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Physics Department, University of Crete, P.O. Box 2208, Heraklion 71003, Crete, Greece
Microelectronics Research Group, Institute of Electronic Structure & Laser, Foundation For Research and Technology-Hellas, P.O. Box 1527, Heraklion 71110, Crete, Greece
Microelectronics Research Group, Institute of Electronic Structure & Laser, Foundation For Research and Technology-Hellas, P.O. Box 1527, Heraklion 71110, Crete, Greece
Microelectronics Research Group, Institute of Electronic Structure & Laser, Foundation For Research and Technology-Hellas, P.O. Box 1527, Heraklion 71110, Crete, Greece
Physics Department, University of Crete, P.O. Box 2208, Heraklion 71003, Crete, Greece
Microelectronics Research Group, Institute of Electronic Structure & Laser, Foundation For Research and Technology-Hellas, P.O. Box 1527, Heraklion 71110, Crete, Greece
Microelectronics Research Group, Institute of Electronic Structure & Laser, Foundation For Research and Technology-Hellas, P.O. Box 1527, Heraklion 71110, Crete, Greece
Rutgers, The State University of New Jersey, Department of Electrical and Computer Engineering, 94 Brett Rd., Piscataway, New Jersey 08854-8058, USA