Self-Kerr Effect across the Yellow Rydberg Series of Excitons in <math display="inline"><mrow><msub><mrow><mi>Cu</mi></mrow><mrow><mn>2</mn></mrow></msub><mi mathvariant="normal">O</mi></mrow></math> - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Phys.Rev.Lett. Année : 2022

Self-Kerr Effect across the Yellow Rydberg Series of Excitons in Cu2O

Résumé

We investigate the nonlinear refraction induced by Rydberg excitons in Cu2O. Using a high-precision interferometry imaging technique that spatially resolves the nonlinear phase shift, we observe significant shifts at extremely low laser intensity near each exciton resonance. From this, we derive the nonlinear index n2, present the n2 spectrum for principal quantum numbers n5, and report large n2 values of order 10-3mm2/mW. Moreover, we observe a rapid saturation of the Kerr nonlinearity and find that the saturation intensity Isat decreases as n-7. We explain this with the Rydberg blockade mechanism, whereby giant Rydberg interactions limit the exciton density, resulting in a maximum phase shift of 0.5 rad in our setup.

Dates et versions

Identifiants

Citer

Corentin Morin, Jérôme Tignon, Juliette Mangeney, Sukhdeep Dhillon, Gerard Czajkowski, et al.. Self-Kerr Effect across the Yellow Rydberg Series of Excitons in Cu2O. Phys.Rev.Lett., 2022, 129 (13), pp.137401. ⟨10.1103/PhysRevLett.129.137401⟩. ⟨hal-03600486⟩
61 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More