Advances in Optical Technologies / 2008 / Article / Fig 5

Research Article

Silicon Photonic Biosensors for Lab-on-a-Chip Applications

Figure 5

Schematic view of the bimodal waveguide sensor device. The modes are propagating with different velocities. The interference pattern, created at the exit and projected onto a two-sectional photodetector (TSP), varies as a function of the refractive index of the cladding layer.