Photonic crystals composed of β-FeSi2 with amorphous Si cladding layers. (27th April 2015)

• Record Type: Journal Article
• Authors: Tokushige, Hiroki; Endo, Takashi; Hiidome, Keita; Saiki, Kenta; Kitamura, Shigehiro; Katsuyama, Toshio; Ikeda, Naoki; Sugimoto, Yoshimasa; Maeda, Yoshihito
• Is Part Of: Japanese journal of applied physics. Volume 57:Number 7(2018)Supplement 2
• Publication Date: 2015-04-27
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.54.07JB03
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: Photonic crystals (PhCs) composed of β-FeSi2 with amorphous Si (a-Si) cladding layers are systematically studied to realize silicon photonics devices incorporating Si-based light-emitting layers. The bandgap characteristics of two types of triangular-lattice-type PhC in the telecommunication wavelength region of approximately 1.55 µm are calculated. They are composed of a-Si circular holes surrounded by β-FeSi2 (hole type) and β-FeSi2 circular columns surrounded by a-Si (column type). As a result, the bandgap for the hole-type PhC is obtained for TE polarization, while that for the column-type PhC is obtained for TM polarization. Furthermore, the PhC lattice constant range giving a bandgap for the column-type PhC is much wider than that for the hole-type PhC. The column-type PhC can be easily fabricated compared with the hole-type PhC. Thus, the column-type PhC is useful for actual applications from the viewpoint of fabrication and the bandgap characteristics themselves.