CAJ | 학술논문

用密度矩阵理论分析了在超快脉冲及太赫兹场作用下GaAs量子阱和双量子阱的光吸收谱.分析表明：在直流和太赫兹场作用下,由于量子约束斯塔克效应,光吸收谱呈现出多个激子吸收峰.改变太赫兹的强度和频率,吸收谱出现恶歇分裂,并产生边带,这些分裂主要来源于太赫兹作用下激子的非线性效应.
용밀도구진이론분석료재초쾌맥충급태혁자장작용하GaAs양자정화쌍양자정적광흡수보.분석표명：재직류화태혁자장작용하,유우양자약속사탑극효응,광흡수보정현출다개격자흡수봉.개변태혁자적강도화빈솔,흡수보출현악헐분렬,병산생변대,저사분렬주요래원우태혁자작용하격자적비선성효응.
The optical absorption spectra in quantum well driven by both an intense growth-direction-oriented terahertz（THz） and an optical pulse are calculated within the theory of density matrix.It is shown that the electric field produces multiple absorption peaks which come from the quantum confined Stark effect.Much rich optical absorption spectra and the excitonic peak spiting show up when changing the THz field intensity.The Autler-Towns splitting results from the THz nonlinear dynamics of confined excitons and result in the band side generation.