Wannier–Stark electro-optical effect and photonic modes in 2D macroporous silicon structures with SiO₂ nanocoatings

Abstract

We have investigated the IR light absorption oscillations in 2D macroporous silicon structures with SiO₂ nanocoatings, taking into account the Wannier–Stark electrooptical effect caused by a strong electric field on the Si-SiO₂ boundary and an additional electric field of quasi-guided optical modes. The photonic modes and band gaps were also considered as peculiarities in absorbance spectra of macroporous silicon structures with a thick SiO₂ nanocoating. The photonic modes do not coincide with the quasiguided modes in the silicon matrix.