Translator Disclaimer
10 October 2020 Infrared photodetection based on hot electrons in plasmonic nanostructures
Author Affiliations +
The utilization of surface plasmons (SPs) in the form of hot electrons has a great potential for applications in photodetection. Unfortunately, the metallic nanostructures usually support only narrowband plasmon resonances and the hot-electron thermalization loss results in an inefficient internal quantum process. Here, we demonstrate a broadband super absorber based on the metallic nanorod arrays (NRs). The average absorption across the entire visible band is up to 0.8 and the conversion efficiency is over 30-fold enhanced relative to the reference. Furthermore, considering the metallic nanostructures are usually complex with a high fabrication challenge, we present a purely planar hot-electron photodetector based on Tamm plasmons (TPs). More than 87% of the light incidence can be absorbed by the top metal layer. This enables a strong and unidirectional photocurrent and a photoresponsivity that can even be higher than that of the conventional nanostructured system.
Conference Presentation
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Cheng Zhang and Xiaofeng Li "Infrared photodetection based on hot electrons in plasmonic nanostructures", Proc. SPIE 11557, Plasmonics V, 115570S (10 October 2020);

Back to Top