Lanlan ZHANG^*, Qi LI, and Qi WANG

National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China

(Received August 9, 2011; Accepted May 21, 2012)

We propose a novel directional emitter for achieving highly efficient beaming of self-collimated light from two-dimensional photonic crystal (PC). The structure is composed of a two-dimensional (2D) photonic crystal and two-layer dielectric rods. The finite-difference time-domain (FDTD) simulations show that the emission properties are sensitive to the distance between photonic crystal and two-layer dielectric rods. By adjusting the relative position of the two-layer dielectric rods, highly efficient beaming emission can be realized.

Key words: photonic crystals, directional emitter, self-collimate

^*E-mail address: llzhang2009@yahoo.com.cn