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Based on the phase-conjugate polarization interference between two one-photon processes, When the laser has broadband linewidth, the sum-frequency polarization beat (SFPB) signal shows the autocorrelation of SFPB exhibits hybrid radiation–matter detuning terahertz damping oscillation. As an attosecond ultrafast modulation process, it can be extended intrinsically to any sum-frequency of energy-levels...
The new fractional Fourier transform, proposed by Shih [Optics Comm. 118 (1995) 495], is shown to differ from the conventional fractional Fourier transform by its four periodic eigenvalues with respect to the order of Hermite-Gaussian functions. Simulations demonstrate that the Hermite-Gaussian superposition algorithm is still valid for this new transform. We also propose a general fractionalization...
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