Article
Multidisciplinary Sciences
Young-Hoon Kim, Yaxin Zhai, Haipeng Lu, Xin Pan, Chuanxiao Xiao, E. Ashley Gaulding, Steven P. Harvey, Joseph J. Berry, Zeev Valy Vardeny, Joseph M. Luther, Matthew C. Beard
Summary: Traditional optoelectronic approaches rely on both electrical and magnetic fields to control spin, charge, and light, while the use of chiral-induced spin selectivity (CISS) technology allows for the fabrication of a spin-LED that operates at room temperature without the need for magnetic fields or ferromagnetic contacts.
Article
Crystallography
Srinivas Gandrothula, Haojun Zhang, Pavel Shapturenka, Ryan Anderson, Matthew S. Wong, Hongjian Li, Takeshi Kamikawa, Shuji Nakamura, Steven P. DenBaars
Summary: Research showed that edge-emitting laser diodes fabricated on a reduced dislocation density epitaxial lateral overgrown wing can achieve laser action. Two types of facet feasibility studies were conducted, with results showing that facet LDs formed on wafers through reactive ion etching demonstrated laser action.
Article
Materials Science, Multidisciplinary
Junpei Sonehara, Michael Kammermeier, Dai Sato, Daisuke Iizasa, Ulrich Zulicke, Shutaro Karube, Junsaku Nitta, Makoto Kohda
Summary: The anisotropic spin dynamics in wires based on a [001]-oriented semiconductor quantum well were investigated, revealing that the spin relaxation time is longest for the in-plane magnetic field perpendicular to the spin-orbit field, while the shortest for the parallel configuration. The precession frequency exhibits opposite symmetry, allowing for the evaluation of spin-orbit coefficients and a greater understanding of quantum and topological information in semiconductor one-dimensional wires.
Article
Optics
Dan Li, Jing Li, Wei Huang, Yonghui Fan, Chen Tan, Chuanhao Yu, Shiti Huang, Jia Li, Wanqing Zhao, Yifei Xia, Bing Zhang, Xiaoyan Gui, Li Geng
Summary: We present and demonstrate an integrated approach to make low-cost high-speed half-duplex optical transceiver with rapid reconfigurability. This approach utilizes a single DFB diode as the unified E/O-O/E device and includes a custom-designed reconfigurable CMOS chip that provides the biasing and signal path for the DFB diode. The transceiver front-end operates up to 5 Gb/s and has a reconfiguration time of less than 131 ns, making it suitable for the future fiber-to-everything paradigm shift.
Article
Optics
Dan Li, Jing Li, Wei Huang, Yonghui Fan, Chen Tan, Chuanhao Yu, Shiti Huang, Jia Li, Wanqing Zhao, Yifei Xia, Bing Zhang, Xiaoyan Gui, Li Geng
Summary: We propose and demonstrate an integrated approach for making low-cost, high-speed half-duplex optical transceivers with rapid reconfigurability. By using a single Distributed-Feedback (DFB) diode as the unified E/O-O/E device, which can function as a laser or a photodetector depending on the transmitter or receiver mode. The bias for the DFB and the T/R signal path are provided by a custom-designed reconfigurable CMOS chip, enabling high-speed signal transmission and rapid reconfiguration.
Article
Engineering, Electrical & Electronic
Yibo Ma, Xiaodong Zhang, Haiyu Qiu, Jing Guo, Chuan Tian, Liqiang Zheng, Chong Shen
Summary: Great success has been achieved in the development of red, green, blue, and near-infrared emitting perovskite light-emitting devices (LEDs). However, red perovskite LEDs face challenges due to halide separation under high bias voltage. This study reports the manufacture of stable red LEDs based on ternary manganese halide CsMnBr3, which solves the problems of color instability and lead toxicity faced by perovskite red LEDs. The LEDs show improved quantum efficiency and long-term stability, making them compatible with practical applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Physics, Applied
Tianhao Jiang, Jian Wang, Jiaqi Liu, Meixin Feng, Shumeng Yan, Wen Chen, Qian Sun, Hui Yang
Summary: Semiconductor nano-membranes offer a new approach to improve the performance of optical devices. In this study, we present a fabrication method for GaN-based LED membranes, which includes the complete device structure including contact metals from Si substrate. The method involves electrochemical etching of the highly conductive AlN/Si interface, which is naturally formed in GaN-on-Si materials. Photoluminescence and Raman scattering spectra show reduced internal stress, and electrical measurements demonstrate decreased leakage current and series resistance, indicating the successful preservation of the whole structure.
APPLIED PHYSICS EXPRESS
(2022)
Article
Physics, Applied
Kohei Etou, Satoshi Hiura, Soyoung Park, Kazuya Sakamoto, Junichi Takayama, Agus Subagyo, Kazuhisa Sueoka, Akihiro Murayama
Summary: The spin-transport properties in an In0.5Ga0.5As quantum dot (QD) spin LED are affected by temperature and bias voltage, influencing spin polarization and spin relaxation. Spin polarization increases with temperature, but may decrease at higher temperatures and voltages. The electric field and temperature can enhance spin relaxation in the undoped GaAs barrier.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Multidisciplinary
Xihan Chen, Haipeng Lu, Kang Wang, Yaxin Zhai, Vladimir Lunin, Peter C. Sercel, Matthew C. Beard
Summary: Metal-halide perovskite semiconductors show potential for opto-spintronic applications by manipulating charge and spin degrees of freedom to reduce power consumption and achieve faster switching times. Tuning excitation density and exciton binding energy can lead to long spin lifetimes in these systems, with different mechanisms dominating at low and high excitation densities.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Robin P. Hansen, Yuqin Zong, Amit Agrawal, Elias Garratt, Ryan Beams, Jerry Tersoff, Michael Shur, Babak Nikoobakht
Summary: The study focuses on sub-micron-size light sources and demonstrates that the fin light-emitting diodes (LEDs) can achieve high output powers at high current densities. Research shows that fin LEDs can generate narrow-band ultraviolet emission at high current densities and maintain high electrical efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Jose P. S. Cardoso, Maria Rosario Correia, Remy Vermeersch, Dirkjan Verheij, Gwenole Jacopin, Julien Pernot, Teresa Monteiro, Susana Cardoso, Katharina Lorenz, Bruno Daudin, Nabiha Ben Sedrine
Summary: Europium-implanted AlN nanowire pn junctions were annealed at 1000 degrees C and showed increased Eu3+ luminescence intensity with higher fluence, while the contribution from defect-related emissions decreased. This study demonstrates the potential of using Eu-implanted AlN NWs for developing red LEDs with improved luminescence properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Pengwei Gong, Xiaolin Zhang, Fangqi Liu, Sicong Zhu
Summary: With the continuous development of spintronics technology, a new type of spin rectifier diode has been proposed and showed high rectification efficiency in experimental research. This research provides a new solution for the application of spintronic devices.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Chemistry, Physical
Friedhard Roemer, Martin Guttmann, Tim Wernicke, Michael Kneissl, Bernd Witzigmann
Summary: Over the years, light-emitting diodes (LED) made of GaN and its related ternary compounds have become a key technology in lighting, especially visible LEDs. However, research on deep UV LEDs is still ongoing. Designing high-efficiency LEDs requires consideration of factors such as material polarisation and free hole density.
Article
Chemistry, Physical
Xinsu Zhang, Yujuan Chen, Linyuan Lian, Zizhen Zhang, Yixuan Liu, Li Song, Chong Geng, Jianbing Zhang, Shu Xu
Summary: A surface passivation method using trioctylphosphine has been reported to improve the air stability and quantum efficiency of PbS quantum dots, protecting them from degradation and oxidation. This strategy shows promising potential for practical optoelectronic applications of PbS QDs.
Article
Engineering, Electrical & Electronic
Jesse T. Kemmerling, Rian Guan, Mansura Sadek, Sundar Isukapati, Woongje Sung, Sang-Woo Han, Rongming Chu
Summary: This is the first controlled experimental study on the impact of charge-balance on static and dynamic characteristics of GaN super-heterojunction Schottky barrier diodes. The results show that optimizing charge balance can improve the performance of dynamic R-ON degradation and breakdown voltage. The experiment demonstrates excellent performance under the near-optimum charge-balance condition.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Biochemical Research Methods
Yu-Feng Chien, Jyun-Yi Lin, Po-Ting Yeh, Kuo-Jen Hsu, Yu-Hsuan Tsai, Shih-Kuo Chen, Shi-Wei Chu
Summary: By integrating GRIN and TAG lenses into 2PM, this study has significantly improved penetration depth and volume-imaging rate, allowing the study of neural connections and activities in deep-brain regions with high spatiotemporal resolution.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Chemistry, Multidisciplinary
Yi-Chia Luo, Yu-Cian Fu, Hung Yann, Chung-Yuan Mou, Yi-Hsin Liu
Summary: Mesopore-confined cobalt catalysts are utilized to regulate diameters and chirality of single-walled carbon nanotubes through CO disproportionation. Different synthetic strategies affect the growth of SWCNTs with varying diameters and distributions, while Raman and photoluminescence excitations correlate with the properties of SWCNTs. Informative X-ray absorption experiments reveal the effects of H-2 pretreatment on the cobalt catalysts. The CO disproportionation reaction enables suitable confined growth of SWCNTs via co-condensation of cobalt catalysts into mesoporous materials.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Yi-Tzu Lin, Jingling Yang, Chung-Yuan Mou
Summary: A nano-confined catalytic system incorporating ultrasmall Au nanoparticles and highly dispersed phosphotungstic acid was demonstrated to efficiently convert glycerol to formic acid with a selectivity of up to 79.2%. This system offers potential for commercial application in converting glycerol to formic acid.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Yu-Chien Huang, Te-Hsin Chen, Jz-Yuan Juo, Shi-Wei Chu, Chia-Lung Hsieh
Summary: A study demonstrated optical widefield interferometric photothermal microscopy for visualizing and quantifying heat generation of single nanoparticles with high sensitivity; the photothermal signal of small metallic nanoparticles was determined by the amount of dissipated heat, independent of particle size; for larger nanoparticles, the strong scattered light of the particle enhanced the photothermal signal by interfering with the scattered field of the thermal lens.
Article
Chemistry, Physical
Chang-An Lo, Chiao-Chun Chang, Yi-Wei Tsai, Shi-Kai Jiang, Bing Joe Hwang, Chung-Yuan Mou, Heng-Liang Wu
Summary: The study demonstrated the use of mesoporous silica thin films as a substrate for anode-free lithium metal batteries, improving the stability and performance of Li metal electrodes. The design controls the Li electrodeposition process and enhances the performance of LiFePO4 cathodes, showing significant impact over 100 cycles.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Engineering, Chemical
Geng-Sheng Lin, Jingling Yang, Chung-Yuan Mou, Kuo-Lun Tung
Summary: The study demonstrated the high performance of vertically aligned E-MSTF-LTA membrane in organic solvent nanofiltration, with excellent ethanol permeance and high acetone permeance, as well as high solute rejection rate. Viscosity plays a key role in solvent permeation, while the size exclusion effect dominates solute rejection.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Chien-Hsuan Li, Yu-Lung Tang, Junichi Takahara, Shi-Wei Chu
Summary: The research reveals a giant nonlinearity of scattering from a single silicon nanostructure by combining Mie resonance enhanced photo-thermal and thermo-optic effects. It is demonstrated that the nonlinear effect is the coupled consequence of the red shift between scattering and absorption spectra. This work offers a quantitative analytic model to better understand the complete photo-thermo-optic properties of silicon nanostructures, providing a new perspective toward practical silicon photonics applications.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Xiangang Huang, Gongwei Wu, Chuang Liu, Xianwu Hua, Zhongmin Tang, Yufen Xiao, Wei Chen, Jun Zhou, Na Kong, Peng Huang, Jinjun Shi, Wei Tao
Summary: This study presents a novel approach using an intercalation-driven siRNA nanogels (NG) as a delivery vehicle, which demonstrates good stability and efficient intracellular delivery for cancer therapy.
Review
Cardiac & Cardiovascular Systems
Wei Chen, Maaike Schilperoort, Yihai Cao, Jinjun Shi, Ira Tabas, Wei Tao
Summary: Nanotechnology has the potential to improve our understanding of the pathophysiology of atherosclerosis and contribute to the development of novel diagnostic and therapeutic strategies. Targeted nanoparticles for macrophages offer more precise imaging and treatment methods. Future directions include accelerating the clinical translation of nanomedicine for the treatment of atherosclerosis.
NATURE REVIEWS CARDIOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Qingming Zhang, Xiaoxia Zhou, Zhaoyu Kuang, Yi Xue, Chengjin Li, Min Zhu, Chung-Yuan Mou, Hangrong Chen
Summary: The study confirmed the high performance of the Bi-Bi2O3/ZnO/p-Si photocathode in the CO2 reduction reaction through a series of experiments, which not only improved the light absorption capacity, but also increased the selectivity of CO2 reduction products. Furthermore, this material showed high stability and photoelectrochemical activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Guan-Jie Huang, Hao-Yu Cheng, Yu-Lung Tang, Ikuto Hotta, Junichi Takahara, Kung-Hsuan Lin, Shi-Wei Chu
Summary: Nonlinear silicon nano-photonics has gained significant attention for its electric and magnetic Mie resonances that enhance optical nonlinearities. This study reveals a transient nonlinearity in nano-silicon Mie-resonators, where the relaxation lifetime depends on the pump fluence. The researchers found diverse nonlinearities, including sub-linear, super-linear, and full saturation effects, which can be temporally tuned and have potential applications in all-optical signal processing and nano-imaging.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Danni Zhong, Dongxiao Zhang, Wei Chen, Jian He, Chaojie Ren, Xingcai Zhang, Na Kong, Wei Tao, Min Zhou
Summary: The innovative strategy of oral drug delivery using a formulation based on Spirulina platensis loaded with curcumin shows promise for treating intestinal diseases. The formulation not only improves drug bioavailability but also demonstrates excellent antitumor and anti-inflammatory efficacy.
Article
Chemistry, Multidisciplinary
Yu-Chien Ko, Chun-Hsiang Hsu, Chang-An Lo, Chun-Ming Wu, Hung-Ling Yu, Chun-Han Hsu, Hong-Ping Lin, Chung-Yuan Mou, Heng-Liang Wu
Summary: In this study, a low-cost carbon material (XU76 carbon) was synthesized as a sulfur host to address the issues of polysulfide dissolution and shuttle effect in lithium-sulfur batteries. XU76 carbon, with high surface area, good electrical conductivity, and optimized distribution of interconnected micromesopores, efficiently traps polysulfide intermediates and improves sulfur redox kinetics. The sulfur-XU76 carbon cathode exhibits excellent cycling stability and high discharge capacity in experimental tests.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Optics
Chang-Ling Chung, Tommaso Furieri, Jyun-Yi Lin, Ting-Chen Chang, Jye-Chang Lee, Yi-Fan Chen, Ming-Kai Pan, Stefano Bonora, Shi-Wei Chu
Summary: To understand brain functions, it is crucial to study functional connectivity among neurons. This study integrates a tunable acoustic gradient lens and an adaptive-optics lens into two-photon microscopy, enabling high-speed and high-contrast optical volumetric imaging of brain tissues.
JOURNAL OF PHYSICS-PHOTONICS
(2022)
Article
Optics
Yi -teng Hsiao, Tsai-ying Wu, Bo-kuan Wu, Shi-wei Chu, Chia-lung Hsieh
Summary: Interferometric scattering (iSCAT) microscopy is a highly sensitive imaging technique that utilizes common-path interferometry to detect the linear scattering fields associated with samples. It enables high-speed and wide-field imaging, allowing for the visualization of nanoscopic cell dynamics and previously undescribed cell activities.