Project: Low-wavenumber femtosecond coherent Raman spectrometer

Low-wavenumber femtosecond coherent Raman spectrometer

Project Funding/Type: “Great Relevance” project for joint Italy-USA research activities, co-funded by MAECI (Ministry of Foreign Affairs and International Cooperation) and ENEA

Area of interest: Physics and Astrophysics

Project duration: 2019-2022

Italian coordinator: Dr. Mauro Falconieri (ENEA FSN-TECFIS) - mauro.falconieri@enea.it

USA coordinator: Prof. Waruna D. Kulatilaka (Texas A&M University- TAMU)

Status: on line

PARTNERSHIP

ENEA, "Sapienza" University of Rome, Texas A&M University

PROJECT DESCRIPTION:

The Project deals with the measurement of the vibrational frequencies of molecular bonds involving heavy atoms or molecular groups in a sample. Such information is useful for identification and detection of molecular species in materials science applications and biophotonics. Experimentally, measurements are performed by an instrument (spectrometer) which detects the modifications of a “probe” femtosecond laser pulse produced by the interaction with a coherent molecular vibrational state previously produced in the sample by a “pump” pulse, according to the so-called Stimulated Raman Scattering (SRS) process. Italy-USA visit exchanges are planned to promote the scientific cooperation.

PROJECT OBJECTIVES:

Starting with the current state of the art, the Project aims to improve the performances of an SRS-based spectrometer in order to reduce the data acquisition time and increase the sensitivity, employing a single femtosecond laser source to guarantee ease of use and affordability of the apparatus.

Experimental apparatus schematics and picture

PROJECT PUBLICATIONS:

Falconieri M., Gagliardi S., Rondino F., Marrocco M., Kulatilaka W.D. “High-sensitivity impulsive stimulated Raman spectrometer with fast data acquisition”. J Raman Spectrosc. 2021, 52, 664. https://doi.org/10.1002/jrs.6048

Falconieri M., Gagliardi S., Rondino F., Marrocco M., Kulatilaka W.D. “Study of Impulsive Stimulated Raman Scattering Effects Using the Femtosecond Pump–Probe Z-Scan Technique”. Appl. Sci. 2021, 11, 11667. https://doi.org/10.3390/app112411667

Falconieri M., Marrocco M., Gagliardi S., Rondino F., Wang Y., Kulatilaka W.D., DelRe E., Di Mei F., “Operation of a Fourier-Transform Impulsive Stimulated Raman Spectrometer with Single Femtosecond Oscillator” Proceedings ECONOS 2020, Karlsruhe, Germany, 26-29/9/2021.

OTHER MATERIAL:

ENEAinform@ - Technology: Ultrashort laser pulses to study properties of materials

ENEAinform@ - Tecnologia: impulsi laser ultracorti per studiare le proprietà dei materiali

Sole24h-Platinum: Le nuove frontiere della spettroscopia

PARTICIPANTS:

ENEA: