Generation of a dark nonlinear focus by spatio-temporal coherent control
نویسندگان
چکیده
The transition probability of a two-photon absorption (TPA) process in atomic Cesium, excited by phase-controlled temporally focused ultrashort pulses is shown to be spatially modulated in a controlled manner. In particular, we demonstrate the generation of a dark nonlinear focus. By controlling the excitation pulse shape along the propagation coordinate we create a region in space where the TPA rate vanishes which is flanked by bright regions. 2006 Elsevier B.V. All rights reserved. PACS: 32.80.Qk; 42.65.Ky
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