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Nonparaxial Propagation of Rotating Cosh-Gaussian Beams
Dongmei Deng,Xi Peng,Chidao Chen,Bo Chen,Yulian Peng,Meiling Zhou 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.5
Starting from the inhomogeneous Helmholtz equation, we obtain the exact rotating Cosh-Gaussian vector potential solution oriented along the propagation axis (i.e., the z axis). The electricand the magnetic fields are both expressed in terms of rotating Cosh-Gaussian beams (RCGBs) thatare rigorous solutions to Maxwell’s equations. The paraxial and the nonparaxial RCGBs have aninherent rotating property in that the angular velocity decreases with increasing the propagationdistance. The evolution of the Poynting vector of the RCGBs is analyzed as they propagate in freespace.