Detection of refractive index and imperfection in thin film transparent polymer by back focal plane imaging

Autor: Kilmovsky Hodaya, Shavit Omer, Oheim Martin, Salomon Adi
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: EPJ Web of Conferences, Vol 309, p 02007 (2024)
Druh dokumentu: article
ISSN: 2100-014X
DOI: 10.1051/epjconf/202430902007
Popis: Emission patterns from molecules at interfaces encode many details about their local environment and their axial position, along the microscope’s optical axis. We introduce an advanced approach that synergizes back focal plane (BFP) imaging with innovative ‘smart’ surfaces make surface imaging more qualitative, more reliable, and more robust. Our method is particularly focused on accurately measuring the refractive index (RI) of transparent thin films and their imperfections close to the interfaces. Our technique utilizes a ‘smart’ surface, which features a uniform fluorescent thin film of about 4 nm thickness together with back-focal plane (BFP) imaging. We manage to detect bubbles or other imperfection in 100 nm thin film of polymer with RI of 1.34.
Databáze: Directory of Open Access Journals