Lower-Upper Polariton Interactions Proved with Two-Dimensional Fourier Transform (2DFT) Spectroscopy in Semiconductor Microcavity

Naotomo Takemura (1) , Stephane Trebaol (2) , Verena Kohnle (1) , Yoan Léger (2) , Mitchell D Anderson (1) , Marcia Portella-Oberli (1) , Benoit Deveaud-Plédran (1)

1 Institute of Condensed Matter Physics [Lausanne]
2 FOTON - Fonctions Optiques pour les Technologies de l'informatiON

Two-dimensional Fourier transform (2DFT) spectroscopy is a powerful tool commonly used for investigating anharmonic coupling between different molecular vibrational states [1]. We applied this technique to a GaAs based semiconductor microcavity for investigating interactions among lower (LP) and upper (UP) polaritons. The observed 1-quantum and 2-quatum 2DFT experimental spectra are presented in Fig. 1 (a, c). Both spectra show four peak groups that correspond to LP-LP and UP-UP (diagonal peaks) and LP-UP and UP-LP interactions (off-diagonal peaks). Inside each peak, a complex structure can be found.

Domaines: Gaz Quantiques [cond-mat.quant-gas]

Naotomo Takemura, Stephane Trebaol, Verena Kohnle, Yoan Léger, Mitchell D Anderson, et al.. Lower-Upper Polariton Interactions Proved with Two-Dimensional Fourier Transform (2DFT) Spectroscopy in Semiconductor Microcavity. 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference (CLEO-Europe/EQEC 2015), Jun 2015, Munich, Germany. pp.EG_P_5. ⟨hal-02400517⟩