Title :
Observation of Angle Switching of Dressed Four-Wave Mixing Image
Author :
Suling Sang ; Zhenkun Wu ; Jia Sun ; Huayan Lan ; Yiqi Zhang ; Xun Zhang ; Yanpeng Zhang
Author_Institution :
Key Lab. for Phys. Electron. & Devices of the Minist. of Educ., Xi´an Jiaotong Univ., Xi´an, China
Abstract :
We experimentally report that angle-control dynamics in the nonlinear propagation of the images of the probe, generated four-wave mixing (FWM) and fluorescence signals beams in FWM process in a cascade three-level, as well as a two-level atomic systems. It is shown that, by changing the angles between pumping fields and dressing fields, respectively, the characteristics of the measured signals including the spectra intensity and spatial images can be controlled to display many effects, including the electromagnetically induced transparency and absorption (EIT and EIA, respectively) and Autler-Townes splitting. In particular, we demonstrate the angle-controlled switching from EIA to EIT in probe transmission or from enhancement to suppression in FWM signal. Additionally, we also illustrate the interaction between spatial characteristics and spectra intensities of weak fields. The studies can be very useful in producing all optical-signal-processing devices, such as spatial beam splitters, routers, and switches.
Keywords :
Stark effect; atom-photon collisions; dressed states; fluorescence; light propagation; multiwave mixing; optical control; optical pumping; optical switches; self-induced transparency; spectral line intensity; Autler-Townes splitting; EIA; EIT; FWM signal; angle-control dynamics; angle-controlled switching; cascade three-level systems; dressed four-wave mixing image; dressing fields; electromagnetically induced absorption; electromagnetically induced transparency; fluorescence signal beams; nonlinear propagation; optical-signal-processing devices; probe transmission; pumping fields; routers; spatial beam splitters; spatial characteristics; spatial images; spectra intensities; two-level atomic systems; Absorption; Atomic beams; Fluorescence; Laser beams; Photonics; Probes; Tomography; Coherence; Kerr effect; four-wave mixing;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2012.2217946