TY - JOUR
T1 - Topologically Engineered High-Q Quasi-BIC Metasurfaces for Enhanced Near-Infrared Emission in PbS Quantum Dots
AU - Guo, Jiaoyang
AU - Jin, Rong
AU - Fu, Zhenchu
AU - Zhang, Yukang
AU - Yu, Feilong
AU - Chen, Jin
AU - Wang, Xingjun
AU - Huang, Lujun
AU - Zhou, Chaobiao
AU - Chen, Xiaoshuang
AU - Lu, Wei
AU - Li, Guanhai
N1 - Publisher Copyright:
© 2025 American Chemical Society.
PY - 2025/2/12
Y1 - 2025/2/12
N2 - Enhancing photoluminescence (PL) efficiency in colloidal quantum dots is pivotal for next-generation near-infrared photodetectors, imaging systems, and photonic devices. Conventional methods, especially metal-based plasmonic structures, suffer from large optical losses, which limits their practical use. Here, we introduce a quasi-bound state in the continuum (quasi-BIC) metasurface on a silicon-on-insulator platform, tailored to provide high-quality factor resonances with minimized losses. Utilizing topological charge engineering and controlled in-plane asymmetry in silicon cylinder arrays, we developed a robust quasi-BIC capable of maintaining a high Q factor across a broad angular range, achieving an experimental Q factor of 3031 at normal incidence. This approach significantly enhances near-field interactions, achieving a ≤110-fold increase in PL for PbS quantum dots at 33 K and a 41-fold enhancement at room temperature. Our findings offer a scalable, cost-effective solution for enhancing light emission in advanced optoelectronic applications.
AB - Enhancing photoluminescence (PL) efficiency in colloidal quantum dots is pivotal for next-generation near-infrared photodetectors, imaging systems, and photonic devices. Conventional methods, especially metal-based plasmonic structures, suffer from large optical losses, which limits their practical use. Here, we introduce a quasi-bound state in the continuum (quasi-BIC) metasurface on a silicon-on-insulator platform, tailored to provide high-quality factor resonances with minimized losses. Utilizing topological charge engineering and controlled in-plane asymmetry in silicon cylinder arrays, we developed a robust quasi-BIC capable of maintaining a high Q factor across a broad angular range, achieving an experimental Q factor of 3031 at normal incidence. This approach significantly enhances near-field interactions, achieving a ≤110-fold increase in PL for PbS quantum dots at 33 K and a 41-fold enhancement at room temperature. Our findings offer a scalable, cost-effective solution for enhancing light emission in advanced optoelectronic applications.
KW - PbS quantum dots
KW - photoluminescence enhancement
KW - quasi-bound state in the continuum
UR - https://www.scopus.com/pages/publications/85217834821
U2 - 10.1021/acs.nanolett.4c05710
DO - 10.1021/acs.nanolett.4c05710
M3 - 文章
C2 - 39812516
AN - SCOPUS:85217834821
SN - 1530-6984
VL - 25
SP - 2357
EP - 2365
JO - Nano Letters
JF - Nano Letters
IS - 6
ER -