[1] Univ Ghent, IMEC, Dept Informat Technol, B-9000 Ghent, Belgium
[2] Chalmers, Dept Microelect, Photon Lab, SE-41296 Gothenburg, Sweden
[3] Chalmers, Microtechnol Ctr MC2, SE-41296 Gothenburg, Sweden
[4] USAF, Res Lab, Sensors Directorate, SNHC, Hanscom AFB, MA 01731 USA
[5] Avalon Photon Ltd, CH-8048 Zurich, Switzerland
[6] Politecn Torino, Dipartimento Elettron, CNR, IRITI, I-10129 Turin, Italy
[7] Politecn Torino, INFM, I-10129 Turin, Italy
[8] Ferdinand Braun Inst Hochstfrequenztech, D-12489 Berlin, Germany
[9] Univ Illinois, Beckman Inst, Urbana, IL 61801 USA
[10] Fern Univ Hagen, D-58084 Hagen, Germany
[11] Sci Applicat Int Corp, Mclean, VA 22102 USA
[12] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA
[13] Princeton Optron, Princeton, NJ 08543 USA