Control of light in a quantized four level graphene atomic system via self and cross-Kerr nonlinearity |
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| Authors: | Usman Khan Bakht Amin Kefayat Ullah Arif Ullah |
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| Institution: | 1. Quantum Optics and Quantum Information Research Group, Department of Physics, University of Malakand, Khyber Pakhtunkhwa, Pakistan;2. Department of Applied Physical and Material Sciences, University of Swat, Khyber Pakhtunkhwa, Pakistan |
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| Abstract: | We investigate self and cross-Kerr nonlinearity in a four level quantized graphene atomic medium. The absorption, dispersion, transmission and subluminal/superluminal behaviors of a probe light field are studied. An amplification of the probe light field is observed in the absorption spectrum. The normal and anomalous slope of dispersion is also investigated at the positive/negative absorption region. It is shown that Kerr nonlinearity invert and enhance the subluminal/superluminal behaviors of the pulse and self-Kerr effect is found to be more subluminal/superluminal as compared to cross-Kerr effect. The results show significant applications in information storage, self and cross phase modulation and lasing without inversion. |
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| Keywords: | Corresponding author Nonlinear optics Optical Kerr effect Graphene |
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