structure; post processing
allows for improved image quality
Potential Areas of Application
 CCD Cameras
 Detector arrays
 Biomedical imaging
 Polarimetric image
 Surveillance
ID number: 10001
Plasmonic micropolarizer structure and simulated time
Publications: Peltzer et al. Optics Express,
average power flow through aperture of the structure.
2011, 19, 18072.
Intel ectual Property Status: US utility patent pending (application #13/507,479)
Opportunity: We are seeking an exclusive or non-exclusive licensee for marketing,
manufacturing, and sale of this technology.
For more information contact:
William Vaughan, Director of Technology Transfer
Colorado School of Mines, 1500 Illinois Street, Guggenheim Hall Suite 314, Golden, CO 80401
Phone: 303-384-2555; e-mail: wvaughan@mines.edu