Reflection and transmission of Gaussian beam from a uniaxial crystal slabYan Wang1, Ke Yu1, Xuejun Zha2, Jiwei Xu1 and Jinkui Yan3
1 Department of Physics, Shanghai University - Shanghai 200444, PRC
2 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences - Shanghai 201800, PRC
3 Department of Communication Engineering, Shanghai University Shanghai 200072, PRC
received 6 June 2006; accepted 3 July 2007
published online 19 July 2006
We investigate the characteristics of Gaussian beams reflected and transmitted from a uniaxial crystal slab with an arbitrary orientation of its optical axis. The formulas of the total electric and magnetic fields inside and outside the slab are derived by use of Maxwell's equations and by matching the boundary conditions at the interfaces. Numerical simulations are presented and the field values as well as the power densities are computed. Negative refractions are demonstrated when the beam is transmitted through a uniaxial crystal slab. Beam splitting of the reflected beam is observed and is explained by the resonant transmission for plane waves. Dependences of the lateral shift on the incident angle and beam width are discussed. Negative and positive lateral shifts are observed due to the spatial anisotropic properties.
42.25.Gy - Edge and boundary effects; reflection and refraction.
41.85.-p - Beam optics.
41.20.-q - Applied classical electromagnetism.
© EDP Sciences 2006