Numerical Modeling of Omnidirectional Reflectivity

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9550-04-C-0041
Agency Tracking Number: F023-0030
Amount: $499,983.00
Phase: Phase II
Program: STTR
Awards Year: 2004
Solicitation Year: 2002
Solicitation Topic Code: AF02T015
Solicitation Number: N/A
Small Business Information
TECH-X CORP.
5621 Arapahoe Ave, Suite A, Boulder, CO, 80303
DUNS: 806486692
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Bruhwiler
 Vice President
 (303) 448-0732
 bruhwile@txcorp.com
Business Contact
 Sveta Shasharina
Title: VP / Recording Officer
Phone: (720) 563-0322
Email: sveta@txcorp.com
Research Institution
 University of Colorado at Boulder
 Laurence D Nelson
 Office of Contracts & Grants, 572 UCB
Boulder, CO, 80309
 (303) 492-2695
 Nonprofit college or university
Abstract
We will provide convenient and accurate time-domain modeling capabilities for electromagnetics (EM) in dielectric media with regions having oblique boundary conditions, specifically for devices exhibiting omnidirectional reflectivity. Omnidirectional reflectors, constructed with layers of dielectrics, reflect electromagnetic radiation with 100% efficiency for all incident angles and polarizations. The Phase I effort analyzed this system in both the time domain and the frequency domain. To provide time-domain modeling capabilities, we extended the VORPAL EM modeling code to include dielectrics and to allow nonplanar boundaries, and we used this capability to model photonic band gap systems. We further identified the algorithm to be used to obtain oblique boundary conditions accurate to second order in the grid size. In the frequency domain, Chiping Chen of MIT, our Phase I partner, advanced their PBGSS code for obtaining band gaps for dielectric crystals. In Phase II, we propose to implement higher-order boundary conditions, to model active media, and to provide a graphical user interface. In Phase II we will additionally work with Prof. Hesthaven of Brown University and Dan Barnes of the University of Colorado to develop and implement higher-order EM solvers. This part of the work may have applications for particle-in-cell methods.

* information listed above is at the time of submission.

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