TY - JOUR

T1 - Dynamics of Atomic Population Gratings in Collisions of Unipolar Light Pulses in a Multilevel Resonant Medium

AU - Arkhipov, R.M.

N1 - Export Date: 4 November 2024 Сведения о финансировании: Ioffe Institute Сведения о финансировании: Russian Science Foundation, RSF, 23-12-00012 Сведения о финансировании: Russian Science Foundation, RSF Текст о финансировании 1: The work was supported by the Russian Science Foundation [scientific project no. 23-12-00012 (numerical calculations, Sections 4 and 5)] and the State Assignment of the Ioffe Institute [topic 0040-2019-0017 (analytical results, Section 2)].

PY - 2024/10/1

Y1 - 2024/10/1

N2 - Abstract: We report an analytical and numerical study of the dynamics of electromagnetically induced atomic population gratings during collisions of a sequence of unipolar pulses of unusual temporal shape (rectangular and triangular) in a multilevel resonant medium. The possibility of forming dynamic microcavities with Bragg-like mirrors, the shape of which is different at each resonant transition of the medium, is demonstrated. A simple analytical description of such microresonators is proposed based on an approximate solution of the time-dependent Schrödinger equation when the amplitude of the exciting pulses is small. In the case of high-power pulses, when perturbation theory is not applicable, the results of numerical calculations show the disappearance of microcavities and the emergence of nonharmonic gratings with an increase in the number of collisions between pulses. The studied phenomena demonstrate a possibility of using unipolar pulses of an unusual shape for ultrafast control of the medium properties. © Allerton Press, Inc. 2024. ISSN 1068-3356, Bulletin of the Lebedev Physics Institute, 2024, Vol. 51, Suppl. 5, pp. S365–S373. Allerton Press, Inc., 2024. Russian Text The Author(s), 2024, published in Kvantovaya Elektronika, 2024, Vol. 54, No. 2, pp. 77–83.

AB - Abstract: We report an analytical and numerical study of the dynamics of electromagnetically induced atomic population gratings during collisions of a sequence of unipolar pulses of unusual temporal shape (rectangular and triangular) in a multilevel resonant medium. The possibility of forming dynamic microcavities with Bragg-like mirrors, the shape of which is different at each resonant transition of the medium, is demonstrated. A simple analytical description of such microresonators is proposed based on an approximate solution of the time-dependent Schrödinger equation when the amplitude of the exciting pulses is small. In the case of high-power pulses, when perturbation theory is not applicable, the results of numerical calculations show the disappearance of microcavities and the emergence of nonharmonic gratings with an increase in the number of collisions between pulses. The studied phenomena demonstrate a possibility of using unipolar pulses of an unusual shape for ultrafast control of the medium properties. © Allerton Press, Inc. 2024. ISSN 1068-3356, Bulletin of the Lebedev Physics Institute, 2024, Vol. 51, Suppl. 5, pp. S365–S373. Allerton Press, Inc., 2024. Russian Text The Author(s), 2024, published in Kvantovaya Elektronika, 2024, Vol. 54, No. 2, pp. 77–83.

KW - attosecond pulses

KW - coherent effects

KW - dynamic cavities

KW - femtosecond pulses

KW - population difference gratings

KW - rectangular pulses

KW - subcycle pulses

KW - triangular pulses

KW - unipolar pulses

UR - https://www.mendeley.com/catalogue/43ddd9a3-1c4f-3ef1-93d0-b3c74ec554bb/

U2 - 10.3103/s1068335624601407

DO - 10.3103/s1068335624601407

M3 - статья

VL - 51

SP - S365-S373

JO - Bulletin of the Lebedev Physics Institute

JF - Bulletin of the Lebedev Physics Institute

SN - 1068-3356

IS - Suppl 5

ER -