Energy efficient method for two-photon population transfer with near-resonant chirped pulses.
We investigate a method for complete population inversion in three level systems through pi-pulse bichromatic two-photon coherent excitation and study the dependence on the chirp of the laser pulses. We observe that the population inversion does not monotonously decrease with increasing the time-bandwidth product, and that the excitation depends on the sign of the chirp of the individual pulses. Our results evidence a strategy for coherent population transfer which is energetically superior to adiabatic methods and opens the door for real-world applications, since it alleviates the need for challenging generation of transform-limited pulses at arbitrary wavelengths.
Serrat
Carles
C
DTDI - Universitat de Vic, Carrer de la Laura 13, 08500 Vic, Barcelona, Spain.
Biegert
Jens
J