Ab initiostudy of birefringent porous silicon

✍ Scribed by Bonder, Yuri ;Wang, Chumin

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 214 KB
• Volume: 202
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200461181

✦ Synopsis

Abstract

Optical properties of birefringent porous‐silicon layers are studied within the density functional theory. Starting from a (110)‐oriented supercell of 32 silicon atoms, elliptic columns of atoms in [100] and [010] directions are removed. The dangling bonds are saturated with hydrogen atoms. The results show an in‐plane anisotropy in the refractive index and in the absorption coefficient, i.e., a birefringence response. The difference Δ__n__ defined as $ n_{[1\bar 10]} $–$ n_{[001]} $ is compared with experimental data and a good agreement is observed. Also, the calculated absorption coefficients behave very closely to the measured ones. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)