The multiple scattering (MS) process affects the spectroscopic investigation and the optical imaging of opaque samples. In Brillouin spectroscopy, MS affects the extraction of reliable micromechanical parameters inducing the ill definition of the exchanged wavevector of the scattering process, q. Here, we propose a new experimental method called Polarization Gated Brillouin Spectroscopy (PG-BS) able to disentangle the MS and the ballistic contributions. The results obtained on milk, used as benchmark material, demonstrate both the capability and easy applicability of the proposed method. Exploiting PG-BS for different biological materials can open the route to new frontiers in Brillouin imaging of opaque samples.
Polarization gated Brillouin spectroscopy: new perspectives for turbid media analysis
Caponi, Silvia;Capponi, Giulio;Alunni Cardinali, Martina;Passeri, Alessandra Anna;Fioretto, Daniele;Mattarelli, Maurizio
2023
Abstract
The multiple scattering (MS) process affects the spectroscopic investigation and the optical imaging of opaque samples. In Brillouin spectroscopy, MS affects the extraction of reliable micromechanical parameters inducing the ill definition of the exchanged wavevector of the scattering process, q. Here, we propose a new experimental method called Polarization Gated Brillouin Spectroscopy (PG-BS) able to disentangle the MS and the ballistic contributions. The results obtained on milk, used as benchmark material, demonstrate both the capability and easy applicability of the proposed method. Exploiting PG-BS for different biological materials can open the route to new frontiers in Brillouin imaging of opaque samples.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
