Results 101 to 110 of about 8,207 (244)

Fabrication‐Tolerant GaAs/SiN Coupling Above the Loss Threshold for Quantum Photonic Applications

Laser &Photonics Reviews, EarlyView.
Reliable low‐loss optical coupling between GaAs and SiN waveguides for heterogeneous integration of single‐photon sources is demonstrated. By developing a fabrication‐aware numerical design approach and accounting for experimentally measured fabrication variations and scattering losses, coupling efficiencies meeting the < 10% loss requirement for ...
Miloš Ljubotina, Jasper De Witte, Zhe Liu, Andraž Debevc, Leonardo Midolo, Gunther Roelkens, Bart Kuyken, Dries Van Thourhout, Marko Topič, Janez Krč   +9 more
wiley   +1 more source

High-Performance Dual-Wavelength All-Optical Reflective Semiconductor Optical Amplifier Utilizing Solution-Processed Quantum Dots

Journal of Optoelectronical Nanostructures
This study introduces a dual-wavelength all-optical quantum dot reflective semiconductor optical amplifier (QD-RSOA), emphasizing its advanced performance and versatility in modern optical communication systems.
Hamed Ghatei Khiabani Azar, Samiye Matloub, Hamed Baghban   +2 more
doaj  

Carbon dots in electrochemiluminescence: Mechanisms, interface engineering, and bioanalytical applications

Responsive Materials, EarlyView.
Carbon dots are emerging as versatile electrochemiluminescent nanomaterials whose structure, surface states, and interfacial design jointly determine ECL pathways and performance. This review highlights how mechanistic understanding and materials engineering enable programmable CD‐ECL systems for bioanalysis, imaging, and future intelligent analytical ...
Yuhan Zhao, Zixuan Chen, Jun‐Jie Zhu
wiley   +1 more source

Defect‐Healed Perovskite Quantum Dots for Optoelectronic Applications in Indoor Photovoltaics and Photoplethysmography

Small, EarlyView.
A novel dispersion‐phase defect‐healing strategy using Br‐doped PbS quantum dots (QDs) significantly stabilizes CsPbI3 perovskite (Pe) QDs by passivating internal vacancies. This approach reduces trap‐assisted nonradiative recombination, enabling high‐performance indoor photovoltaics with exceptional stability.
Seon Joong Kim, Junhyeok Park, Byung Ku Jung, Ohhyun Kwon, Sang Heon Lee, Hyung Jin Choi, Seongyong Hong, Min Jong Lee, Soong Ju Oh, Jae Won Shim   +9 more
wiley   +1 more source

Heavy‐Metal‐Free Colloidal Quantum Dots for Photocatalysis

Small, EarlyView.
Heavy‐metal‐free colloidal quantum dots provide sustainable photocatalytic platforms by combining tunable band structures, strong light absorption, and programmable surfaces/interfaces. This Review highlights how core/shell engineering, alloying, defect regulation, ligand design, and hybrid‐interface construction direct charge separation and ...
Xintong Xu, Ge Yang, Qin Li, Dechao Chen
wiley   +1 more source

Thermally Regulated Droplet Microfluidics Enables Uniform, Size‐Controllable DNA‐Nanoparticle Superlattices

Small, EarlyView.
Thermally regulated droplet microfluidics enables controlled assembly of DNA‐functionalized gold nanoparticles into uniform, size‐controllable superlattice crystals. Monodisperse droplets formed at elevated temperature suppress premature hybridization, followed by ultra‐slow cooling to promote near‐equilibrium growth.
Naotomo Tottori, Miho Tagawa, Azusa Takao, Lidong Zhang, Maasa Yokomori, Shinya Sakuma, Yoko Yamanishi   +6 more
wiley   +1 more source

Bio‐Compatible Flexible Memristive Devices Enabled by BNNT/MWCNT–ZnO Quantum Dot Hybrid Percolation Networks

Small, EarlyView.
BNNT rods incorporated into MWCNT–ZnO quantum dot networks regulate charge transport and suppress leakage in flexible, transparent resistive memory devices. The resulting hybrid architecture preserves nonvolatile switching under static bending and after low‐temperature exposure and subcutaneous implantation.
Jaeho Shim, Dong Gwon Heo, Seonghwan Oh, Jinseo Park, Seok‐Ho Seo, Juhee You, Yuwen Wei, Whan Kim, Inseok Seo, Jinseok Kim, Donghee Park, Dong Ick Son   +11 more
wiley   +1 more source

Quantum dot single photon source on SiN integrated with coupled crossover waveguides

Applied Physics Express
Hybrid integration of InAs/GaAs quantum dot (QD) single-photon sources (SPSs) is a promising approach for introducing quantum light into SiN photonic integrated circuits. However, the large refractive-index mismatch between GaAs and SiN poses a challenge
Akinari Fujita, Hironobu Yoshimi, Natthajuks Pholsen, Masahiro Kakuda, Makoto Okano, Satoshi Iwamoto, Yasuhiko Arakawa, Yasutomo Ota   +7 more
doaj   +1 more source

Top‐Down Synthesis of Wurtzite Gallium Nitride Colloidal Quantum Dots via Defect‐Driven Fragmentation

Small Methods, EarlyView.
Conventional synthesis of wurtzite gallium nitride (GaN) quantum dots (QDs) demands extreme heat. We overcome this via defect‐driven fragmentation at 50°C. Nitrogen‐rich solvents provide a thermodynamic driving force that promotes the outward movement of internal defects.
Yangpil Jang, Kwangwook Kim, Hayeon Baek, Dongjun Kim, Jungwon Park, Jeong Woo Han, Jongnam Park   +6 more
wiley   +1 more source

“Shadow Mask‐Based RGB Color Patterning in QLED Panels via Selective Quenching by Metals”

Small Methods, EarlyView.
A shadow mask‐based RGB color‐patterning approach for QLED panels is presented, in which ultrathin metal layers (1–2 nm) are deposited through shadow masks to selectively quench the luminescence of QD layers in a tandem stack. This enables different regions to emit different colors under electrical bias, offering a scalable route compatible with ...
Bhuiyan Saad Bin Mobarak, Fatemeh Samaeifar, Atefeh Ghorbani, Tiancheng Xu, Hany Aziz   +4 more
wiley   +1 more source