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Few-cycle two-frequency light bullets with detuning of phase and group velocities
- Authors: Kalinovich А.А.1, Koshkin K.V.1, Komissarova M.V.1
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Affiliations:
- Lomonosov Moscow State University
- Issue: Vol 88, No 12 (2024)
- Pages: 1881-1886
- Section: Nanooptics, photonics and coherent spectroscopy
- URL: https://journals.rcsi.science/0367-6765/article/view/286470
- DOI: https://doi.org/10.31857/S0367676524120067
- EDN: https://elibrary.ru/EXDEAB
- ID: 286470
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Abstract
Using numerical modeling, the possibility of forming (2D+1) short-period (3—5 oscillations under the envelope) light bullets in non-centrosymmetric media with the second harmonic at the presence of phase and group velocities mismatches is shown. It is demonstrated that cubic nonlinearity does not prevent the formation of space-time solitons only up to certain intensity values.
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About the authors
А. А. Kalinovich
Lomonosov Moscow State University
Author for correspondence.
Email: koshkin.kv19@physics.msu.ru
Russian Federation, Moscow
K. V. Koshkin
Lomonosov Moscow State University
Email: koshkin.kv19@physics.msu.ru
Russian Federation, Moscow
M. V. Komissarova
Lomonosov Moscow State University
Email: koshkin.kv19@physics.msu.ru
Russian Federation, Moscow
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Fig. 1. Dependences of the peak intensities of the signal at the fundamental frequency │ψ1│2 on the longitudinal coordinate z (a) at N=10, Dβ1 = −0.1, Dβ2 = −0.2, Dc1 = 0.1, Dc2 = 0.01, Db1 = 0.1, Db2 = 0.05, δ = 0 and different values of the dimensionless phase detuning: Δk = 0.5, Δk = 0.6 (dashed line), Δk = 0.7 (short dotted line), Δk = 0.9 (dotted line). Dependences of the peak signal intensities at the fundamental and double frequencies │ψ1,2│2 on the longitudinal coordinate z (b) for N=5, Dβ1 = −0.1, Dβ2 = −0.2, Dγ1 = 0.02, Dγ2 = 0.04, Dc1 = 0.1, Dc2 = 0.02, Db1 = 0.2, Db2 = 0.1, δ = Δk = 0.25 (solid), δ = Δk = 0.28 (dashed).
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Fig. 2. Dependences of the peak intensities of the signal at the fundamental frequency │ψ1│2 on the longitudinal coordinate z (a) at N=3, Dβ1 = −0.1, Dβ2 = −0.2, Dc1 = 0.1, Dc2 = 0.0333, Db1 = 0.333, Db2 = 0.166, δ = Δk and different values of the dimensionless phase detuning: Δk = 0.1 (solid), Δk = 0.2 (dashed), Δk = 0.25 (short dotted line). Dependences of the peak signal intensities at the fundamental frequency │ψ1│2 on the longitudinal coordinate z (b) for N=5, Dβ1 = −0.1, Dβ2 = 0, Dc1 = 0.1, Dc2 = 0.02, Db1 = 0.2, Db2 = 0.1, δ = 0.1 and different values of the dimensionless phase detuning: Δk = 0 (solid), Δk = 0.1 (dashed), Δk = 0.25 (short dashed).
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Fig. 3. Dependences of the peak signal intensities at the fundamental and doubled frequencies │ψ1,2│2 on the longitudinal coordinate z in the presence of cubic nonlinearity (a), N=5, Dβ1 = −0.1, Dβ2 = −0.2, Dc1 = 0.1, Dc2 = 0.02, Db1 = 0.2, Db2 = 0.1, D11 = 0.1, δ = Δk = 0.1. Dependences of the peak signal intensities at the fundamental and doubled frequencies │ψ1,2│2 on the longitudinal coordinate z (b) for N=5, Dβ1 = −0.1, Dβ2 = −0.2, Dc1 = 0.1, Dc2 = 0.02, Db1 = 0.2, Db2 = 0.1, δ = Δk and different values of the dimensionless phase detuning: Δk = 0.2 (solid), Δk = 0.3 (dashed).
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5.
Fig. 4. Dependences of the peak signal intensities (N=5) at the fundamental and doubled frequencies │ψ1,2│2 on the longitudinal coordinate z in the presence of cubic nonlinearity (a), Dβ1 = −0.1, Dβ2 = −0.2, Dc1 = 0.1, Dc2 = 0.02, Db1 = 0.2, Db2 = 0.1, δ = Δk = 0.1, D11 = 0.1 (dashed line), D11 = 0 (solid line). Dependences of the peak signal intensities (N = 5) at the fundamental and doubled frequencies │ψ1,2│2 on the longitudinal coordinate z in the presence of cubic nonlinearity (b), Dβ1 = −0.1, Dβ2 = −0.2, Dc1 = 0.1, Dc2 = 0.02, Db1 = 0.2, Db2 = 0.1, δ = Δk = 0.1, D11 = 0.25 (dashed line), D11 = 0.15 (solid line).
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