1. Department of Electron Devices & Circuits, University of Ulm, Albert‐Einstein‐Alle 45, 89081 Ulm, Germany
2. Department of Optoelectronics, University of Ulm, Albert‐Einstein‐Alle 45, 89081 Ulm, Germany
3. Air Force Research Laboratory, Sensors Directorate, Wright‐Patterson Air Force Base, 202 Avionics Circle, Dayton, Ohio 43240 USA
4. Air Force Research Laboratory, Materials & Manufacturing Directorate, Wright‐Patterson Air Force Base, 202 Avionics Circle, Ohio 45433 USA