Design of a Silicon Overlay Glass Waveguide Sensor

• 作者: Kristian E. Medri Robert C. Gauthier
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 医学
• 关键词: Refractive Index SENSOR SLAB WAVEGUIDE Patterned High Dielectric OVERLAY FDTD Integrated Optics
• 年，卷（期）: 2011,（4）
• 页码范围: 151-154
• 页数: 4页
• 分类号: R73

摘要

A glass based slab waveguide, coated with a thin patterned high dielectric overlay, is configured into a refractive index sensor. The asymmetric nature of the waveguide configuration is exploited by keeping the mode in the slab waveguide while enhancing the field level in the overlay-superstrate. The sensor's response is examined using the FDTD simulation technique. A sensitivity of up to one part in 105 in the index of refraction discrimination is determined. The nature of the sensor ensures optical fibre compatibility, requires sub-μL sample volumes and provides a high resolution.