Publications Details

Raman thermometry of microdevices: Comparing methods to minimize error

Beechem, Thomas E.; Serrano, Justin R.

A study was conducted to demonstrate that the Raman response had the potential to be implemented in several different manners to deduce temperature. Each approach was derived from a different physical mechanism and offered particular advantages and disadvantages. It was demonstrated that temperature was deduced through the analysis of the inelastic energy transfer between the incident laser source and the quantized lattice vibrations in Raman thermometry. The peak position of the Raman signal was derived from the energy of the zone-center optical phonons that were probed during the Raman experiment. The linewidth of a Raman spectrum evolved as a result of the finite lifetime of the zone-center phonons that were being investigated. It was observed that the Raman signal originated as a consequence of the Heisenberg uncertainty principle, which stipulated that the energy of the phonon was measured only to within a certain specificity when the mode being investigated was available for only a finite amount of time.