阿秒和频相位共轭极化拍频的不对称色锁二阶相干控制

Asymmetric Second-Order Color-Locking Coherent Control of Phase-Conjugated Attosecond Sum-Frequency Polarization Beats

研究了级联三能级系统中孪生色锁随机光场的相位共轭阿秒和频极化拍频(ASPB)不对称新效应。从理论上分析了自关联单光子简并四波混频(DFWM)和双光子非简并四波混频(NDFWM)信号辐射场与物质间不对等效应、混合型太赫兹失谐振荡特性,及双光子非简并共振四波混频信号的延时不对称性;同时也分析了由干涉计两臂不平衡色散效应引起的阿秒和频极化拍频信号的延时不对称性,即阿秒和频极化拍频信号的最大值相对于零延时有一个小偏移,结果表明该不对称性并这不影响阿秒和频极化拍频零差探测两偶极禁戒跃迁能级分裂的总体精度。阿秒和频极化拍频作为一种消除多普勒增宽的超快调制过程,从理论上说它可以扩展到任何两偶极禁戒跃迁能级系统。

The new effects of phase-conjugation asymmetric attosecond sum-frequency polarization beat （ASPB） of twin composite color-locking stochastic fields in cascade three-level system are investigated. The radiation fieldmatter asymmetric effects and hybrid detuning terahertz oscillation property of self-correlation single-photon degenerate four-wave mixing signal （DFWM） and two-photon nondegenerate four-wave mixing signal （NDFWM）, and time-delay asymmetry of two-photon non-degenerate resonant four-wave mixing theoretically are analyzed; the time-delay asymmetry of polarization beat signal caused by the unbalanced dispersion effects between the two arms of Michelson interferometer, which is the phenomenon that the maximum of the polarization beat signal shifts from zero time delay, is also studied. But this asymmetry does not affect the total precision of homodyne detected ASPB signal when detecting the energy-splitting of two transition-forbidden excited states. As a Doppler-free attosecond ultrafast coherent modulation process, ASPB can be intrinsically extended to any two dipolar forbidden energy-level systems.