Light dependence of SOI MOSFET with nonuniform doping profile

The light dependence of a fully depleted short channel silicon-on-insulator (SOI) MOSFET is investigated. As the photon flux density increases, there is a lowering in the surface potential barrier called the photon induced barrier lowering (PIBL). The threshold voltage shows a logarithmic reduction with the increase in the incident flux density. The drain source current and the transconductance significantly increase under the incident optical flux density. The device will be useful for high speed application in optical systems.