Analysis of transport properties of five-terminal beam splitter using anisotropy of the group velocity.

This paper proposes a beam splitter with one emitter and two collectors each on the left and right based on anisotropy of the group velocity. An anisotropic medium is represented by a two-dimensional square lattice tight-binding model. The transport property of the beam splitter is analyzed by means of the boundary-type solution method. At the center of the band where the anisotropy of the group velocity is strong, the incident beam is split into two and propagates along the diagonal directions of the square lattice with almost no diffraction. (C) 2002 Wiley Periodicals, Inc.