Production and propagation of nonparaxial self-accelerating beams through a four-level electromagnetically induced transparency system

摘要: Abstract We propose the feasibility of realizing loss-proof accelerating beams in a N-type four-level atomic vapor based on electromagnetically induced transparency (EIT). The generated EIT will overcome large absorption that can produce robust nonparaxial self-accelerating beams. These beams, as eigenmodes Helmholtz equation media, accelerate along circular trajectory with beam shape preserved. While such not exist beyond due to fact compensation for demands energy transfer from oscillating tail main lobe region, which damage beam. results indicate an open new window generation that, return, may ideas investigate media and atomic-like ensembles.