Optical Isolation by Time-Dependent Sinusoidal-Shaped Structures

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（9）
• 页码范围: 61-64
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/9/094202

摘要

Design of nonmagnetic optical isolators integrated with silicon waveguides is important for rapidly growing silicon photonics in optical communications.We introduce a silicon waveguide consisting of an array of complex sinusoidal-shaped structures that create the designed time-dependent modulation of refractive indices.These time-dependent sinusoidal-shaped structures are engineered to have in-phase mode conversion only in one direction,thus leading to asymmetric optical mode conversion in the silicon waveguide and one-way light transmission with high contrast ratios,confirmed by numerically simulated field maps and calculated transmission at the wavelength of 1550nm.Our design may offer another practical design to the compact chip-scale optical isolators in silicon waveguides.