Unraveling the temperature dynamics and hot electron generation in tunable gap-plasmon metasurface absorbers.

ABSTRACT: Localized plasmons formed in ultrathin metallic nanogaps can lead to robust absorption of incident light. Plasmonic metasurfaces based on this effect can efficiently generate energetic charge carriers, also known as hot electrons, owing to their ability to squeeze and enhance electromagnetic fields in confined subwavelength spaces. However, it is very challenging to accurately identify and quantify the dynamics of hot carriers, mainly due to their ultrafast time decay. Their nonequilibrium temperature response is one of the key factors missing to understand the short time decay and overall transient tunable absorption performance of gap-plasmon metasurfaces. Here, we systematically study the temperature dynamics of hot electrons and their transition into thermal carriers at various timesca

SUBMITTER: Khosravi Khorashad L 

PROVIDER: S-EPMC11501958 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature