Coherent Control of the Hartman Effect through a Photonic Crystal with Four-Level Defect Layer |
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Authors: | Feng-Lian Hu Fazal Badshah Abdul Basit Hai-Yang Zhang Qing He Guo-Qin Ge |
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Institution: | 1. School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Quantum Optics Lab. Department of Physics, COMSATS Institute of Information Technolgy, Islamabad, Pakistan;
3. College of Science, Zhongyuan University of Technology, Zhengzhou 450000, China |
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Abstract: | In this paper, we examine the transmission of a probe field through a one dimensional photonic crystal (1DPC) when the sixth layer of the crystal is doped with four level atoms. We analyze effects of the external driving field on the passage of weak probe field across the photonic crystal. It is found that for the phase time delay of the probe photons, intensity of the driving field switches the Hartman effect from sub to superluminal character. It is interesting to note that in our model, the superluminal transmission of the probe pulse is accompanied by a negligibly small absorption of the incident beam. It ensures that the probe field does not attenuate while passing through the photonic crystal. A similar switching of the Hartman effect may be obtained by adjusting detuning of the probe field related to the excited states of the four-level doping atoms. |
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Keywords: | phase time delay photonic crystal Hartmann effect superclassicality |
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