Article
Chemistry, Multidisciplinary
Ja-Yeon Kim, Gwang-Geun Oh, Eunjin Kim, Hyeon-Seung Kim, Gwangsik Hong, Jae-Hyun Ryou, Min-Ki Kwon
Summary: This study successfully improved the efficiency of LEDs by introducing silver nanoparticles into silver nanowire networks, achieving enhanced internal quantum efficiency and light extraction through the coupling of localized surface plasmons.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Cheng-Jie Wang, Ying Ke, Guo-Yi Shiu, Yi-Yun Chen, Yung-Sen Lin, Hsiang Chen, Chia-Feng Lin
Summary: This study achieved directional emission properties and narrow linewidth in InGaN-based resonant-cavity light-emitting diodes through a simple wet etching process to transform the epitaxial structures into distributed Bragg reflector structures.
APPLIED SCIENCES-BASEL
(2021)
Article
Crystallography
Tsau-Hua Hsieh, Wei-Ta Huang, Kuo-Bin Hong, Tzu-Yi Lee, Yi-Hong Bai, Yi-Hua Pai, Chang-Ching Tu, Chun-Hui Huang, Yiming Li, Hao-Chung Kuo
Summary: We compared the performance of commercial mu-LEDs and three-layered staggered QW mu-LED arrays, and investigated the self-heating effect. We proposed a green mu-RCLED with staggered MQWs and Ta2O5/SiO2 DBRs. Simulation results showed that the staggered MQWs reduced blue-shift and maintained output power at high input current, while the Ta2O5/SiO2 DBRs significantly reduced FWHM and divergence angle. The mu-RCLEDs effectively resolved wavelength instability and color purity issues of conventional mu-LEDs.
Article
Materials Science, Multidisciplinary
Seong Keun Kim, Mi Jin Park, Ramchandra Pode, Jang Hyuk Kwon
Summary: Utilizing a silver cathode can optimize the optical efficiency of deep blue TEOLEDs, and using a narrow bandwidth emitter can further enhance the device efficiency.
ADVANCED PHOTONICS RESEARCH
(2021)
Article
Anatomy & Morphology
Sy-Hann Chen, Yi-Wen Hong, Yuan-Fong Chou Chau, Hung Ji Huang, Hai-Pang Chiang
Summary: Silver-nanoparticles deposited on indium tin oxide (AgNPs/ITO) with different O-2-plasma treatment times are used as the anode window substrate for polymer light-emitting diodes (PLED). O-2-plasma treatment of 10 minutes results in a significantly higher current efficiency of 3.33 cd/A compared to the reference PLED (1.00 cd/A). The optimal PLED with AgNPs/ITO shows a 3.24-fold increase in mean current efficiency and a 480% enhancement in electroluminescence intensity compared to the reference PLED. O-2-plasma treatment is an easy and scalable method for optimizing the localized surface plasmon resonance effect of metal nanoparticles, making it highly suitable for optoelectronic applications.
MICROSCOPY RESEARCH AND TECHNIQUE
(2023)
Article
Chemistry, Multidisciplinary
Klaudia Hurtukova, Tereza Vasinova, Nikola Slepickova Kasalkova, Dominik Fajstavr, Silvie Rimpelova, Vladimira Svobodova Pavlickova, Vaclav Svorcik, Petr Slepicka
Summary: This study aimed to prepare an antibacterial surface on a flexible polydimethylsiloxane substrate and investigate the combination of techniques applicable against both Gram-positive and Gram-negative bacteria. The surface morphology, chemistry, and wettability changes were studied using various characterization techniques. The results showed that the treated polydimethylsiloxane surface exhibited strong antibacterial properties against two bacterial strains of S. epidermidis and E. coli.
Article
Chemistry, Multidisciplinary
Cheng-Liang Huang, Hung Ji Huang, Sy-Hann Chen, Yu-Siang Huang, Po-Ching Kao, Yuan-Fong Chou Chau, Hai-Pang Chiang
Summary: This study successfully synthesized triangular silver nanoplates and silver nanodecahedrons with different light-absorption and light-scattering properties, and found that nanoparticles with higher light scattering property can induce a stronger localized surface plasmon resonance effect.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yaowei Peng, Xiaoyu Huang, Fu Wang
Summary: Bi-metallic gold/silver nanoclusters with large Stokes shifts were synthesized using a one-pot method. The silver effect in the gold/silver nanoclusters results in strong NIR fluorescence, making it suitable for use as a two-photon fluorescent contrast agent for in vivo bioimaging.
CHEMICAL COMMUNICATIONS
(2021)
Article
Optics
Kuo-Bin Hong, Wei-Ta Huang, Wen-Cheng Hsu, Chang-Ching Tu, Hao-Chung Kuo
Summary: In this work, an InGaN-based, green micro-photonic crystal-light-emitting-diode (mu-PCLED) with a nanoporous GaN-distributed Bragg reflector (DBR) was fabricated and characterized. The numerical simulations showed that the p-GaN photonic crystal (PC) with a filling factor of 0.3 improved the coupling constants of the Bragg diffractions. Experimental results demonstrated that the fabricated mu-PCLED emitted single-wavelength green light with small FWHM.
Article
Materials Science, Multidisciplinary
Hyunsu Cho, Chul Woong Joo, Sukyung Choi, Chan-mo Kang, Byoung-Hwa Kwon, Jin-Wook Shin, Kukjoo Kim, Dae-Hyun Ahn, Nam Sung Cho, Gi Heon Kim
Summary: The optical and electrical properties of the top electrode play a crucial role in the design of top-emitting organic light-emitting diodes (OLEDs). This study reveals that a metal thin film consisting of Ag deposited with Mg at a 9:1 concentration exhibits higher conductivity and higher transmittance compared to a pure Ag thin film. Additionally, the addition of a thin Mg:LiF (1:1) layer improves the uniformity and electron injection property of the Mg:Ag metal film. Applying a Mg:LiF/Mg:Ag thin film to top-emitting white OLEDs lowers the driving voltage, improves efficiency, reduces the color shifts for viewing angles, and achieves emission characteristics close to Lambertian.
ORGANIC ELECTRONICS
(2022)
Article
Chemistry, Physical
Mikkel B. Liisberg, Zahra Shakeri Kardar, Stacy M. Copp, Cecilia Cerretani, Tom Vosch
Summary: This study characterizes the DNA-AgNC with emission around 960 nm in solution and shows its brightness and photostability when embedded in PVA, enabling single-molecule detection. The exploration of DNA-AgNC5 in the NIR II region may lead to promising bioimaging applications with unprecedented signal-to-background ratios and single-molecule sensitivity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Polymer Science
Mohd Hafiz Abu Bakar, Nur Hidayah Azeman, Nadhratun Naiim Mobarak, Nur Afifah Ahmad Nazri, Tengku Hasnan Tengku Abdul Aziz, Ahmad Rifqi Md Zain, Norhana Arsad, Ahmad Ashrif A. Bakar
Summary: This research investigates the physicochemical properties of biopolymer succinyl-kappa-carrageenan as a potential sensing material for NH4+ Localized Surface Plasmon Resonance (LSPR) sensor. The results show that AgNP-Succinyl-kappa-carrageenan LSPR has higher performance than AgNP-kappa-carrageenan LSPR, broader detection range than the conventional method, and high selectivity toward NH4+. The adsorption of NH4+ on kappa-carrageenan and succinyl-kappa-carrageenan were through multilayer and chemisorption process that follows Freundlich and pseudo-second-order kinetic model.
Review
Chemistry, Multidisciplinary
Zhizhong Chen, Chuhan Deng, Xin Xi, Yifan Chen, Yulong Feng, Shuang Jiang, Weihua Chen, Xiangning Kang, Qi Wang, Guoyi Zhang, Bo Shen
Summary: This study investigates the coupling effect of localized surface plasmon (LSP) with multiple radiators, particularly in the application to green LEDs. The research found that the periodic structure and morphology of Ag nanoparticles have an impact on the LSP resonance intensity and light scattering efficiency, and also considered the coupling effect and feedback effect of SP dipoles with Ag NPs in the simulation experiments.
Article
Chemistry, Physical
Zi Yu Pan, Peng Fei Gao, Chun Ju Jing, Jun Zhou, Wen Ting Liang, Gang Lei, Wei Feng, Yuan Fang Li, Cheng Zhi Huang
Summary: This study reveals that plasmon-driven photocatalytic reactions (PPR) are proton-coupled electron transfer (PCET) dependent, with alternation first and then simultaneity of electron gain and loss. This finding provides exciting opportunities for enhancing efficient light-to-energy and photoelectric conversions, while also offering insight into the plasmon-driven photocatalytic formation of azo compounds.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Analytical
Lili Han, Zhaowei Wang, Nikita Yu. Gordeev, Mikhail V. Maximov, Xiansheng Tang, Artem A. Beckman, Grigoriy O. Kornyshov, Alexey S. Payusov, Yuri M. Shernyakov, Alexey E. Zhukov, Kuilong Li, Ruizhan Zhai, Zhongqing Jia, He Yang, Wei Zhang
Summary: Semiconductor lasers have rapidly developed in response to the growth of the global laser market. The use of semiconductor laser diodes is currently considered the most advanced option for achieving high-power solid-state and fiber lasers with optimal efficiency, energy consumption, and cost parameters. This work investigates an approach for optical mode engineering in planar waveguides known as Coupled Large Optical Cavity (CLOC), which allows for the selection of high-order modes through resonant optical coupling between waveguides. The state-of-art and application of the CLOC operation are reviewed and discussed, showing it to be a simple and cost-efficient solution for improving diode laser performance through numerical simulation and experiment.
Article
Nanoscience & Nanotechnology
Amadou Thierno Diallo, Mahmoud Chakaroun, Samira Khadir, Sarah Hamdad, Juan U. Esparza-Villa, Agnes Maitre, Azzedine Boudrioua
JOURNAL OF NANOPHOTONICS
(2019)
Article
Engineering, Electrical & Electronic
A. C. Chime, A. P. A. Fischer, S. Bensmida, J. Solard, M. Chakaroun, H. Nkwawo
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2019)
Article
Chemistry, Multidisciplinary
Wafa Safar, Mederic Lequeux, Jeanne Solard, Alexis P. A. Fischer, Nordin Felidj, Pietro Giuseppe Gucciardi, Mathieu Edely, Marc Lamy de la Chapelle
Article
Optics
Thinhinane Zeghdoudi, Zahia Kebci, Abdelaziz Mezeghrane, Abderrahmane Belkhir, Fadi Issam Baida
Summary: This study designed a half-wave plate based on birefringent metamaterial for operation in the visible range, achieving high transmission coefficients and birefringence through efficiency optimization. This type of anisotropic metasurfaces holds great potential for a wide range of applications in integrated photonics.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Sabrina Mesli, Hakim Yala, Mahdi Hamidi, Abderrahmane BelKhir, Fadi Issam Baida
Summary: The symmetry breaking in a typical dielectric GMR-grating structure allows the coupling of incident waves with Symmetry-Protected Modes (SPM). In this study, the excitation conditions for these particular modes were investigated, and a parametric study including grating dimensions was carried out to exploit them for blood refractive index sensing with higher Sensitivity (S) and Figure Of Merit (FOM). The performances obtained by FDTD and FMM calculations are the highest level reached, with Q values, sensitivities, and FOM values provided.
Article
Optics
Daan Lenstra, Alexis P. A. Fischer, Amani Ouirimi, Alex Chamberlain Chime, Nixson Loganathan, Mahmoud Chakaroun
Summary: This paper introduces a simple model for electrically pumped organic diode lasers, which predicts the threshold and characteristics of laser operation, including relaxation oscillations and linewidth narrowing. The prospect for continuous wave steady-state laser operation is also discussed.
Article
Optics
Fadhila Chehami, Zahia Kebci, Abderrahmane Belkhir, Fadi Issam Baida, Omar Lamrous
Summary: Through optimizing design parameters, our new light-focusing nano-coupler based on tapered C-shaped silver waveguides demonstrates efficient sub-wavelength light focusing and functional performance at multiple wavelengths.
APPLIED PHYSICS B-LASERS AND OPTICS
(2021)
Article
Materials Science, Multidisciplinary
Amani Ouirimi, Alex Chamberlain Chime, Nixson Loganathan, Mahmoud Chakaroun, Alexis P. A. Fischer, Daan Lenstra
Summary: In this study, a new model for the organic laser diode is proposed based on rate equations for polarons, singlet and triplet excitons, and photon densities. The model is experimentally validated in the context of pulsed nanosecond electrical excitation of high-speed mu-OLEDs. The crucial role of residual absorption in setting the laser threshold and the presence of damped relaxation oscillations in the GHz regime under short electrical nanosecond pulse excitation are elucidated.
ORGANIC ELECTRONICS
(2021)
Article
Optics
Amani Ouirimi, Alex Chamberlain Chime, Nixson Loganathan, Mahmoud Chakaroun, Daan Lenstra, Alexis P. A. Fischer
Summary: This study addresses the challenge of designing and fabricating high-quality factor cavities for organic laser diodes. The authors present the design of DFB micro-cavities and validate their performance under optical pumping. The results show that DFB micro-cavities with optimal resonance wavelength can emit laser under optical pumping.
Article
Materials Science, Multidisciplinary
Mohamed Nihal Munshi, Nixson Loganathan, Mahmoud Chakaroun, Benoit Racine, Luc Maret, Alexis P. A. Fischer
Summary: We propose a heuristic approach to optimize the bandwidth of organic light-emitting diodes (OLEDs) in the field of visible light communication. By utilizing a vector network analyzer and an optoelectronic loop, we are able to directly visualize the effects of stack modifications on the optical bandwidth of high-speed OLEDs and identify relevant parameters. Our experiments show that reducing the active area of OLEDs and removing the hole blocking layer can increase the bandwidth.
ORGANIC ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Macilia Braik, Idrissa Sow, Jaysen Nelayah, Abderrahmane Belkhir, Marco Faustini, Silvana Mercone, Sophie Nowak, Philippe Decorse, Jean-Yves Piquemal, Nordin Felidj
Summary: The study focuses on evaluating the plasmonic properties of cobalt at the nanoscale through the use of NP regular arrays, showing that these NPs exhibit efficient plasmonic properties across a wide spectral range from UV to NIR when the inter-particle distance is properly selected. This research may lead to potential applications in integrated photonic devices for telecommunications.
Article
Chemistry, Multidisciplinary
Iman Ragheb, Macilia Braik, Stephanie Lau-Truong, Abderrahmane Belkhir, Anna Rumyantseva, Sergei Kostcheev, Pierre-Michel Adam, Alexandre Chevillot-Biraud, Georges Levi, Jean Aubard, Leila Boubekeur-Lecaque, Nordin Felidj
Article
Engineering, Electrical & Electronic
Jeanne Solard, Mahmoud Chakaroun, Azzedine Boudrioua
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2020)
