Integrated PbS Colloidal Quantum Dot Photodiodes on Silicon Nitride Waveguides.

ABSTRACT: Colloidal quantum dots (QDs) have become a versatile optoelectronic material for emitting and detecting light that can overcome the limitations of a range of electronic and photonic technology platforms. Photonic integrated circuits (PICs), for example, face the persistent challenge of combining active materials with passive circuitry ideally suited for guiding light. Here, we demonstrate the integration of photodiodes (PDs) based on PbS QDs on silicon nitride waveguides (WG). Analyzing planar QDPDs first, we argue that the main limitation WG-coupled QDPDs face is detector saturation induced by the high optical power density of the guided light. Using the cladding thickness and waveguide width as design parameters, we mitigate this issue, and we demonstrate WG-QDPDs with an external quantu

SUBMITTER: Pang C 

PROVIDER: S-EPMC10741659 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature