Optoelectronic tuning of plasmon resonances via optically modulated hot electrons.

ABSTRACT: Fast optical modulation of nanoplasmonics is fundamental for on-chip integration of all-optical devices. Although various strategies have been proposed for dynamic modulation of surface plasmons, critical issues of device compatibility and extremely low efficiency in the visible spectrum hamper the application of optoplasmonic nanochips. Here we establish an optoplasmonic system based on Au@Cu_2-xS hybrid core-shell nanoparticles. The optical excitation of hot electrons and their charge transfer to the semiconductor coating (Cu_2-xS) lead to lowered electron density of Au, which results in the red shift of the localized surface plasmon resonance. The hot electrons can also transport through the Cu_2-x

SUBMITTER: Yao J 

PROVIDER: S-EPMC10989291 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature