Diffraction from grating surfaces of a negative index metamaterial

Min Cheng; Yingwu Zhou; Yuliang Li; Xiyao Chen; Xuemei Li; Qinxuan Huang

doi:10.1117/12.756113

4 January 2008 Diffraction from grating surfaces of a negative index metamaterial

Min Cheng, Yingwu Zhou, Yuliang Li, Xiyao Chen, Xuemei Li, Qinxuan Huang

Proceedings Volume 6832, Holography and Diffractive Optics III; 68321W (2008) https://doi.org/10.1117/12.756113
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

We discuss the diffraction of waves due to the periodically corrugated boundary of vacuum and a linear, homogeneous negative refraction index metamaterials (NIM). We show by numerical simulation that the grating surfaces can give rise to a well-defined diffracted beam in addition to the negatively refracted beam. The direction of the diffracted beam is consistent with elementary diffraction theory; however, the coupling to this higher order beam is much larger than would be the case for a positive index material (PIM). To explore the properties of diffracted beams in a negative-index sample, we simulate a wave incident on the interface between a NIM grating and free space. The numerical study provides an indication of the relative coupling of the incident wave to the zeroth and first order beams.

Citation Download Citation

Min Cheng, Yingwu Zhou, Yuliang Li, Xiyao Chen, Xuemei Li, and Qinxuan Huang "Diffraction from grating surfaces of a negative index metamaterial", Proc. SPIE 6832, Holography and Diffractive Optics III, 68321W (4 January 2008); https://doi.org/10.1117/12.756113

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