الفهرس | Only 14 pages are availabe for public view |
Abstract For the last couple of decades, tremendous research has been conducted in the development of inexpensive, accurate, and reliable biomedical sensors capable of measuring extremely low concentrations of analytes. Numerous sensors have been created and manufactured to control and detect various diseases using several technologies. Among these technologies, photonic crystals (PhC) have become more popular due to their promising characteristics, such as their ultra-compact size, minimal sample requirement, excellent measurement sensitivity, flexibility in structural design, and integration capability. Additionally, PhC can inherit excellent optical features, such as safety in a flammable, explosive environment, immunity to electromagnetic interference, long-range monitoring, and rapid response speed. Previous merits make PhC one of the most attractive optical data processing platforms. Many types of PhC-based sensors are presented, such as high-temperature sensors, gas sensors, force strain sensors, displacement sensors, liquid sensors, and biomedical sensors. This thesis addresses enhancing the performance of different biomedical sensors based on 2D PhC. The proposed biomedical sensors are designed, simulated, and evaluated. There are two kinds of sensors that can be designed and fabricated using PhC: on-chip PhC technology and photonic crystal fiber (PCF) technology. The work in this thesis can be divided into five main proposals. The First, second, and the fifth proposals are based on the on-chip PhC technology, and the third and fourth proposed parts are based on the PCF technology. The First proposal presents a biomedical PhC on-chip-based sensor that can detect and distinguish accurately between normal and abnormal brain tissues. The abnormal ones consist of lesions, tumors, and cancerous tissues. The designed sensor detects these types with acceptable sensitivity and high-quality factor compared with other photonic-based detecting techniques. The proposed sensor exhibits the highest sensitivity of 1332 nm/RIU, an ultra-high quality factor of 16254, and a very low-level detection limit of 9.08×10-6. The Second proposal presents a biomedical 2D PhC on-chip-based sensor that can accurately diagnose and differentiate between regular and irregular types of |