Design of the microstructured optical fiber-based surface plasmon resonance sensors with enhanced microfluidics

Abstract

The concept of a Microstructured Optical Fiber-based Surface Plasmon Resonance sensor with optimized microfluidics is proposed. In such a sensor plasmons on the inner surface of large metallized channels containing analyte can be excited by a fundamental mode of a single mode microstructured fiber. Phase matching between plasmon and a core mode can be enforced by introducing air filled microstructure into the fiber core, thus allowing tuning of the modal refractive index and its matching with that of a plasmon. Integration of large size microfluidic channels for efficient analyte flow together with a single mode waveguide of designable effective refractive index is attractive for the development of integrated highly sensitive MOF-SPR sensors operating at any designable wavelength.

A Novel Compact Photonic Crystal Fibre Surface Plasmon Resonance Biosensor for an Aqueous Environment

“…2 that there is a corresponding shift (dashed curves) in the resonant attenuation peaks. This transduction mechanism is commonly used for detecting the bulk analyte refractive index changes, as www.intechopen.com well as monitoring formation of the nanometer-thin biolayers on top of a metallized sensor surface (Hassani and Skorobogatiy 2006). In this particular design, there is considerably more field penetration into the analyte-filled channels for the first plasmonic peak as compared to that of the second.…”

“…It will be shown that the proposed PCF SPR sensor can be optimised to achieve a sensitivity of 4000 nm/RIU with regards to spectral interrogation, which is much higher than the 1000 nm/RIU and 3000 nm/RIU reported by (Hautakorpi, Mattinen, and Ludvigsen 2008) and (Hassani and Skorobogatiy 2006) respectively.…”

“…This has resulted in the proposal of many types of PCF and micro structured optical fiber (MOF) SPR biosensors, some of which include a three-hole MOF SPR biosensor with a gold layer deposited on the holes, PCF SPR biosensor with enhanced micro fluids and photonic bandgap SPR biosensors (Gauvreau et al 2007;Hassani et al 2008;Hassani and Skorobogatiy 2006;Hautakorpi, Mattinen, and Ludvigsen 2008). PCFs are thin silica glass fibers possessing a regular array of microscopic www.intechopen.com holes that extend along the whole fiber length (Ferrando et al 2000).…”

Advances in optical fiber Bragg grating sensor technologies

“…The unique holey cladding structure offers marvellous benefits as liquid or gas cells, because of which MOFs provide an ideal platform for light-matter interaction and sensing applications [23][24][25][26].…”

Optical Fiber Interferometers and Their Applications

“…The silica core single mode PCF bandwidth is more than one thousand nanometer which is much greater than those of an air core PCF fiber. A nano layer of rare metal coating on the surface of core and voids causes Plasmon-light interaction in PCF and extremely enhances the interferometer sensitivity (Hassani & Skorobogatiy, 2006). However the compact simple modal fiber interferometers depending on the fiber type such as Panda or birefringent PCF, can be employed in long lengths and short lengths applications (Villatoro et al, 2006).…”