1. Department of Physics, Duke University, Durham, North Carolina 27708, United
States
2. AEgis Technologies Group, Inc., 410 Jan Davis Drive, Huntsville, Alabama
35806, United States
3. Department
of Electrical and Computer
Engineering, Duke University, Durham, North
Carolina 27708, United States
4. Army Aviation and Missile RD&E Center, Redstone Arsenal, Alabama 35898, United States