Coherent nonlinear propagation of ultrafast electric field transients through intersubband resonances

Eickemeyer, F.; Woerner, M.; Weiner, A. M.; Elsaesser, T.; Hey, R.; Ploog, K. H.
July 2001
Applied Physics Letters;7/9/2001, Vol. 79 Issue 2
Academic Journal
Amplitude and phase-controlled midinfrared field transients at a wavelength of 12.5 μm induce resonant intersubband excitations in n-type modulation-doped GaAs/AlGaAs quantum wells. The transmitted electric field transients are directly measured by ultrafast electro-optic sampling. Coherent control of intersubband excitations is demonstrated by applying two phase-locked pulses with variable relative phase. A coherent nonlinear response corresponding to partial Rabi flops of up to 60° in the Bloch sphere is observed with excitation pulses of only 1 pJ energy. © 2001 American Institute of Physics.


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