Semiconductor quantum dots (QDs) have recently caused a stir as a promising and powerful lighting material applied in real-time fluorescence detection, display, and imaging. Photonic nanostructures are well suited for enhancing photoluminescence (PL) due to their ability to tailor the electromagnetic field, which raises both radiative and nonradiative decay rate of QDs nearby. However, several proposed structures with a complicated manufacturing process or low PL enhancement hinder their application and commercialization. Here, we present two kinds of dual-resonance gratings to effectively improve PL enhancement and propose a facile fabrication method based on holographic lithography. A maximum of 220-fold PL enhancement from CdSe/CdS/ZnS QDs are realized on 1D Al-coated photoresist (PR) gratings, where dual resonance bands are excited to simultaneously overlap the absorption and emission bands of QDs, much larger than those of some reported structures. Giant PL enhancement realized by cost-effective method further suggests the potential of better developing the nanostructure to QD-based optical and optoelectronic devices.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.521561 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Bis(tricyclic) Aromatic Enes That Exhibit Efficient Fluorescence in the Solid State.
Molecules
November 2024
Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan.
Article Synopsis
- New organic luminophores called bis(tricyclic) aromatic enes (BAEs), featuring 6-6-6-membered frameworks like acridine and xanthene, display blue-to-green fluorescence in solid states and polymer films with high quantum yields.
- These BAEs are synthesized through a palladium-catalyzed double cross-coupling reaction, producing microcrystals or powders that fluoresce brilliantly.
- Theoretical calculations indicate that their light absorption involves π-π* transitions, with a distinct charge transfer occurring in the 10,10-dioxido-9-thioxanthene variant.
Is stochastic thermodynamics the key to understanding the energy costs of computation?
Proc Natl Acad Sci U S A
November 2024
Massachusetts Institute of Technology Media Lab, Massachusetts Institute of Technology, Cambridge, MA 02139.
Article Synopsis
- The relationship between thermodynamics and computation has fascinated scientists since the 19th century, but its significance has grown due to the rising energy costs of digital devices.
- Real-world computers, including biological ones like brains, operate under various physical constraints, which impact their thermodynamic dynamics and efficiency.
- The emerging field of stochastic thermodynamics offers new analytical techniques to explore how these constraints affect the fundamental thermodynamic properties of systems performing computation.
A Comprehensive Review of Group-III Nitride Light-Emitting Diodes: From Millimeter to Micro-Nanometer Scales.
Micromachines (Basel)
September 2024
Key Laboratory of Luminescence Science and Technology, Chinese Academy of Sciences & State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Article Synopsis
- * Key advancements include improvements in substrate pretreatment, p-type doping, and innovative structures like nano-LEDs and quantum dot LEDs, focusing on enhancing luminous efficiency across different colors.
- * Micro-LED technology, derived from group-III nitride LEDs, is gaining attention as a new display device, with nano-LEDs expected to lead future developments in energy-efficient and environmentally friendly displays.
Insight into ion dynamics in a NaClO-doped polycaprolactone solid polymer electrolyte for solid state batteries.
Phys Chem Chem Phys
October 2024
Centre for Ionics Universiti Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
Employing low polymers has fundamental limitations in providing the desirable ionic conductivity at ambient temperature due to the freezing of chain dynamics. The stiffening of polymer chains and the formation of highly ordered systems due to the crosslinks have influenced the ionic conductivity. Ionic conductivity of 1.
View Article and Find Full Text PDFTwo mass-imbalanced atoms in a hard-wall trap: Deep learning integrability of many-body systems.
Phys Rev E
August 2024
Zhejiang Key Laboratory of Quantum State Control and Optical Field Manipulation, Department of Physics, Zhejiang Sci-Tech University, 310018 Hangzhou, China.
The study of integrable systems has led to significant advancements in our understanding of many-body physics. We design a series of numerical experiments to analyze the integrability of a mass-imbalanced two-body system through energy-level statistics and deep learning of wave functions. The level spacing distributions are fitted by a Brody distribution and the fitting parameter ω is found to separate the integrable and nonintegrable mass ratios by a critical line ω=0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!