Article
Optics
M. Rezaei Mirghaed, M. Arshadi Pirlar, M. M. Jahanbakhshian, R. Karimzadeh
Summary: The manipulation of the nonlinear optical response of graphene oxide liquid crystals through a mechanical-hydrodynamical approach has been demonstrated in this study. The experimental results show that increasing the flow rate in the microchannel enhances both linear and nonlinear absorption coefficients, reducing the laser beam transmission through the sample significantly.
Article
Optics
Zhengnan Wu, Yuangang Lu, Jianqin Peng, Jian Huang, Chongjun He
Summary: This study investigates the nonlinear optical limiting effect of novel graphene dispersions and graphene dispersions in carbon tetrachloride at a wavelength of 3.8 pm. The transmittances of graphene dispersions in carbon tetrachloride at different concentrations and solution thicknesses are measured. The experimental data analysis reveals that the main optical limiting mechanism of the new graphene dispersions is Mie scattering, and they can achieve good nonlinear optical limiting effects.
CHINESE OPTICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Di Sun, Yu Fang, Xiaoyan Yan, Wen Shan, Wenjun Sun, Qingyu Meng
Summary: Graphene/MoS2/Ag thin films were successfully prepared using magnetron sputtering and liquid phase exfoliation techniques. The increase in DC magnetron sputtering power led to enhanced local surface plasmon resonance effect of Ag thin films, resulting in improved nonlinear optical properties of the graphene/MoS2/Ag thin films.
FRONTIERS IN MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Li Dong, Hongwei Chu, Xiao Wang, Ying Li, Shengzhi Zhao, Dechun Li
Summary: The study synthesized CuO nanosheets modified by TiO2 nanoparticles and investigated their morphology and structure, demonstrating enhanced nonlinear optical properties through TiO2 doping. The research also showcased the potential of these materials in ultrafast photonics applications.
Article
Nanoscience & Nanotechnology
Zhongzheng Huang, Junku Liu, Tianfu Zhang, Yuanhao Jin, Jiaping Wang, Shoushan Fan, Qunqing Li
Summary: The study showed that graphene/HfO2/Si photodetector has a stronger interfacial gating effect compared to graphene/SiO2/Si. The high efficiency was attributed to the higher interface state density at the HfO2/Si interface and the higher dielectric constant of the HfO2 layer. By utilizing the interfacial gating mechanism, fast response, high photoresponsivity, and ultrabroadband photodetection were achieved simultaneously, offering potential for electronic and optoelectronic applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Mohammad Alidoust, Klaus Halterman
Summary: From a low-energy effective Hamiltonian model, we calculated the dynamical optical conductivity and permittivity tensor of a magnetized graphene layer with Rashba spin-orbit coupling. Our results reveal that the magnetization and SOC can be identified experimentally by two well-separated peaks in the dynamical optical response. Furthermore, our calculations show that the magnetized spin-orbit coupled graphene supports strong handedness-switchings.
Article
Thermodynamics
Yong-Mei Zhang, Mauro Antezza, Jian-Sheng Wang
Summary: The presence of interlayer interactions in twisted bilayer graphene (TBG) enhances several characteristics, including the optical and electronic properties. A series of double magic angles have been theoretically investigated in TBG. The thermal radiation from TBG can be tuned to the far infrared range by changing twist angles.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Multidisciplinary
Jing Huang, Jianqi Li, Yunchang Xiao, Jianying Li
Summary: Here, we investigated the third-order nonlinear optical response of titanium nitride (TiN), an epsilon-near-zero (ENZ) material, in the visible range by using Z-scan method. We obtained a maximum nonlinear absorption coefficient beta of -3.78 x 103 cm/GW at its ENZ wavelength. Furthermore, the carriers dynamic characteristics of TiN are revealed by time-resolved pump-probe measurement, indicating its great potential applications in nonlinear optical and all-optical modulation devices.
Article
Materials Science, Multidisciplinary
Zhengguo Xiao, Yu Fang, Yinglin Song, Yanchao She, Changhai Tian, Jie Zhang, Liqin Cui, Yong Li
Summary: The study synthesized a nitrogen-doped diamond crystal with (111) orientation using NaN3 in the FeNi-C system under high pressure and temperature, demonstrating significant nonlinear absorption properties suitable for ultrafast optical devices.
FRONTIERS IN MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yi Cheng, Wentao Yu, Jin Xie, Ruoyu Wang, Guang Cui, Xu Cheng, Mengwen Li, Kun Wang, Junliang Li, Zhipei Sun, Ke Chen, Kaihui Liu, Zhongfan Liu
Summary: This study proposes a controllable chemical vapor deposition strategy to precisely manipulate the structure and properties of graphene optical fiber, achieving strong and tunable optical nonlinearity. The nonlinear harmonic generations exhibit nearly one order of magnitude enhancement compared to graphene on planar quartz. Moreover, an ultrafast all-fiber laser employing the nonlinear graphene optical fiber as a saturable absorber is demonstrated with high output power and pulse width.
Article
Chemistry, Multidisciplinary
Xingyu Pan, Yanlin Pan, Luyan Shen, Lijun Wang, Rui Wang, Guoen Weng, Jinchun Jiang, Xiaobo Hu, Shaoqiang Chen, Pingxiong Yang, Junhao Chu, Jiahua Tao
Summary: A new close spaced sublimated (CSS) CdS buffer layer is introduced to control the orientation growth of Sb-2(S,Se)(3) absorbers for high-performance solar cells, resulting in enhanced carrier transport and reduced adverse effects.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Xiang Li, Wei Deng, Yun Weng, Jingjing Zhang, Haifang Mao, Wenqian Zhang, Tiandong Lu, Dewu Long, Fei Jiang
Summary: This study proposes a novel strategy to achieve high and stable hydrogen evolution reaction (HER) catalytic performance by designing flower-shaped graphene-coated trimetallic PtCoYOx @G nanoparticles and adjusting their composition ratio. The trimetallic PtCoYOx @G catalyst shows superior HER performance compared to bimetallic PtYO@G catalysts.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Materials Science, Multidisciplinary
Di Sun, Yu Fang, Kun Liu, Runze Ye, Wenjun Sun, Li Zhao
Summary: The Al-doped Sb2Se3 nanofilms exhibit broadband nonlinear response and stronger transient absorption intensity. By controlling the Al dopant content, the nonlinear optical properties can be adjusted, making these films suitable for research on broadband nonlinear photonic devices.
Article
Multidisciplinary Sciences
Axel M. Eriksson, Oriel Shoshani, Daniel Lopez, Steven W. Shaw, David A. Czaplewski
Summary: In contrast to continuous time active feedback control in complex systems, nonlinear dynamics provides a method to generate desired long-term responses using short-time control signals. We demonstrate that a micromechanical resonator can produce diverse, robust dynamical responses on a timescale much larger than the external harmonic driving, and these responses can be selectively controlled by inserting small pulses at specific branching points. We develop a theoretical model and experimentally confirm the ability to control these response patterns. Therefore, these mechanical resonators may serve as a simple physical platform for investigating the nonlinear, flexible, and robust dynamics observed in other fields such as physics, chemistry, and biology.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yang Li, Bo Dong, Enqing Chen, Xiaoli Wang, Ziwan Li, Yudi Zhao, Wei Zhao, Yishan Wang
Summary: A broadband all-optical tunable fiber microcavity filter, based on graphene/epoxy composite, is presented. The microcavity shows excellent all-optical controlability and has a strong optical Kerr effect and photothermal effect induced by the optical pump. The experimental results demonstrate a wavelength tuning range of 25.54 nm and a tuning step of -832 pm/mW.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Tianju Zhang, Chaocheng Zhou, Jia Lin, Jun Wang
Summary: Compared to lead-based perovskites, 2D tin-based perovskites have lower photoluminescence quantum yields and enhanced emission linewidths. The difference in emission properties can be attributed to the stronger exciton-phonon scattering intensity and higher defects density in tin-based perovskites, which significantly broaden the emission linewidth and accelerate the exciton relaxation process, leading to a reduction in photoluminescence quantum yields.
CHINESE OPTICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Tianju Zhang, Chaocheng Zhou, Xuezhen Feng, Ningning Dong, Hong Chen, Xianfeng Chen, Long Zhang, Jia Lin, Jun Wang
Summary: This study investigates the luminescence mechanism of Sn-based perovskites and reveals that deformation potential scattering caused by charged defects dominates the interband relaxation of excitons.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Xin Chen, Jiawei Huang, Chenduan Chen, Meiling Chen, Guohang Hu, Hongqiang Wang, Ningning Dong, Jun Wang
Summary: PdSe2 exhibits significant saturable absorption performance, with a modulation depth of 22.47% at 520 nm. A visible light thresholder based on PdSe2 is proposed to improve signal-to-noise ratio, while the intrinsic recombination mechanism is revealed through pump-probe technique and first-principles calculation.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chaocheng Zhou, Tianju Zhang, Chao Zhang, Xiaolin Liu, Jun Wang, Jia Lin, Xianfeng Chen
Summary: This study demonstrates that a small amount of indium ions can effectively repair defects, improve energy-level alignment, and reduce hot-carrier losses in perovskite solar cells, leading to higher efficiency and stability.
Article
Optics
Jiawei Huang, Ningning Dong, Niall McEvoy, Lei Wang, Hongqiang Wang, Jun Wang
Summary: This study investigates the exciton-like inter-sub-band resonance absorption and optical bleaching of platinum sulfide (PtS) in the resonant region, as well as free-carrier absorption and defect-assisted Auger recombination in the transparent region. The experimental results show good agreement with the theoretical model based on the mid-gap carrier-capture model considering the complex optical conductivity. This work provides a better understanding of the ultrafast photoinduced carrier behavior in PtS and its potential applications in photoelectric devices.
LASER & PHOTONICS REVIEWS
(2022)
Review
Optics
Yu Mao, Lei Wang, Chenduan Chen, Zhan Yang, Jun Wang
Summary: The determination of the number of layers of 2D materials is crucial for controlling the performance of nanoelectronic and optoelectronic devices. Various optical technologies have been proposed to determine the thickness of samples by studying the relationship between the number of layers and optical properties. The rapid growth of 2D materials and heterostructures in the past decade has exceeded the capabilities of traditional experimental and computational methods. Machine learning is emerging as a powerful tool to support these methods and explore the full potential of optical technology.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Mingang Zhang, Xiangdong Xu, Wenjie Hu, Yadong Jiang, Chenduan Chen, Ningning Dong, Jun Wang, Yuning Liang, Baohua Zhu, Han Zhang, Jimmy Xu
Summary: In this study, the third-order nonlinear optical (NLO) absorption properties and ultra-fast carrier dynamics of organic material DAST were investigated. The results showed that DAST exhibited ultra-high nonlinear saturable absorption (SA) responses and reliable long-term stability. These findings are of great significance for the development of high-performance optoelectronic devices based on organic materials in the future.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiawei Huang, Lei Tao, Ningning Dong, Hongqiang Wang, Song Zhou, Jun Wang, Xiaoyue He, Kehui Wu
Summary: This study explores the launching and propagating properties of HPhPs in α-MoO3 along orthogonal crystal orientations using a holey silicon nitride microcavity, providing abundant possibilities for applications and operations in nanophotonics.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Shengqi Zhang, Xiaoyan Zhang, Yi Sun, Wei Zhou, Weimin Cao, Danhong Cheng
Summary: Developing low-cost semiconductor photoanodes is crucial for efficient and stable oxygen evolution reaction in photoelectrochemical water splitting. In this study, nanoparticulate titanium dioxide electrodes were prepared using spin-coating method, and the effects of annealing conditions on their performance were systematically investigated. The results showed that annealing at 450°C in argon atmosphere led to the highest photoelectrochemical performance, attributed to the introduction of oxygen vacancies and improved electron conductivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Multidisciplinary Sciences
Xin Chen, Ivan M. Kislyakov, Tiejun Wang, Yafeng Xie, Yan Wang, Long Zhang, Jun Wang
Summary: The authors report a pulsed laser-induced photoacoustic driving force that can overcome the van der Waals adhesion forces between 2D semimetallic nanosheets and insulating substrates. Optically controlled nanomachine engineering can satisfy the touch-free and non-invasive demands of optoelectronics, nanotechnology, and biology.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Jie Gao, Shengqi Zhang, Xiaoqing Ma, Yi Sun, Xiaoyan Zhang
Summary: Introducing antimonene onto TiO2 nanorod arrays improves the photoelectric conversion efficiency and photocurrent density.
Review
Chemistry, Physical
Yibo Ding, Xiaoqing Ma, Xiaoyan Zhang
Summary: Photocatalysis is a feasible and waste-free technology for converting solar energy. This article presents a green, efficient and sustainable one-step flame-assisted hydrolysis approach for preparing metal oxide-based photocatalysts. The method uses the combustion of alcohol solvent to induce and sustain the hydrolysis process, resulting in metal oxides with microspherical morphology. The review discusses the reaction principles, applications, experimental success factors, and future prospects of this method, providing new ideas and intellectual challenges for efficient catalyst research.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Weiqi Ye, Zhenyu Wu, Shengqi Zhang, Yi Sun, Xiaoyan Zhang, Wei Zhou, Weimin Cao, Tao Wang, Danhong Cheng, Haijiao Xie
Summary: Researchers constructed PtNi alloy nanoparticles with a Pt-rich surface supported on nitrogen-doped carbon through a simple solvothermal method. The synthesized PtNi/NC catalyst showed higher mass activity, specific activity, and positive onset potential compared to commercial Pt/C catalysts. Additionally, it demonstrated excellent stability with only a slight negative shift in half-wave potential after 5000 cycles. This enhanced ORR performance can be attributed to the introduction of Ni into Pt, optimizing the adsorption energy and enhancing the interaction between the metal nanoparticles and the support.
DALTON TRANSACTIONS
(2023)
Article
Optics
Zixin Wang, Xiaowei Ji, Ningning Dong, Chenduan Chen, Zhouyuan Yan, Xun Cao, Jun Wang
Summary: In this study, the changes in the optical properties of VO2 films induced by fs laser were investigated using a variable-temperature Z-scan. The results showed that high-repetition-frequency laser can induce phase transition in VO2, which is reversible and leads to significant changes in the optical properties of the film.
Article
Optics
Wang Zixin, Dong Ningning, Wang Lulu, Cao Xun, Wang Jun
Summary: Semiconductor-metal phase transition in metal oxides, such as vanadium dioxide (VO2), has attracted significant attention due to their scientific significance and potential applications. The phase transition in VO2 can be triggered by various excitations, and the process is reversible and leads to significant changes in optical properties. This makes VO2 widely used in optical switches, smart windows, and laser protection. With the rapid development of femtosecond laser technology, researchers are increasingly interested in studying the laser-induced phase transition of VO2. The ability to control the phase transition on ultrafast time scales using optical means could benefit its applications in memory devices and ultrafast optical switches.
ACTA PHOTONICA SINICA
(2022)
