Kate Bachman

Colorado School of Mines · Department of Physics

We present simulation and experimental results for easily fabricated spiral plasmonic antenna analogues providing circular polarization selectivity. One circular polarization state is concentrated and transmitted through a subwavelength aperture, while the opposite circular state is blocked. The spectral bandwidth, efficiency, and extinction ratios...

Polarimetric imaging using micropolarizers integrated on focal plane arrays has previously been limited to the linear components of the Stokes vector because of the lack of an effective structure with selectivity to circular polarization. We discuss a plasmonic micropolarizing filter that can be tuned for linear or circular polarization as well as...

This study regards discrete mutual information and demonstrates the use of the theory with an example of radiological image registration with in-plane, two- dimensional images, using various search strategies. Image registration is the process of finding an optimal geometric transformation between corresponding image data. Although it has applicati...

The semantic and algorithmic differences between fuzzy and possibilistic optimization methods are presented in the context of three methods for solving large fuzzy and possibilistic optimization problems. In particular, an optimization problem in radiation therapy with various orders of complexity, 1,000-55,000 constraints, possessing (i) soft cons...

Fuzzy and possibilistic optimization methods are demonstrated to be effective tools in solving large-scale problems. In particular, an optimization problem in radiation therapy with various orders of complexity from 1000 to 62,250 constraints for fuzzy and possibilistic linear and nonlinear programming implementations possessing (1) fuzzy or soft i...

A basic MATLAB GUI that I created for computation of optimal angles and radiation dosage (from sets of evenly spaced angles comprised of pencils) using a segmented 2D image.

A basic MATLAB GUI that I created for computation of optimal angles and radiation dosage (from sets of evenly spaced angles comprised of pencils) using a segmented 2D image.