Virtual-Real Quantum Interference in a Semiconductor System
H Ahn, S B. Choe, D S. Kim, J M. Shacklette, Y S. Lim
Probabability amplitude in the upper state can be induced by the off-resonant, virtual excitations as well as by the resonant, real excitations. Bytwo-color pulse shaping, we simultaneously create virtual and real amplitudes for excitons in GaAs quantum wells, and monitor population andamplitude by pump-probe and four-wave mixing spectroscopies. Population modulation in time-domain results from the interference betweenthe virtual and real amplitudes, and the modulation depth reveals the relative contributions of these two amplitudes. The fact that virtual and real amplitudes have a phase difference of 90 degrees is demonstrated for the first time in time-domain.
Physical Review Letters
exciton, semiconductors, ultrafast
, Choe, S.
, Kim, D.
, Shacklette, J.
and Lim, Y.
Virtual-Real Quantum Interference in a Semiconductor System, Physical Review Letters
(Accessed December 9, 2023)