Picosecond optical studies of amorphous diamond and diamondlike carbon: Thermal conductivity and longitudinal sound velocity

摘要

A picosecond pump‐probe technique is used to measure the room‐temperature thermal conductivity kgr; and longitudinal sound velocityclof amorphous diamond (a‐D) and diamondlike carbon (DLC) thin films. Both kgr; andclwere found to decrease with film hydrogen content. Depending on the film deposition technique, kgr; is in the range 5–10×10−2W cm−1 K−1fora‐D, and 3–10×10−3W cm−1 K−1for DLC. Values ofclwere found to be in the range 14–18×105cm s−1fora‐D, and 6–9×105cm s−1for DLC.