GRAPHERGIA’s investment in disseminating its research results continues growing with a new scientific article authored by our Italian partner the University “Sapienza” Rome (URM), and released in a scientific journal.
This scientific article, “Temperature Dependence of Coherent versus Spontaneous Raman Scattering”, was published in open access in November 2024 in the scientific journal “Physical Review Letters” (Phys. Rev. Lett. 133, 206902 – Published 15 November, 2024).
GRAPHERGIA’s Scientific Paper Abstract
Because of their sub picosecond temporal resolution, coherent Raman spectroscopies have been proposed as a viable extension of spontaneous Raman thermometry, to determine dynamics of mode specific vibrational energy content during out of equilibrium molecular processes. Here we show that the presence of multiple laser fields stimulating the vibrational coherences introduces additional quantum pathways, resulting in destructive interference. This ultimately reduces the thermal sensitivity of single spectral lines, nullifying it for harmonic vibrations and temperature independent polarizability. We demonstrate how harnessing anharmonic signatures such as vibrational hot bands enables coherent Raman thermometry.
About the Authors
This publication was authored by researchers based in Italy and USA, including:
- Giovanni Batignani – Dipartimento di Fisica, Universitá di Roma “La Sapienza”, Italy.
- Emanuele Mai – Dipartimento di Fisica, Universitá di Roma “La Sapienza”, Italy & Center for Life Nano Science Sapienza, Istituto Italiano di Tecnologia, Italy.
- Miles Martinati – Dipartimento di Fisica, Universitá di Roma “La Sapienza”, Italy.
- Mohanan M. Neethish – Dipartimento di Fisica, Universitá di Roma “La Sapienza”, Italy.
- Shaul Mukamel – Department of Chemistry, University of California, USA.
- Tullio Scopigno – Dipartimento di Fisica, Universitá di Roma “La Sapienza”, Italy.
Read and download the entire publication on GRAPHERGIA’s Zenodo Library!