Period Asymmetries in Particle Arrays for One-Way and Sector-Way Guiding

Yarden Mazor Y. Hadad Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas, USA Ben Z. Steinberg School of Electric Engineering, Tel Aviv University, Tel Aviv, Israel

A general theory for one-way optical guiding in periodic particle arrays is developed. Conditions on the asymmetry properties of the structure’s period that are necessary to obtain asymmetric dispersion are derived. The two-type rotation principle, presented and studied in previous works on one-way guiding in particle chains, is viewed as a special design that achieves the necessary violation of the period’s symmetries. The recently suggested sector-way metasurfaces are also addressed in the present context. Examples of periodic strips and surfaces that consist of circular particles and support one way and sector-way guiding, are provided.

yardenm2@mail.tau.ac.il