Optimization of waveguide structure for local evanescent field shift detection

Autor: Kevin L. Lear, Rashid Safaisini, Zhangjing Yi, Tim A. Erickson, Rongjin Yan
Rok vydání: 2011
Předmět:
Zdroj: Integrated Optics: Devices, Materials, and Technologies XV.
ISSN: 0277-786X
DOI: 10.1117/12.875962
Popis: The waveguide structure for the local evanescent array coupled (LEAC) biosensor is optimized theoretically with Beam Propagation Method (BPM) simulations. The LEAC biosensor has successfully demonstrated experimental results of a sensitivity of 16% /nm and a metrology limit of 14 pm. Considering the waveguide thickness detector position used in previous experiments are far from optimized values, the detection performance of the LEAC sensor can be significantly improved with the simulated optimal structure. With the optimized parameters, when the upper cladding is air the estimated metrology limit is 0.8 pm; with water as the upper cladding for real-time measurements in an intigrated microfluidic channel, the estimated metrology limit is 1.6 pm.
Databáze: OpenAIRE