Nonlinear absorption of femtosecond light pulses in bulk crystals under interband multiphoton resonance conditions

15th Russian Youth Conference on Physics and Astronomy

物理学;天文学

Perlin, E.Yu.^1,2 ; Eliseev, K.A.^1 ; Idrisov, E.G.^1,2 ; Khalilov, Ya.T.^2

St. Petersburg State University of Information Technologies, Mechanics and Optics, Informational Optical Technologies Center, St.-Petersburg, 199034, Russia^1

Department of Physics and Mechanics, St. Petersburg State Polytechnic University, St.-Petersburg, 195251, Russia^2

关键词: Femtosecond light pulse;    Femtosecond regimes;    Inter-band transition;    Low dimensional structure;    Multiphoton resonances;    Nonlinear absorptions;    Pump-probe spectroscopy;    Two-photon resonance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/461/1/012002/pdf
DOI  :  10.1088/1742-6596/461/1/012002

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

A theory of the nonsteady-state absorption of supershort light pulses in bulk materials and heterostructures with quantum wells and wires when multiphoton resonance at interband transitions occurs is developed.The absorbed energy dependence on the detunings of the multiphoton resonance and on the pulse width is investigated. The interaction between two consecutive short pulses (pump-probe spectroscopy within the femtosecond regime) with bulk crystals and low-dimensional structures under the conditions of two-photon resonance at interband transitions and transitions between size-quantized sublevels is studied.