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Laguerre fields strength and beam waist-dependent superluminal propagation of light pulse in atomic medium

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Abstract

We address the superluminal propagation of light in a four-level atomic medium. The superluminal propagation of the probe field is controlled and modified by the strength and waists of control driving fields. Around the origin of Laguerre coordinates in the x, y plane, localized depth of absorption and localized peaks of dispersion are noticed. The localized depth of absorption and dispersion can be narrowed and broadened by changing the beam waist. Increasing the beam waist, we observed broadening in the width of localized absorption and dispersion. Negative group index from \(-\,10\) to \(-\,20\) and negative group velocity from \(-\,0.06\) to \(-\,0.12\) c are observed at the low beam waist. At high beam waist, group index and group velocity remain the same which shows superluminal behaviour in this region. The modified results show potential applications in gravitational wave detection, soliton radar system and speeding up computer processing.

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Data Availability Statement

This paper is theoretical research and has no associated data.

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Acknowledgements

This research has been funded by Scientific Research Deanship at University of Ha’il-Saudi Arabia through Project Number RG-21 063.

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Authors and Affiliations

  1. Quantum Optics and Quantum Information Research Group, Department of Physics, University of Malakand, Chakdara Dir(L), Khyber Pakhtunkhwa, Pakistan

    Saeed Ullah & Bakht Amin Bacha

  2. Department of Physics, Hazara University Mansehra, Mansehra, Pakistan

    Jehan Akbar

  3. Glasgow College, University of Electronic Science and Technology of China, Chengdu, China

    Jehan Akbar

  4. Department of Basic Sciences, College Preparatory Year, University of Ha’il, Ha’il, 2440, Kingdom of Saudi Arabia

    Muhammad Tauseef Qureshi, Mahmoud Al Elaimi & M. F. H. Abd El-Kader

  5. Bio Physics Department, Faculty of Science, Cairo University, Giza, Egypt

    Mahmoud Al Elaimi & M. F. H. Abd El-Kader

  6. Department of Physics, Abdul Wali Khan University Mardan, Mardan, Pakistan

    Muhammad Usman

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  1. Saeed Ullah
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Correspondence to Jehan Akbar.

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Ullah, S., Akbar, J., Qureshi, M.T. et al. Laguerre fields strength and beam waist-dependent superluminal propagation of light pulse in atomic medium. Eur. Phys. J. Plus 137, 963 (2022). https://doi.org/10.1140/epjp/s13360-022-03074-y

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