Characteristics of amplitude modulation cantilever sensor with optical waveguide in liquid

We present the basic characteristics of amplitude modulation cantilever with optical waveguide in liquid. This optical waveguide cantilever-based transducer can be used for small particle detection or biological sensing in liquid environments. Essentially, the SiON waveguide embedded in the SiO 2 cantilever is designed and fabricated to detect the biomolecular interaction or small particle in the liquid. For a measurement, the actuation based on amplitude modulation is applied for a stable oscillation of the cantilever in liquid environment. Finally, modulated output signal of optical waveguide cantilever were measured and analyzed.