Study of Broadband Tunable Properties of Surface Plasmon Resonances of Noble Metal Nanoparticles Using Mie Scattering (CAT#: STEM-ST-0084-YJL)

Introduction

Metallic nanoparticles strongly scatter and absorb the incident light due to the excitation of surface plasmons which are the electromagnetic excitation of conduction electrons that exist at metal dielectric interface. The interactions of light to the metal nanoparticles are studied in terms of its resonant peak, which depends on the size, shape and local dielectric environment. Due to sensitive and highly flexible optical properties, noble metal nanoparticles have wide range of applications including biosensing, cancer therapy and photovoltaics, surface-enhanced Raman spectroscopy, optical filters and plasmonic devices.<br />Organic–inorganic-based perovskite photovoltaics are low cost, highly efficient technology to harvest sun light and convert it into the electricity. Recently, perovskite attracted strong interest for the researchers because of its own properties like high absorption coefficient and impressive energy conversion efficiencies. The most widely used perovskite material is methyl ammonium lead triiodide (CH3NH3PbI3) that has a bandgap (EG) of ∼1.57 eV very sharp absorption edge. Perovskites have also one of the promising materials for many applications such as solidstate lighting material lasing applications and have been employed for thin film devices.