부산대학교 도서관

A low cost and reusable illumination source having low spatial coherency and a high value of photon degeneracy (δ) is an ideal choice for applications in speckle-free imaging of biological tissues etc. Therefore, in this work using commercially available low-cost yellow sticky note paper (SNP) and silver nanoparticles (AgNPs) a biodegradable and reusable RL system has been designed for the first time, which can be affixed to a microscope slide for speckle-free imaging applications. In this work, Ag NPs of different shapes have been wedded separately to SNPs to achieve a good overlap between Ag Plasmons and the emission band of yellow FBA. Thus, in the presence of triangular Ag NPs of edge length ~ 60 nm, RL emission at 585.7 nm is achieved with a low lasing threshold of 13.7 W/cm2 and line width of ~ 1.40 nm. Some of the experimental observations are also supported by the necessary theoretical calculations. The interesting light-emitting features of the designed SNP-based Plasmonic RL illumination includes low special coherency with the speckle contrast of 0.04 and a high photon degeneracy of ≈ 2, which are fruitfully employed to demonstrate the artifact-free imaging of a TEM grid. We hope the present work can light the way of designing a reusable, low cost, and biocompatible source of illumination for development of high quality RL-based portable imaging system, in future. [ABSTRACT FROM AUTHOR]