Efficient method of moments analysis of an infinite array of triangular nanoclusters in the optical frequency range

This paper provides an efficient Method-of-Moments solution for an infinite doubly periodic array of magnetic nanoclusters. Multiple-scattering based Macro Basis Function approach is employed to obtain a reduced representation of equivalent current distributions. The incomplete QR algorithm is exploited to reduce the computation time and memory required to solve the reduced system of equations. The accuracy and efficiency of the combined approach are investigated for an infinite doubly periodic array of magnetic nanoclusters composed of eight silver triangular particles at optical frequencies.