Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Precise control over the emission direction of colloidal quantum dots (CQDs), which are promising color conversion materials for micro-light-emitting-diode displays, is increasingly important for augmented-reality and virtual-reality near-eye optics. Here, we report a fully dielectric silicon nitride (SiN) photonic crystal (PhC) platform that boosts CQD photoluminescence by an 8.5-fold increase while compressing the angular full-width at half-maximum to 6.5°. Embedding CdSe/ZnS CQDs into one- and two-dimensional PhCs aligns band-edge guided-mode resonances with the emitter spectrum, converting guided Bloch modes into leaky modes that satisfy in-plane phase-matching conditions. Finite-difference time-domain simulations, photonic-band mapping, and angle-resolved photoluminescence measurements confirm that the PhC period deterministically sets the emission angle and that the PhC lattice funnels light symmetrically around the Γ point to achieve omnidirectional collimation. This all-dielectric architecture offers intrinsically low propagation loss and provides a scalable, lithography-defined platform for bright, color-pure, and angularly engineered light sources for next-generation displays, sensors, and on-chip photonic devices.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d5nr02616d | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Inverting the Rhodamine Paradigm: Closed-Form Fluorescence with 280 nm Stokes Shift Drives Plastic Circularity.
Angew Chem Int Ed Engl
September 2025
Shaanxi Key Laboratory of New Concept Sensors and Molecular Materials, Key Laboratory of Applied Surface and Colloids Chemistry, Department of Chemistry and Chemical Engineering, ShaanXi Normal University, Xi'an, 710062, P.R. China.
Rhodamine derivatives exhibiting inverted open-closed form fluorescence behavior redefines conventional photochemical paradigms while illuminating new structure-property relationships and fascinating application potentials. Herein, we report a donor-acceptor engineering strategy that activates closed form emission in rhodamines, achieving unprecedented Stokes shifts (>280 nm) while overcoming aggregation-caused quenching. The new class of rhodamines with inverted open-close form emission behavior are created through simultaneous substitution of N,N-diethyl groups with indole (donor) and conversion of spiro-lactam to benzene sulfonamide (acceptor).
View Article and Find Full Text PDFImmunoelectron microscopy: a comprehensive guide from sample preparation to high-resolution imaging.
Discov Nano
September 2025
Department of Rehabilitation Medicine, Rehabilitation Medical Center, Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, 610041, People's Republic of China.
Immunoelectron Microscopy (IEM) is a technique that combines specific immunolabeling with high-resolution electron microscopic imaging to achieve precise spatial localization of biomolecules at the subcellular scale (< 10 nm) by using high-electron-density markers such as colloidal gold and quantum dots. As a core tool for analyzing the distribution of proteins, organelle interactions, and localization of disease pathology markers, it has irreplaceable value, especially in synapse research, pathogen-host interaction mechanism, and tumor microenvironment analysis. According to the differences in labeling sequence and sample processing, the IEM technology system can be divided into two categories: the first is pre-embedding labeling, which optimizes the labeling efficiency through the pre-exposure of antigenic epitopes and is especially suitable for the detection of low-abundance and sensitive antigens; the second is post-embedding labeling, which relies on the low-temperature resin embedding (e.
View Article and Find Full Text PDFAdvanced Architectures and Emerging Materials for High-Operating-Temperature Infrared Photodiodes.
Adv Mater
September 2025
College of Integrated Circuits & Micro-Nano Electronics, Fudan University, Shanghai, 200433, China.
High-operating-temperature (HOT) mid-wavelength and long-wavelength infrared photodetectors have emerged as critical enablers for eliminating bulky cryogenic cooling systems, offering transfromative potential in developing compact, energy-efficient infrared technologies with reduced size, weight, power, and cost. Focusing on infrared photodiodes, this review first discusses the fundamental mechanisms limiting performance at elevated operating temperatures. Subsequently, the progress in conventional epitaxial semiconductors, such as HgCdTe, InAsSb, and III-V type-II superlattice is reviewed, highlighting the evolution of device architectures designed to effectively suppress dark currents and approach background-limited performance.
View Article and Find Full Text PDFEnergy Transfer from Multiple Excitons in a Perovskite Nanocrystal to Organic Dyes Revealed by Single-Particle Spectroscopy.
J Am Chem Soc
September 2025
Department of Applied Chemistry for Environment, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, Hyogo 669-1330, Japan.
Colloidal semiconductor quantum dots (QDs) can generate multiple excitons (MXs) within a single QD. Owing to their large absorption cross-section, efficient utilization of MX is anticipated for the development of light-harvesting systems. However, MXs typically undergo nonradiative decay via Auger recombination (AR).
View Article and Find Full Text PDFDual sulfur sources redox dynamics guided growth of 〈hk1〉-oriented SbS microrods: lattice strain modulation for ultra-low dark current.
J Colloid Interface Sci
September 2025
College of Physics and Electronic Information, Yunnan Key Laboratory of Optoelectronic Information Technology, Yunnan Normal University, Kunming 650500, China. Electronic address:
Antimony trisulfide (SbS) has emerged as a promising inorganic semiconductor for optoelectronics due to its distinctive anisotropic crystal structure and suitable bandgap (∼1.7 eV). While hydrothermal synthesis remains challenging for achieving high crystallinity and controlled morphology, we developed an innovative dual‑sulfur precursor strategy utilizing sodium thiosulfate (STS) and thioacetamide (TAA) at a 7:2 M ratio with SbCl.
View Article and Find Full Text PDF