Abstract

Investigation on the phase shifts of higher-order reflected light from a two-dimensional photonic crystal (PC) demonstrates that the phase shift of $-m\text{th}$ order reflected light is symmetric with respect to the line of $k_x=m\pi ∕b$ in the frequency-wave vector domain, where $k_x$ and b denote the incident wave vector component along the surface and the period of the PC along the surface, respectively, and m is an integer. Such phase symmetry originates from the periodicity of a PC along the surface. When higher-order propagating waves appear between two band edges of a stop band, the phase change of the 0th order reflection is generally not π as reported before. Moreover, the reflection phase can be adjusted and designed by changing the cylinder radii of the surface layer. It provides a robust way to achieve a giant Goos–Hänchen shift, which is described in detail as an example, and superluminal propagation from a PC.

© 2010 Optical Society of America

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