Ultra-low spectral reflectances of inp mie resonators on an ingaas/inp focal plane array

Abstract

Numerical investigations of an InGaAs/InP focal plane array (FPA) integrated with periodic InP nanostructures are reported. It has been found that column-shape textured FPAs exhibit reflectances of ≤1% over the entire response range of 900 nm-1700 nm. Meanwhile, incident angle-dependent behaviors of the spectral reflectances have been observed. Numerical calculations reveal that such ultra-low reflection characteristics originate from the overlapping of the magnetic and the electric dipole resonances. The optimized structure design of InP nanosphere Mie resonators for minimum backscattering at different wavelengths is also applicable for nano-antennas, introducing a promising route to improve the performance of short wavelength infrared InGaAs FPAs.