Non-linear interactions in electromagnetically induced transparency and related pump-probe optical phenomena in moving atomic systems

2010 ◽  
Author(s):  
Verne L. Jacobs
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Pump Probe ◽  
Atomic Systems ◽  
Non Linear ◽  
Optical Phenomena ◽  
Induced Transparency ◽  
Linear Interactions

Experimental Verification of Circuit Analog of Three- and Four-Level Electromagnetically Induced Transparency

2011 ◽  
Vol 415-417 ◽  
pp. 1340-1349 ◽  
Author(s):  
Xi Chen ◽  
Xia Min Leng ◽  
Jing Xin Li ◽  
Yi Tsen Yeh ◽  
Teh Chau Liau ◽  
...  
Keyword(s):  
Quantum Interference ◽  
Electromagnetically Induced Transparency ◽  
External Control ◽  
Atomic Systems ◽  
Classical Counterpart ◽  
Atomic Vapors ◽  
Capacitor Coupling ◽  
Atom Interaction ◽  
And Control ◽  
Induced Transparency

Since a two-level resonant atomic system can be simulated by a simple circuit, three- and four-level electromagnetically induced transparency (EIT) that occur due to light-atom interaction can find its classical counterpart in circuit analog. As the optical response of an EIT atomic medium (including atomic vapors and semiconductor-quantum-dot dielectrics) can be controlled via tunable quantum interference induced by applied external control fields, in the scheme of circuit analog, such a controllable manipulation is achieved via capacitor coupling, where two loops are coupled by a capacitor that can represent the applied control fields in atomic EIT. Both numerical simulation and experimental demonstration of three- and four-level EIT were performed based on such a scenario of circuit analog. The classical “coherence” relevant to quantum interference among transitions pathways driven by both probe and control fields in EIT atomic systems has been manifested in the present circuit analog of EIT.

Higher order nonlinearities in a non-Doppler free geometryThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

2009 ◽  
Vol 87 (7) ◽  
pp. 843-850 ◽  
Author(s):  
Andal Narayanan ◽  
Archana Sharma ◽  
T. M. Preethi ◽  
H. Abheera ◽  
Hema Ramachandran
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Level Density ◽  
Kerr Nonlinearity ◽  
Low Light ◽  
Atomic Systems ◽  
Fourth Level ◽  
All Optical ◽  
Multi Level ◽  
Induced Transparency ◽  
Photon Resonance

Multi-level gaseous atomic systems showing electromagnetically induced transparency (EIT) phenomenon also exhibit low light intensity nonlinear optical phenomena. This is primarily due to the supression of linear susceptibility for the probe light during EIT. Therefore under EIT, nonlinear interactions become appreciable even at very low light intensities. In particular, Kerr nonlinearity in N systems irradiated by three fields has been both experimentally and theoretically investigated. In this paper, we report an all optical observation of an absorptive three-photon resonance feature, of subnatural width, in a N level scheme of gaseous rubidium, at room temperature, in a novel geometry of three independent beams. The non-Doppler free configuration of the beam in which the absorption is seen is the first such feature reported in a beam that is not directly taking part in the transparency effect. We have demonstrated the velocity selective nature of this absorption and studied the contrast dependence on detuning from the fourth level. Density matrix calculations have been carried out for this geometry, the results of which are in qualitative agreement with the experiment.

Controllable Four-Wave Mixing Signal inside a Cascade Three-Level Atomic System

2014 ◽  
Vol 644-650 ◽  
pp. 3951-3955
Author(s):  
Yun Zhe Zhang ◽  
Li Bo Fa ◽  
Hui Peng Gao ◽  
Yun Long Wang ◽  
Yin Wang ◽  
...  
Keyword(s):  
Probe Beam ◽  
Atomic System ◽  
Electromagnetically Induced Transparency ◽  
Laser Frequency ◽  
Four Wave Mixing ◽  
Nonlinear Propagation ◽  
Wave Mixing ◽  
Atomic Systems ◽  
Induced Transparency ◽  
Splitting Effect

We experimentally report that electromagnetically induced transparency (EIT) in the nonlinear propagation of probe beam, four-wave mixing (FWM) images and in a cascade three-level atomic systems. It is shown that by changing the frequency between pumping fields or dressing fields, respectively, the properties of the measured signals including the intensity and spatial images are affected greatly, including the electromagnetically induced transparency (EIT), Aulter-Townes splitting. By changing the laser frequency we can control the four wave signal, Moreover, the AT splitting effect due to spontaneous emission was also observed under EIT conditions..

scholarly journals Interplay between electromagnetically induced transparency and Autler-Townes effect in fivelevel atomic systems

2019 ◽  
Vol 204 ◽  
pp. 03013
Author(s):  
Gul Tiaz ◽  
Fazal Ghafoor ◽  
Rashid Nazmitdinov ◽  
Ehtiram Shahalyev
Keyword(s):  
Relative Phase ◽  
Electromagnetically Induced Transparency ◽  
Optical Field ◽  
Atomic Systems ◽  
Atomic Medium ◽  
Induced Transparency

We analyse the evolution of a weak probe optical field propagation through a five-level atomic medium cyclically driven by two strong optical and microwave fields. It is shown that the competition between the electromagnetically induced transparency and the Autler-Townes effect can be controlled by altering the relative phase of the coupling fields in the presence of the atomic dephasing reservoir.

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