Self-Powered Lithium Niobate Thin-Film Photodetectors.
Xiaoli SunYan ShengXu GaoYue LiuFeng RenYang TanZaixing YangYuechen JiaFeng ChenPublished in: Small (Weinheim an der Bergstrasse, Germany) (2022)
Thin-film lithium niobate platform, namely lithium-niobate-on-insulator (LNOI), brings new opportunities for integrated photonics, taking advantages from both outstanding crystalline properties and special structural features. The excellent properties of LNOI have triggered development of a variety of on-chip photonic devices for light generation and manipulation. However, as an indispensable component for photonic circuit with full functionalities, the thin-film photodetector lacks in portfolios of LNOI-based devices due to standing obstacles of low electrical conductivity and poor photoelectric conversion ability. Here, a self-powered broadband LNOI photodetector based on enhanced photovoltaic effect, benefitting from encapsulated plasmonic nanoparticles and doped silver ions, is reported. Maximum responsivity of 0.25 A W -1 and detectivity (1.56 × 10 14 Jones) are achieved. First-principle calculations and electric-field simulation reveal intrinsic mechanisms and crucial roles of plasmonic nanoparticles and silver ions on photocurrent generation and collection. This work opens an avenue to develop high-performance on-chip LNOI photodetectors, offering a conceivable means toward multiple-functional photonic circuits.
Keyphrases
- high speed
- quantum dots
- high throughput
- solid state
- gold nanoparticles
- circulating tumor cells
- single molecule
- energy transfer
- silver nanoparticles
- single cell
- density functional theory
- molecular dynamics simulations
- molecular dynamics
- visible light
- high resolution
- genome wide
- label free
- room temperature
- highly efficient
- gene expression
- dna methylation
- metal organic framework
- walled carbon nanotubes