Raman temperature measurement

Abstract

We are examining the experimental trade-offs for the use of the spontaneous Raman Stokes/anti-Stokes intensity ratio as a fundamental temperature measurement at static and dynamic extreme conditions. The trade-off space includes spatial resolution and temperature range versus vibrational frequency, as well as heating of the sample and nonlinear damage caused by the excitation laser. The experiments are being performed under a range of experimental conditions from nanoseconds to seconds and from cryogenic (77 K) to elevated (ca. 1000 K) temperatures. The results are being compared to calculations for transparent metal oxide and polymer materials, with the aim to demonstrate their potential as temperature reporters when used as thin windows on opaque materials. © Published under licence by IOP Publishing Ltd.