Origin of Fresnel problem of two dimensional materials.

ABSTRACT: Reflectance, transmittance, and absorption of materials are also known as materials' Fresnel problem. It is widely accepted that Interface model can be utilized to solve Fresnel problem of two dimensional materials. Here, we question the validity of Interface model. Theoretical and experimental results of two dimensional materials are analyzed, and theoretical optical response of two dimensional materials is derived based on thin film model. A new simple, approximate formula of 4πnkd/λ is proposed for calculation of absorption of two dimensional materials. It is found that, in essence, Interface model is a kind of approximate style of thin film model, the main difference between two models is term of (n² - k²) at normal incidence. A significant error is introduced int

SUBMITTER: Wang X 

PROVIDER: S-EPMC6882841 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature