Back-scattering CARS diagnostics on CVD diamond

摘要

Raman spectroscopy has developed as a major technique to determine the quality of chemical vapor deposited (CVD)-grown diamond films. However the use of spontaneous Raman spectroscopy for in-situ measurements is difficult due to the highluminosity of the CVD reactor. We demonstrate the technique of back-scattering coherent anti-stokes Raman spectroscopy (CARS) as a new way to measure the Raman spectrum of polycrystalline diamond films. After further optimization hack-scattering CARSshould prove useful as a tool for in-situ diagnostics during diamond film growth.