Year: 2026
Type: article
Abstract: ABSTRACT Nanophotonic structures enable transformative sensing in miniaturized platforms but are fundamentally constrained by their limited sensitivity across broad refractive index (RI) ranges. Here, we developed novel “propped” plasmonic nanoparticle lattices as a universal platform for elevated high‐quality surface lattice resonances (SLRs). This architecture decouples the SLRs from the substrate, enabling effective operation in arbitrary RI environments and achieving sensitivity exceeding 1000 nm/RIU (Δn = 0.02)—surpassing the theoretical periodicity‐correlated limit. By integrating functional materials, we further validate platform versatility through proof‐of‐concept detections of (1) gas concentration by integration of metal–organic framework films with > 40 nm resonance shifts and illustrate sensitivity (∼0.8 nm/%VOL) at room temperature; (2) polymer height dynamics (resolutions at ΔH/Δλ = 24.3 nm/nm of height change/wavelength shift); (3) pH alterations (pH sensitivity up to Δλ/ΔpH = 2.8 nm/pH of wavelength shift/pH change). This work redefines the limits of RI detection and establishes a scalable and viable platform for next‐generation nanophotonic sensors across diverse applications.
Source: Laser & Photonics Review
DOI: 10.1002/lpor.72129
Institutions: East China University of Science and Technology, Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology, University of Chinese Academy of Sciences, Shanghai University, Nanjing University of Science and Technology, Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7223469848