Photonic crystal fibers based biosensors
Non-labeled optical biosensing has come to commercial fruition in various forms such as surface plasma resonance, resonating mirrors and grating couplers. These techniques all rely on sensing changes in the evanescent field. Consequently, those changes are small and a lot of care must be taken to improve the sensitivity and the signal to noise ratio of the biosensor. Our research focuses on the investigation of an integrated optical biosensor for label-free detection of biomolecules using hollow-core photonic crystal fibres (PCF). In hollow-core PCFs, the main mode, rather than the evanescent field, interacts with the biomolecules, and a more pronounced spectral variation is obtained. Our efforts to-date have focused on investigating a robust technique to fill hollow core photonic crystal fibers.