Title :
Observation of femtosecond coherent midinfrared emission in asymmetric quantum wells
Author :
Bonvalet, A. ; Joffre, M. ; Alexandrou, A. ; Berger, V. ; Nagle, J. ; Migus, A. ; Martin, J.L.
Author_Institution :
ENSTA, Ecole Polytech., Palaiseau, France
Abstract :
Summary form only given. Here, we make use of the coherent charge oscillation in an asymmetric quantum well after excitation by a 15-fsec optical pulse, to produce mid-infrared radiation. As shown the bandwidth of such a short pulse is large enough to excite a wave packet consisting of a coherent superposition of states El and E2 of the asymmetric quantum well.
Keywords :
high-speed optical techniques; infrared sources; laser beam effects; semiconductor quantum wells; symmetry; 15 fs; asymmetric quantum well; asymmetric quantum wells; coherent charge oscillation; coherent superposition; femtosecond coherent midinfrared emission; fsec optical pulse; mid-infrared radiation; short pulse bandwidth; wave packet; Absorption; Biomedical optical imaging; Charge carrier processes; Electrons; Excitons; Nonlinear optics; Optical scattering; Phonons; Tunneling; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 1996. QELS '96., Summaries of Papers Presented at the
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
1-55752-444-0
