Coherent Quantum Control of Excitons at Ultracold and High Density in Cu2O with Phase Manipulated Pulses

Takuro Ideguchi (1, 2) , Kosuke Yoshioka (1, 2) , André Mysyrowicz (3) , Makoto Kuwata-Gonokami (1, 2)

1 Department of Applied Physics
2 CREST - Core Research for Evolutional Science and Technology
3 LOA - Laboratoire d'optique appliquée

By phase manipulation of a short laser pulse, it is possible to selectively generate ultracold excitons in a two-photon process while quenching the multiphoton excitation of hot electrons and holes. We show how this technique allows us to suppress the heating of n=1 orthoexcitons in Cu2O at high density. Using a laser pulse having an energy of a few μJ and duration of 100 fs, we are thus able to produce a cold exciton gas up to a density of 10^15  cm^-3.

Domaines: Optique [physics.optics]

Takuro Ideguchi, Kosuke Yoshioka, André Mysyrowicz, Makoto Kuwata-Gonokami. Coherent Quantum Control of Excitons at Ultracold and High Density in Cu2O with Phase Manipulated Pulses. Physical Review Letters, 2008, 100 (23), pp.233001. ⟨10.1103/PhysRevLett.100.233001⟩. ⟨hal-00558905⟩