Spectral shift of a twisted electromagnetic Gaussian Schell-model beam focused by a thin lens
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- Zhu, S. & Cai, Y. Appl. Phys. B (2010) 99: 317. doi:10.1007/s00340-010-3906-0
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Spectral changes of a twisted electromagnetic Gaussian Schell-model (EGSM) beam focused by a thin lens are investigated by using a tensor method. It is shown that the spectral shift is mainly determined by the degree of polarization, twist phase and correlation coefficients of the initial beam. Generically the blue shift occurs at on-axis points, while the red shift can occur at off-axis points.