High-Speed Compact Plasmonic-PdSe2 Waveguide-Integrated Photodetector
ACS Photonics(2023)
Abstract
Waveguide-integrated photodetectors are essential components in integrated photonic circuits since they facilitate light conversion into electrical signals. Nonetheless, optical absorption and carrier collection can significantly affect the device performance. As a solution to this issue, plasmonic slot waveguides confine optical energy within a subwavelength scale in a photoconductive detector, enhancing optical absorption and providing extremely short channels to collect carriers. Two-dimensional van der Waals layered palladium selenide (PdSe2) exhibits the merits of a narrow bandgap and high carrier mobility, thus positioning it as a favorable candidate material for photodetectors operating at the telecommunication band. In this study, we propose and experimentally verify a high-speed PdSe2-plasmonic waveguide-integrated photodetector with a dark current of 4.5 mu A and an intrinsic responsivity of 560.1 mA center dot W-1 at 3 V. Additionally, it has an internal quantum efficiency of 32.3%, and the measured 3 dB bandwidth is 17.5 GHz. This integrated photodetector fulfills the requirements of various critical applications in optical communication, microwave photonics, sensing, and imaging.
MoreTranslated text
Key words
integrated photodetector,plasmonics,slotwaveguide,PdSe2
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined