TY - JOUR
T1 - Self-Powered Lithium Niobate Thin-Film Photodetectors
AU - Sun, Xiaoli
AU - Sheng, Yan
AU - Gao, Xu
AU - Liu, Yue
AU - Ren, Feng
AU - Tan, Yang
AU - Yang, Zaixing
AU - Jia, Yuechen
AU - Chen, Feng
N1 - Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022
Y1 - 2022
N2 - 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 × 1014 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.
AB - 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 × 1014 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.
KW - anomalous photovoltaic effect
KW - lithium-niobate-on-insulator thin films
KW - localized surface plasmon resonance
KW - on-chip photonic devices
KW - self-powered photodetectors
UR - http://www.scopus.com/inward/record.url?scp=85134379355&partnerID=8YFLogxK
U2 - 10.1002/smll.202203532
DO - 10.1002/smll.202203532
M3 - Article
SN - 1613-6810
VL - 18
JO - Small
JF - Small
IS - 35
M1 - 2203532
ER -