Article
Chemistry, Multidisciplinary
Xing Yang, Liangjun Lu, Yu Li, Yue Wu, Ziquan Li, Jianping Chen, Linjie Zhou
Summary: Integrated Mach-Zehnder interferometers (MZIs) with phase-change materials offer low power consumption and compact size for reconfigurable photonic processors. However, they suffer from low optical extinction ratio and limited switching cycles due to material loss and poor reversible repeatability. A non-volatile electrically reconfigurable MZI with a low-loss phase-change material (Sb2Se3) encapsulated in Al2O3 layers is demonstrated. By dividing the Sb2Se3 patch into small sub-cells to restrict material reflow, more than 10,000 reversible phase-change cycles and 6-bit multilevel switching states are achieved.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Kuilong Song, Qing Ai, Yanming Guo, Ming Xie, Yong Shuai
Summary: A nonvolatile tunable wavelength-selective emitter (Au-GST-Au structure) based on Fabry-Perot resonance theory is demonstrated by incorporating the nonvolatile phase-changing material Ge2Sb2Te5 (GST). An algorithm based on Bayesian optimization and transfer matrix method for optimal design is proposed. The influences of amorphous proportion and layer thickness on tunability and emission spectrum are studied. An objective function considering wavelength-selectivity and tunability is proposed. The optimal structure can be realized within calculations for less than 0.027% of total candidate structures. When the weight w = 0, the optimal structural parameters are d(Au) = 0.0018 μm and d(GST) = 0.4318 μm; and the effect of the weight factor in the objective function is also investigated.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Aheli Ghosh, Alex S. Weidenbach, Bill Zivasatienraj, Timothy M. McCrone, W. Alan Doolittle
Summary: Memristors based on intercalation-driven lithium niobite (LiNbO2) have emerged as a promising option for developing neuromorphic hardware platforms. These memristors offer advantages such as large analog conductance tunability, wide resistance range, and low-power neuromorphic functionality resembling synaptic weight updates. However, there is limited understanding of their frequency response, which is a crucial characteristic for adaptive learning in neural networks. This study evaluates the tunable frequency dependence of resistance modulation in LiNbO2 memristors, enabling the identification of design rules for future scalable multifunctional memristive systems in neuromorphic computing applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Chemistry, Multidisciplinary
Yue Pang, Yaoqiang Zhou, Lei Tong, Jianbin Xu
Summary: This study presents a molybdenum disulfide (MoS2) asymmetric-dual-gate field-effect transistor (ADGFET) with independently controlled double gates, which can achieve logic function, nonvolatile memory, and tunable photoresponse. The multifunctional applications demonstrate that the ADGFET provides a feasible way to integrate logic, memory, and sensing into one device architecture.
Review
Chemistry, Multidisciplinary
Yangtai Hao, Jianye Gao, Yonggang Lv, Jing Liu
Summary: This article provides a comprehensive review of the low melting point alloy (LMPA)-enabled stiffness tunable materials. It discusses the material systems, regulation strategies, stiffness regulation modes, and applications of LMPA-enabled stiffness tunable materials. The article also offers a perspective on the potentials and challenges of these materials.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Optics
Xing Yang, Muhammad Shemyal Nisar, Wei Yuan, Fengang Zheng, Liangjun Lu, Jianping Chen, Linjie Zhou
Summary: This Letter demonstrates a 2 x 2 nonvolatile silicon Mach-Zehnder optical switch enabled by low-loss phase change material Sb2S3, which can switch optical transmission between bar and cross paths without requiring static power to maintain the phase state. It shows promising applications in optical switch matrices and reconfigurable optical circuits.
Article
Materials Science, Multidisciplinary
Zuoxu Wu, Xiaodong Wang, Shuaihang Hou, Yijie Liu, Zunqian Tang, Li Yin, Youwei Qiao, Jian Wang, Xingjun Liu, Jun Mao, Qian Zhang, Feng Cao
Summary: This study investigates the optical properties of the conjugated polymer PEDOT:PSS and demonstrates that its infrared emissivity can be easily modulated by regulating the PSS doping level in PEDOT:PSS. The metallic infrared optical properties of PEDOT:PSS can be weakened by increasing the PSS doping level, resulting in a significant modulation in infrared radiation. The effective model proposed in this study not only reveals the IR optical characteristics of PEDOT:PSS but also enables scalable thermal camouflage compatible with various application environments.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
M. Pourmand, P. K. Choudhury, Mohd Ambri Mohamed
Summary: The study investigates the optical response of metal-dielectric stacks-based cavity structures embedded with graphene microheaters for perfect absorption. By manipulating the refractive indices and crystallinity ratio of GST layers through external electrical pulses, >99% perfect absorption is achieved in the visible and infrared spectrum. The proposed configuration allows for independent transition states for each GST layer, extending absorption from visible to infrared and broadening/red-shifting perfect absorption peaks.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Composites
Lanlan Hu, Wulin Yang, Jiajun Zhu, Licai Fu, Deyi Li, Lingping Zhou
Summary: A novel thermal conductive and electrical insulation composite paper was reported, which enhanced the thermal conductivity and insulation properties by bridging boron nitride nanosheets (BNNS) and silicon carbide wires (SiCw) through sintered silver nanoparticles (AgNPs). The results provide a promising strategy to improve the thermal conductivity of composites and have potential applications in electronic packaging.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Ceramics
Aitana Tamayo, Ma Angeles Rodriguez, Fausto Rubio, Juan Rubio
Summary: Researchers have found that CDCs prepared at 700 and 800 degrees Celsius are dominated by linear graphitic domains and barrel-like structures. These barrel-like structures provide increased specific capacitance, but the high anisotropy of the structure compromises the energy density.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Jiawen Zhou, Cheng Wang, Ming Song, Xianhui Chen, Weidong Xia
Summary: An atmospheric non-thermal arc plasma source based on magnetically stabilized gliding arc discharge was developed for the continuous preparation of ultrafine amorphous silicon carbide (a-SiC) nanoparticles via hexamethyldisilane decomposition. The synthesized nanoparticles showed strong blue-green light emission and had abundant functional groups and oxidized overlayers on their surface. Low input energy favored the synthesis of a-SiC nanoparticles, while high input energy promoted the transition from amorphous structure to b-SiC.
Review
Chemistry, Multidisciplinary
Tuan Kien Nguyen, Sadegh Aberoumand, Dzung Viet Dao
Summary: This review discusses the latest advances and advantages of silicon-based and silicon carbide-based supercapacitors in the field of energy storage, as well as future research directions.
Article
Materials Science, Ceramics
Xiaoyang Ji, Zhe Cheng, Ella K. Pek, David G. Cahill
Summary: In this study, the thermal conductance of the oxide layer and the thermal conductivity of SiC/SiC composites were mapped with high spatial resolution using time-domain thermoreflectance (TDTR). It was found that the dominant source of noise in the measurements was the input noise of the preamplifier under low laser powers or small integration time constants. The thermal conductance of the oxide on the fiber region was lower than that on the matrix due to slight differences in thickness and thermal conductivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Xingang Wang, Chenyang Zhang, Kai Wang, Yuqing Huang, Zhongfa Chen
Summary: This study prepared microcapsules containing phase change materials with high efficiency of photothermal conversion through ultrasonic dispersion and in-situ polymerization, and found that the addition of appropriate nano silicon carbide can increase thermal conductivity and leakage prevention performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Kuan-Yu Chen, Prabhat K. Tripathy, Kunal Mondal, Hongliang Zhang, Adrien Couet, Joseph B. Andrews
Summary: Silicon carbide nanowires (SiC NWs) have the potential to enable the development of solution-processable electronics in harsh environments. The use of nanoscale SiC allows for dispersion in liquid solvents while retaining the resilience of bulk SiC. This study demonstrates the fabrication of SiC NW Schottky diodes and investigates their performance under elevated temperatures and proton irradiation, showing high-temperature tolerance and irradiation resistance.
Article
Chemistry, Multidisciplinary
Hong Liu, Chao Xu, Qundong Xia, Yunbin Ying, Qiang Li, Xiaoyu Zhao, Yongjun Zhang, Shikuan Yang
Summary: In this study, a new type of structural color material is reported, which is achieved by filling polystyrene nanospheres into silver brochosomes. The color is originated from the enhanced electromagnetic resonances of the polystyrene nanospheres by the surrounding metallic nanobowls. The color can be modified by tuning the diameter of the polystyrene nanospheres through plasma etching treatment. This material exhibits promising applications in the field of structural colors due to its simple fabrication process and easy processability.
Article
Chemistry, Multidisciplinary
Shitong Wang, Lijiang Zhao, Yanhao Dong, He Zhu, Yang Yang, Haowei Xu, Baoming Wang, Yakun Yuan, Yang Ren, Xiaojing Huang, Wei Quan, Yutong Li, Yimeng Huang, Charles M. Settens, Qi He, Yongwen Sun, Hua Wang, Zunqiu Xiao, Wenjun Liu, Xianghui Xiao, Riqiang Fu, Qiang Li, Yong S. Chu, Zhongtai Zhang, Qi Liu, Andrew M. Minor, Junying Zhang, Zilong Tang, Ju Li
Summary: Wadsley-Roth oxides (WROs) with pore diameters of 2.5 angstrom < d < 2.8 angstrom allow rapid diffusion of Li+ in single-crystal particles, enabling high-rate charge cycles similar to gasoline vehicles and improving the cycle life up to 10,000 cycles.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Optics
Ni Tang, Jiyong Wang, Baofeng Zhang, Hao Chen, Min Qiu
Summary: To meet the requirements of high brightness color displays and high signal-to-noise ratio camera sensors, adding a white subpixel to the traditional red, green, and blue subpixels is necessary. Conventional RGB to RGBW conversion algorithms face issues like reduced chroma of highly saturated colors and complicated coordinate transformations between RGB and CIE color spaces. In this study, a complete set of RGBW algorithms was developed to digitally code colors in CIE-based color spaces, eliminating the need for complex processes such as color space transformations and white balancing. The algorithm enables accurate manipulations of digital colors for RGBW sensors and displays.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2023)
Article
Engineering, Electrical & Electronic
Jinyu Guo, Tao Liu, Shuoqiu Tian, Wentao Yuan, Rui Zheng, Shan Wu, Ding Zhao, Yifang Chen, Min Qiu
Summary: This paper presents a new design of metallic cross annular hole array for developing optical filters in the mid-infrared band of 4-10 μm. The effects of structural dimensions on filtering performance were investigated through numerical simulations and optical characterizations. By using a thick Au film and ice lithography, the problem of low spectral resolution was tackled and high performance filters with dense elements in an array were successfully fabricated.
MICROELECTRONIC ENGINEERING
(2023)
Article
Optics
Jianghui Liu, Qiang Li, Junbo Liu, Song Hu, Chunchao Qi
Summary: In this work, a structure-illumination based wafer focus measuring system (SI-WFMS) was proposed, which can measure the vertical defocus distance of the exposure area with less than 0.06 μm error in a single-step sampling process. The SI-WFMS can also rapidly measure the surface profile and tilt angle of the wafer, saving measuring time and improving manufacturing efficiency.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Physics, Applied
Wei Lyu, Weiwei Tang, Wei Yan, Min Qiu
Summary: It has been reported that nanosecond light pulses can generate elastic waves to drive nanomotion of micro-objects on frictional solid interfaces. In this paper, a comprehensive theoretical analysis is presented to clarify the physics behind this technique. The results reveal the essential factors: the use of short light pulses for rapid thermal expansion and the timescale asymmetry in thermal heating and cooling. The insights gained from this analysis could be applied to micro- and nanoscale optical waveguides and offer theoretical guidelines for optical manipulation on solid interfaces with light-induced elastic waves.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Jianbo Yu, Rui Qin, Yunbin Ying, Min Qiu, Qiang Li
Summary: This study presents a general strategy for achieving asymmetric directional thermal emission in reciprocal systems, and demonstrates its effectiveness experimentally. This has significant implications for the development of ultrathin customized thermal sources and other thermal-engineering applications.
ADVANCED MATERIALS
(2023)
Article
Optics
Yining Zhu, Wenjuan Wang, Yiwei Zhou, Rui Qin, Bing Qin, Tianze Zhou, Min Qiu, Qiang Li
Summary: Personal thermal management is a topic of growing interest due to climate anomalies and the focus on physical health. A colored textile based on woven cloth is developed, which has superior passive radiative heating capability while maintaining aesthetics. By coating infrared transparent inorganic nanoparticles on MXene-decorated cotton, the textile achieves desired color, high near-infrared absorptivity, low mid-infrared emissivity, and wearability. Thermal tests demonstrate significant temperature increases compared to pure cottons, making this textile suitable for energy conservation and multi-spectral camouflage.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yunbin Ying, Jianbo Yu, Bing Qin, Meng Zhao, Tianze Zhou, Weidong Shen, Min Qiu, Qiang Li
Summary: This paper introduces a strategy for achieving ultra-broadband directional thermal emission matching the atmospheric window by combining Fabry-Perot resonances and the Brewster effect. The planar system exhibits high p-polarized emissivity at specific directions covering the entire atmospheric window and high omnidirectional emission in the non-atmospheric window for simultaneous efficient radiative cooling. It also has the capability for information encryption and anti-snooping in the infrared range.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Sergei Li, Binze Ma, Qiang Li, Mikhail V. Rybin
Summary: The utilization of photonic bound states in the continuum(BIC) is a promising approach for various applications requiring efficient resonators. By perturbing the system with an asymmetry parameter, high-Q modes related to symmetry-protected BIC can be formed, with smaller asymmetry leading to larger Q factors. However, fabrication imperfections hinder precise control of the Q factor through the asymmetry parameter. In this study, we propose an antenna-based design of metasurfaces that enables accurate tailoring of the Q factor, while using equipment with lower tolerance for fabrication.
Article
Optics
Lei Zhang, Xinyu Sun, Hongyan Yu, Niping Deng, Feng Qiu, Jiyong Wang, Min Qiu
Summary: In this study, a compact electro-optic modulator is integrated on the endfaces of a single-mode optical fiber jumper for fast amplitude modulations. It utilizes ultrathin and high quality-factor plasmonic metasurfaces, nanofabrication-friendly and highly efficient EO polymers, and coupling-free connections with fiber networks. The modulator allows dual-band operations and high-speed modulations.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Yining Zhu, Yiwei Zhou, Bing Qin, Rui Qin, Min Qiu, Qiang Li
Summary: A nanophotonic-based night-time warming strategy is proposed, which passively inhibits thermal radiation of objects while actively harnessing that of atmosphere. By using a photonic-engineered thin film, it achieves significant temperature rise and low heat loss.
LIGHT-SCIENCE & APPLICATIONS
(2023)
