Title :
Phonon-assisted two-photon absorption in the presence of a DC-field: The nonlinear franz-keldysh effect in indirect gap semiconductors
Author :
Garcia, Hernando ; Kalynamaran, Ramki
Author_Institution :
Dept. of Phys., Southern Illinois Univ., Edwardsville, IL
Abstract :
The absorption coefficient of a two-photon excitation in which phonons participate during the transition is calculated for an indirect-gap semiconductor under a uniform DC-Field. Below Eg/2 tunneling is found, while above Eg/2 Franz-Keldysh oscillations are absent.
Keywords :
absorption coefficients; electro-optical effects; elemental semiconductors; photoexcitation; silicon; two-photon spectra; DC-electric field effect; Si; indirect gap semiconductors; nonlinear Franz-Keldysh effect; nonlinear absorption coefficient; phonon-assisted two-photon absorption; two-photon excitation; Absorption; Effective mass; Nonlinear optics; Phonons; Photonic band gap; Physics; Solids; Tail; Tunneling;
Conference_Titel :
Lasers and Electro-Optics, 2006 and 2006 Quantum Electronics and Laser Science Conference. CLEO/QELS 2006. Conference on
Conference_Location :
Long Beach, CA
Print_ISBN :
978-1-55752-813-1
Electronic_ISBN :
978-1-55752-813-1
DOI :
10.1109/CLEO.2006.4628477
