Title :
THz imaging of free carrier density based on quantum cascade lasers under optical feedback
Author :
Mezzapesa, F.P. ; Columbo, L.L. ; Brambilla, M. ; Dabbicco, M. ; Beere, H.E. ; Ritchie, D.A. ; Vitiello, M.S. ; Scamarcio, G.
Author_Institution :
Dipt. Interateneo di Fis., Univ. degli Studi e Politec. di Bari, Bari, Italy
Abstract :
We demonstrate a detectorless THz imaging based on quantum cascade lasers operating under optical feedback to monitor the spatial distribution of free electron plasma induced onto a semiconductor by photo-excitation with a reconfigurable pattern of NIR laser pump.
Keywords :
laser feedback; optical pumping; quantum cascade lasers; terahertz wave imaging; NIR laser pump; detectorless THz imaging; free carrier density; free electron plasma; optical feedback; photo-excitation; quantum cascade lasers; reconfigurable pattern; semiconductor; spatial distribution; Charge carrier density; Imaging; Laser beams; Laser excitation; Optical feedback; Quantum cascade lasers;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
