title: EIT-based all-optical switching and cross-phase modulation under the influence of four-wave mixing.
abstract: All-optical switching (AOS) or cross-phase modulation (XPM) based on the effect of electromagnetically induced transparency (EIT) makes one photon switched or phase-modulated by another possible. The existence of four-wave mixing (FWM) process greatly diminishes the switching or phase-modulation efficiency and hinders the single-photon operation. We proposed and experimentally demonstrated an idea that with an optimum detuning the EIT-based AOS can be completely intact even under the influence of FWM. The results of the work can be directly applied to the EIT-based XPM. Our work makes the AOS and XPM schemes more flexible and the single-photon operation possible in FWM-allowed systems.
authors.affiliation: Department of Physics and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, Taiwan.
authors.forename: Meng-Jung
authors.initials: MJ
authors.lastname: Lee
authors.forename: Yi-Hsin
authors.initials: YH
authors.lastname: Chen
authors.forename: I-Chung
authors.initials: IC
authors.lastname: Wang
authors.forename: Ite A
authors.initials: IA
authors.lastname: Yu