PBG properties of three-component 2D photonic crystals

Abstract

In this paper we analyze theoretically how the introduction of the third component into the twodimensional photonic crystal influences the photonic band structure and the density-of-states of the system. We consider the periodic array of cylindrical air rods in a dielectric, and the third medium is introduced as a ringshaped intermediate layer of thickness d and dielectric constant ε i between the air pores and the dielectric background. Using the plane wave method, we have obtained the band structures for the 2D triangular lattice photonic crystals. The dependencies of TE and TM band gaps' widths and gaps' edges position on the interlayer dielectric constant and interlayer thickness were analyzed. In the framework of this approach, we have estimated the influence of the surface oxide layer on the band structure of macroporous silicon. We observed the shift of the gaps' edges to the higher or lower frequencies, depending on the interlayer thickness and dielectric constant.We have shown that the existence of a native oxide surface layer should be taken into consideration to understand the optical properties of 2D photonic crystals, particularly in macroporous silicon structures.

Effective minority carrier lifetime and distribution of steady-state excess minority carriers in macroporous silicon

“…This determines optical, electrooptical and electrical characteristics of macroporous silicon structures [3][4][5]. In view of the potential barrier on a macropore surface, one should take into account recharging of the local surface centers at the energies below that of the indirect interband transition.…”

Influence of electron-phonon interaction on wannier–stark effect in macroporous silicon structures with SiO2 nanocoatings

“…This determines optical and electro-optical characteristics of macroporous silicon structures [3][4][5]. In view of the potential barrier on a macropore surface, one should take into account recharging of the local surface sites at energies below that of the indirect interband transition.…”

Quantum-sized effects in oxidized silicon structures with surface II-VI nanocrystals

“…Macroporous silicon is promising material for the development of 2D photonic structures with the required geometry and large effective surface [2,3]. It determines optical and electro-optical characteristics of macroporous silicon structures [4,5]. In [6,7], we investigated the near-IR light absorption oscillations in 2D macroporous silicon structures with surface II-VI nanocrystals and SiO 2 nanocoatings, taking into account the electrooptical Wannier-Stark effect within the strong electric field approximation.…”