Optical Beams in Media with Spatial Dispersion
GUO Qi
Institute of Quantum Electronics, South China Normal University, Guangzhou 510631
Optical Beams in Media with Spatial Dispersion
GUO Qi
Institute of Quantum Electronics, South China Normal University, Guangzhou 510631
关键词 ：
42.25.Bs ,
71.35.Cc ,
71.35.-y
Abstract ： We theoretically predict a novel phenomenon of the diffraction-free propagation of the paraxial optical beam in the isotropic or cubic linear medium with spatial dispersion. Under the weak spatial dispersion condition, the paraxial wave equation is derived, in which there is the diffraction term with the coefficient G that depends on the compensation between the classic diffraction and spatial dispersion. Near the exciton dipole absorption line, we can have Γ = 0, then the beam propagates diffraction-freely, and its shape keeps unchangeable. Discussed are also the physical mechanism and the possible experimental candidates of crystals for the phenomenon.
Key words ：
42.25.Bs
71.35.Cc
71.35.-y
出版日期: 2003-01-01
:
42.25.Bs
(Wave propagation, transmission and absorption)
71.35.Cc
(Intrinsic properties of excitons; optical absorption spectra)
71.35.-y
(Excitons and related phenomena)
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2003, Vol. 20 
