Article
Spectroscopy
Gregory Hull, Edward D. McNaghten, Paul Coffey, Philip Martin
Summary: The combination of LIBS and LA-TDLAS is useful for isotopic analysis and calculating laser ablation plasma properties. Double-pulsed laser ablation has the potential to enable more isotopic pairs to be analysed due to the narrower absorption linewidth.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Spectroscopy
L. Nagli, A. Prosnyakov, M. Gaft, Y. Raichlin
Summary: By investigating Laser-Induced Breakdown Spectroscopy (LIBS) and Laser-Induced Plasma Lasers (LIPL) in elongated Laser-Induced Plasma (LIP), it is found that their behavior towards ablation laser pulses is similar and they exhibit two peaks in intensity dependencies on laser pulses. The second peak observed at a large number of ablation pulses may be attributed to the thermal properties of the sample, especially thermal capacity and thermal diffusivity.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Chemistry, Multidisciplinary
Peng-Cheng Han, Kun Yang, Lei-Zi Jiao, Hua-Chang Li
Summary: A fast quantitative analysis method for soil potassium using direct-focused laser ablation-laser induced breakdown spectroscopy (direct-focused LA-LIBS) was proposed and tested. The method showed improved stability and lower detection limit compared to traditional LIBS systems. The results were consistent with a standard reference method and the direct-focused LA-LIBS method provided a new approach for rapid detection of nutrient elements in field soils.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Bingyin Lei, Bopin Xu, Jing Wang, Xianglei Mao, Jing li, Yisha Wang, Wei Zhao, Yixiang Duan, Vassilia Zobra, Jie Tang
Summary: Discharge-assisted laser-induced breakdown spectroscopy (D-LIBS) is a highly promising technique in trace detection, but it consumes large amounts of energy causing severe environmental pollution. In this study, a modulation approach based on ion dynamics was demonstrated to reduce energy costs and environmental hazards. This modulation effectively traps and confines charged particles, facilitating electric energy coupling to laser plasma and prolonging plasma lifetime. Compared with conventional D-LIBS, this approach reduces both the electric energy and limit-of-detection by one order of magnitude, while maintaining over two orders of magnitude signal enhancement. With optimized wavelet transform denoising, the sensitivity is approximately two orders of magnitude higher than recently reported levels for typical elements. The low-harm, low-power, and high-sensitivity advantages of this approach pave the way for high-efficiency applications of D-LIBS in rapid and real-time analysis.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Spectroscopy
Jesus M. Anzano, Andres Cruz-Conesa, Roberto J. Lasheras, Cesar Marina-Montes, Luis Vicente Perez-Arribas, Jorge O. Caceres, Abrahan I. Velasquez, Vincenzo Palleschi
Summary: Laser-induced breakdown spectroscopy (LIBS) is a quick technique for analyzing various samples, including geological samples like soils, without the need for standard references. Calibration Free (CF) methodology can be used for multielemental quantitative analysis without standards, by studying the physical parameters of the plasma created by laser-sample interaction. By optimizing instrumental parameters, choosing appropriate spectral lines, and using signal to noise ratio (SNR) evaluation, high-quality spectral results can be obtained for complex samples like Antarctic soils.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Agriculture, Multidisciplinary
Jiang Zhong, Xuming Jiang, Ming Lin, Huiliang Dai, Fengle Zhu, Xin Qiao, Zhangfeng Zhao, Jiyu Peng
Summary: Matcha adulteration poses a significant threat to food production and human health. Laser-induced breakdown spectroscopy (LIBS) combined with chemometric methods was used to swiftly quantify adulterant content in matcha. Fusion of LIBS spectrum and ablation image was employed to quantify the two types of matcha adulteration: mixing Fuding and Jiukeng matcha with barley seedling powder. Support vector machine regression models based on full spectrum, spectral features, and feature fusion achieved the best performance in quantifying matcha adulteration. This study introduces a rapid approach for assessing matcha adulteration.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2023)
Article
Spectroscopy
Huace Wu, Ding Wu, Cong Li, Longfei Li, Xue Bai, Xiaohan Hu, Zhonglin He, Yan Lyu, Ran Hai, Hongbin Ding
Summary: Real-time acquisition of dynamic information on the surface elemental composition of the first wall is crucial for understanding plasma-wall interaction and optimizing experimental conditions in a tokamak. The effect of laser ablation angles (LAAs) on the in-situ laser-induced breakdown spectroscopy (LIBS) system on the EAST upper divertor was evaluated. LIBS experiments were conducted with variable LAAs on tungsten, molybdenum, and copper samples, and their ablation depth and mass were measured. The results showed that larger LAAs improved the depth resolution of LIBS and provided valuable insights for depth-profiling analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Mengyun Hu, Shencheng Shi, Min Yan, E. Wu, Heping Zeng
Summary: The multidimensional-plasma-grating-induced breakdown spectroscopy (MIBS) technique is greatly influenced by laser polarization and inter-pulse delay. Compared to GIBS, MIBS shows a two-fold increase in signal intensity and about a 20% increase in induced plasma lifetime. Furthermore, the limit of detection (LOD) with MIBS is reduced by approximately 22.4 ppm, indicating its promising potential as an alternative method for trace element detection.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Instruments & Instrumentation
Saba Mushtaq, Khurram Siraj, Muhammad Shahzad Abdul Rahim, Sami Ulhaq, Qaneeta Younas, Waqas Asad, Nimra Shahzad, Anwar Latif
Summary: In this study, laser-induced kohl plasma was generated near a transverse magnetic field of 0.8 T. The emission spectra analysis revealed that most of the emission line intensities decreased due to the field, with a few lines showing an increase. Plasma parameters such as electron temperature, electron number density, and plasma frequency were found to increase. The analysis of the kohl emission spectrum detected several elements, including lead and chromium, which may have chronic health effects.
APPLIED SPECTROSCOPY
(2023)
Article
Spectroscopy
Satoshi Yamaguchi, Naoya Nishi, Tetsuo Sakka
Summary: The pulse-to-pulse variation of the emission spectral intensity of underwater laser-induced breakdown spectroscopy was studied, showing that the dispersion of spectral intensity changes with the fluence of the laser pulse. The dispersion at low fluences is mainly attributed to variations in population density and atomic excitation temperature. Additionally, there is a negative correlation between population density and temperature.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Spectroscopy
Jonathan Merten, Erin Nicholas, Shawnda Ethridge, Hannah Bariola, Shealyn Chestnut, Anna Anders, Jackie Brees, Mary Foster
Summary: Atomic absorption spectroscopy was used to measure the absolute masses of vanadium and titanium in the plume formed by laser ablation of a titanium alloy. Using time-resolved Boltzmann plots, the masses and temperatures were measured under pure helium and an 80:20 He/O-2 mixture. The results showed that the plasma composition could be accurately estimated from the ground term. Additionally, the stoichiometry of V:Ti varied depending on the gas composition.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Optics
Xianshuang Wang, Ruibin Liu, Yage He, Ying Fu, Junfeng Wang, An Li, Xueyong Guo, Manman Wang, Wei Guo, Tonglai Zhang, Qinghai Shu, Yugui Yao
Summary: In this study, a micro-scale approach based on radiation spectra and dynamic analysis during the interaction between laser and energetic materials (EMs) was proposed for high-precision diagnosis of explosion parameters. The results revealed a tight correlation between micro-detonation and macroscopic detonation, allowing for the estimation of macroscale detonation performance in a high-speed and high-accuracy manner. This method provides a small-dose, low-cost, and multi-parameter approach to diagnose the performance of EMs in the macroscale domain from the microscale domain.
Article
Chemistry, Analytical
Yarui Wang, Xiaoyong He, Chaoyong Wang
Summary: In this study, a microchip laser-based laser-ablation spark-induced breakdown spectroscopy (LA-SIBS) was developed to quantitatively analyze minor elements in bismuth brass with minimal sample destruction. A simple spark discharge unit and compact multichannel fiber spectrometer were used. The effects of discharge voltage and capacitance of the energy storage capacitor on the signal intensities were investigated. The results demonstrated that spark discharge significantly increased the plasma temperature and improved the analytical sensitivity of the portable LA-SIBS system.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Physics, Fluids & Plasmas
Yongfeng Xu, Liang Yang, Dongjian Zhou, Qingwei Li, Wenbo Shi, Yuqi Jin
Summary: The dependence of propulsion performance generated by laser ablation of polyvinyl chloride on laser energy and pressure was investigated. The results show that the impulse and coupling coefficient have different variations at different pressures. The dynamic behavior and duration of the plasma plume are the factors causing the difference in propulsion performance. The plasma plume lasts longer at high pressures, which is attributed to a higher electron temperature.
PHYSICS OF PLASMAS
(2023)
Article
Physics, Fluids & Plasmas
R. S. Dorst, D. B. Schaeffer, A. Le, J. J. Pilgram, C. G. Constantin, S. Vincena, S. K. P. Tripathi, D. Winske, D. Larson, M. Cowee, C. Niemann
Summary: The laminar coupling between a laser-produced plasma and a background magnetized plasma was investigated through experiments and simulations. The experiments utilized planar laser induced fluorescence diagnostic and magnetic flux probes to study the two-dimensional spatiotemporal evolution of the ion velocity distribution function. The simulations confirmed the observed coupling and the collisionless nature of the process.
PHYSICS OF PLASMAS
(2022)
Article
Chemistry, Physical
Yu Song, Xianfeng Zheng, Weidong Zhou, Michael Lucas, Jingsong Zhang
JOURNAL OF CHEMICAL PHYSICS
(2015)
Article
Physics, Fluids & Plasmas
Wang Zhe, Dong Fengzhong, Zhou Weidong
PLASMA SCIENCE & TECHNOLOGY
(2015)
Article
Physics, Multidisciplinary
Fang-Fang Chen, Xue-Jiao Su, Wei-Dong Zhou
FRONTIERS OF PHYSICS
(2015)
Article
Materials Science, Multidisciplinary
Quanji Wang, Weidong Zhou, Fangfang Chen, Ruizhao Yang
MATERIALS RESEARCH EXPRESS
(2016)
Article
Materials Science, Multidisciplinary
Quanji Wang, Weidong Zhou
Article
Chemistry, Analytical
Weidong Zhou, Xuejiao Su, Huiguo Qian, Kexue Li, Xiafen Li, Youli Yu, Zhijun Ren
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2013)
Article
Chemistry, Analytical
Xuejiao Su, Weidong Zhou, Huiguo Qian
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2014)
Article
Optics
Zhijun Ren, Hongzhen Jin, Yile Shi, Jiancheng Xu, Weidong Zhou, Hui Wang
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2012)
Article
Optics
Youli Yu, Weidong Zhou, Xuejiao Su
OPTICS COMMUNICATIONS
(2014)
Article
Optics
Xuejiao Su, Weidong Zhou, Huiguo Qian
Article
Physics, Fluids & Plasmas
Yu Youli, Zhou Weidong, Qian Huiguo, Su Xuejiao, Ren Ke
PLASMA SCIENCE & TECHNOLOGY
(2014)
Review
Physics, Multidisciplinary
Zhe Wang, Ting-Bi Yuan, Zong-Yu Hou, Wei-Dong Zhou, Ji-Dong Lu, Hong-Bin Ding, Xiao-Yan Zeng
FRONTIERS OF PHYSICS
(2014)
Article
Chemistry, Analytical
Edward Harefa, Weidong Zhou
Summary: Laser-induced breakdown spectroscopy (LIBS) is a method for material classification, but extracting meaningful information from large amounts of spectral data and reducing dimensions is a challenge. This study used manifold dimensionality reduction techniques and a support vector machine model to classify five different types of aluminum alloys. The results showed that non-linear manifold learning techniques can achieve better classification performance.
Article
Spectroscopy
Wu Zhi-wei, Dong Yan-ting, Zhou Wei-dong
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2014)
Article
Spectroscopy
Qian Hui-guo, Zhou Wei-dong
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2012)
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)
