Interference resonant propagation and spectral properties of two-colour femtosecond Gaussian pulses in three-level Λ-type atomic medium

Wang, Zhendong; T, Liu; Ma, Jing; Xiao, Jing

doi:10.1016/j.optcom.2014.05.031

Cited by 4 publications

(2 citation statements)

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“…With the rapid development in ultrafast laser technology [1,2], it has become more attractive to extend the study of the interaction between matter and light into extreme nonlinear regime [3]. The fundamental problem in this field is the interaction of few-cycle pulses with resonant twolevel atomic (TLA) ensembles, which lays the foundation for understanding the more complex cases, such as the quantum dot ensembles [4], three-level atoms [5], and specifically designed structures [6].…”

Section: Introductionmentioning

confidence: 99%

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Doppler effects in the propagation of a few-cycle pulse through a dense medium

2015

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This numerical study demonstrates that Doppler redshift exists in the reflected spectrum of a few-cycle pulse, propagating through a dense medium. It manifests itself in two different forms, a sharp low-frequency spike (LFS) located at the red edge of the reflected spectrum and a relatively broader redshift near the carrier frequency. With the variation of the laser and medium parameters, the dominant reflection mechanism changes between bulk generation of backwards propagation waves and nonlinear reflection near the front face. This leads to the manifestation of Doppler effect changing accordingly between the two different forms. This study unifies the physical mechanism behind the LFS and dynamic nonlinear optical skin effect, which enriches the theoretical explanation of the spectral redshift of few-cycle pulse propagation beyond the intrapulse four-wave mixing.

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Section: Introductionmentioning

confidence: 99%

“…The transmitted spectrum of few-cycle pulses propagating in vacuum to a TLA material has been studied extensively by the previous works [4][5][6][7]. However, few studies have investigated the reflected spectrum.…”

Section: Introductionmentioning

confidence: 99%