Nonlinear optical responses due to exciton-phonon interactions in strongly coupled exciton-phonon systems
Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, P.R.
2 Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong, P.R. China
Corresponding author: a firstname.lastname@example.org
Revised: 16 March 2004
Published online: 4 May 2004
The excitonic nonlinear optical responses due to exciton-phonon interactions in strongly coupled exciton-phonon systems are investigated theoretically. It is shown that the influence of exciton-phonon interactions on the nonlinear optical absorptions and Kerr nonlinear coefficients is significant as the signal field frequency detuning from the exciton frequency approaches to the optical phonon frequency. How to manipulate the nonlinear optical responses by using the control fields is also presented.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 42.50.Hz – Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift / 42.25.Bs – Wave propagation, transmission and absorption / 72.80.Le – Polymers; organic compounds (including organic semiconductors)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004