Bolometric detector embedded in a polycrystalline diamond grown by chemical vapor deposition

A fast bolometric detector embedded in a plate of chemical-vapor-deposited polycrystalline diamond was developed and fabricated. The working element of the bolometer is a buried graphitized layer ( with temperature-sensitive resistance) fabricated in the bulk of a diamond by C+ ion implantation followed by annealing. The kinetics of the response of the structure to irradiation with light from an LGI-21 pulsed nitrogen laser (lambda = 337 nm, tau(P) similar to 8 ns) were studied. The room-temperature response width at half-maximum is similar to 20 ns. Using the space - time distribution of responses of the structure, thermal ( bolometric) signals were resolved from signals of different nature ( photoconductivity or photovoltage).