Palmtop sensor for detection of viruses based on optical waveguide mode

We developed high sensitive sensor based on optical waveguide. It has been found that surface reaction on the SiO2 film where optical waveguide mode can be excited is detected. We developed a palmtop sensor for viruses based on the optical waveguide modes. In this article, it was introduced our effort how to reduce sensor size. Magnitude of electronic field in the waveguide mode structure was calculated as a first step in order to design the waveguide mode structure. Thermally oxidation of single crystalline silicon on SiO2 plate was employed to achieve the waveguide mode structure which was calculated. It was successful that three subtypes of influenza viruses A H3N2 and one H1N1 of influenza viruses can be distinguished. It was successfully achieved the proto-type palmtop sensor. It must be very useful against intrusion of infections, for example, in aircraft, at airports, and arenas in near future.