Silicon photonic wire biosensor array for multiplexed real-time and label-free molecular detection

Label-free biosensor array based on silicon-on-insulator ring resonators addressed using a WDM approach

“…Label-free evanescent field sensors made of siliconon-insulator (SOI) photonic waveguides with submicrometer dimensions have seen rapid development in recent years [1][2][3][4][5]. Because of the high refractive index of silicon, the optical modal field is strongly localized near the waveguide surface, resulting in a high response to surface perturbations, particularly when operating in the TM mode [2].…”

“…Several groups have investigated sensor arrays with the sensing elements addressed using power splitting, where multiple outputs are captured with an imaging system [1,3,5]. Imaging systems are comparatively costly and have limited data acquisition speed [5] unless sophisticated instrumentation is employed [3].…”

Chemical Sensors Based on Photonic Structures

“…PDMS has been used as sensor cladding in order to enable sensing of BTEX (Benzene, Toluene, Ethylbenzene, Xylenes) volatile organic compound. In addition, a surface mass coverage of 0.3 pg/mm 2 can be detected with a silicon photonic wire MZI sensor array, with integrated SU-8 micro-fluidic channel (Densmore et al, 2009). In conclusion, the principal penalty of using MZI photonic sensors is represented by the cosine-dependent intensity function.…”

Real-time observation of antigen–antibody association using a low-cost biosensing system based on photonic bandgap structures

“…However, the large footprint of these structures significantly limits the integration level of the final device. This issue can be overcome by folding the waveguides as in [11].…”