Real-time functionalization and biosensing in subwavelength grating bimodal waveguides

Abstract

[EN] In this paper, we present for the first time experimental results of biosensing processes by using subwavelength grating bimodal waveguides as a refractive index sensors. We demonstrate the detection of 10ppm concentration of Bovine Serum Albumin (BSA) with a 190pm wavelength shift after a functionalization of the sensor surface with a layer of protein A/G in a continuous flowing system. Real-time data of each step is obtained, validating these kind of novel and highly sensitive SWG sensors for biosensing purposes.