Pressure sensor using Nano-opto-mechanical Systems (NOMS)

This paper presents a pressure sensor array based on optical force using Nano-opto-mechanical Systems (NOMS). It consists of a deformable diaphragm and a waveguide array. When pressure is applied on the diaphragm, the gap between the diaphragm and the waveguide is reduced. The induced optical force deforms the waveguide and change the optical loss. In the experiment, it measures up to 32 dB optical output modulation when the pressure is changed from 0 kPa to 250 kPa. The proposed waveguide pressure sensor array has advantages such as high sensitivity (0.128 dB/kPa) and feasibility of mapping the pressure distributions, which result in potential applications such as microphone acoustics sensors and bio-medical sensors.