Article
Spectroscopy
Dana Alina Magdas, Camelia Berghian-Grosan
Summary: The development of new approaches for honey recognition, based on spectroscopic techniques, presents a huge market potential especially because of the fast development of portable equipment. The association between Raman spectroscopy and Artificial Intelligence (i.e. Machine Learning algorithms) for food and beverages recognition starts to prove its efficiency, becoming an important candidate for the development of a practical application.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Applied
Wei-li Wang, Jiang-long Lu, Jia-lei Gu, Li-fang Xie, Jing Chang, Bo Zou, Fang-ling Wang, Guo-kun Liu, Zhong-qun Tian
Summary: The dual functions of aconitine, with biological activity and toxicity, often lead to related food poisoning. Fast and accurate qualitative analysis is crucial for tracking the source of poisoning and administering correct treatments. Through the use of Surface-enhanced Raman spectroscopy (SERS), we have developed a highly sensitive and accurate strategy for the trace detection of three similar aconitines. This strategy shows promise for fast and on-site detection of aconitines in the field of food safety or criminal identification.
Article
Physics, Multidisciplinary
Sergey N. Podoynitsyn
Summary: This article introduces a new approach to surface-enhanced Raman spectroscopy (SERS) based on the dependence of the growth rate of characteristic peak intensity on the concentration of substances during rapid coagulation of colloids. The proposed method allows for accurate measurement of substance content and determination of affinity coefficients for the interaction of analytes and colloidal nanoparticles.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Chemistry, Analytical
Bin Wang, Jianyu Zhang, Weijia Li, Yueying Zhang, Tong Wang, Qi Lu, Huaiyuan Sun, Lingchu Huang, Xishuang Liang, Fangmeng Liu, Peng Sun, Geyu Lu
Summary: This study developed an artificial olfaction system using a single mixed potential type gas sensor. By analyzing the Tafel curve, the system can accurately determine the concentration of acetone and ethanol in a vapor mixture. To save time, a finite element model was used to simulate different concentrations of vapor mixtures. Classification algorithms were trained using the Tafel curve data, achieving 99% accuracy in detecting sensor saturation. Regression algorithms were then used to identify acetone and ethanol concentrations, with the most effective being eXtreme Gradient Boosting (XGB) and Gradient Boosting Decision Tree (GBDT). The results showed mean absolute percentage errors of 11.3% for acetone and 23% for ethanol. Overall, using Tafel curves to detect VOC gases is feasible and effective.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Bin Wang, Jianyu Zhang, Weijia Li, Yueying Zhang, Tong Wang, Qi Lu, Huaiyuan Sun, Lingchu Huang, Xishuang Liang, Fangmeng Liu, Peng Sun, Geyu Lu
Summary: This study established an artificial olfaction system based on a single mixed potential type gas sensor. By analyzing the Tafel curve, the system accurately determined the concentration of acetone and ethanol in a vapor mixture. A finite element model was created to efficiently generate Tafel curves for different vapor concentrations, saving time in the testing process. Various classification and regression algorithms were trained using simulated Tafel curve data, with eXtreme Gradient Boosting (XGB) achieving a 99% accuracy in determining sensor saturation and identifying acetone and ethanol concentrations.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Qianwen Yue, Cai Wang, Ke Zhang, Huiyu Wan, Baoliang Sun, Jingguo Wu, Jingyi Sun, Ying Wang
Summary: This study designed a sandwich biosensor based on surface-enhanced Raman scattering to detect inflammatory markers in thoracolumbar fascia. The results showed that the biosensor had high stability and repeatability, which could be helpful for clinical work.
SURFACES AND INTERFACES
(2023)
Article
Spectroscopy
Maogang Li, Yanyan Xu, Jing Men, Chunhua Yan, Hongsheng Tang, Tianlong Zhang, Hua Li
Summary: This study used a hybrid variable selection method based on V-WSP and VIM to improve the quantitative analysis performance of portable laser Raman spectrometer for methanol content in methanol gasoline. Results showed that the RF model based on V-WSP-VIM method achieved better prediction performance, reduced errors, variables, and modeling time compared to the RF model based on raw spectra.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Yamin Lin, Juqiang Lin, Mengmeng Zheng, Wei Gong, Huan Li, Zhengyu Shu, Weiwei Du, Siqi Gao, Yun Yu
Summary: In this study, a novel extraction-isolation albumin analysis method for prostate cancer screening was developed by utilizing the specific adsorption capacity of hydroxyapatite (HAp) combined with surface-enhanced Raman spectroscopy (SERS). The results showed that the HAp flower particles exhibited superior adsorption-release capacity for albumin and could be used for the diagnosis of prostate cancer through SERS spectral analysis. The PLS-SVM model achieved a high diagnostic accuracy of 95.00% for differentiating normal volunteers from prostate patient groups.
ANALYTICA CHIMICA ACTA
(2022)
Article
Optics
Xiaoxue Zhang, Huaizhi Li, Yujia Zhang, Hanbing Qi, Xianzhi Yang, Qiushi Wang, Dong Li
Summary: The study utilized Partial Least Square (PLS) combined with ultraviolet (UV) spectroscopy and mid-infrared (MIR) spectroscopy for quantitative analysis of oil mixture, with the MIR-PLS regression model demonstrating higher accuracy compared to UV-PLS regression model.
Article
Chemistry, Applied
Peipei Fang, Hongpeng Wang, Xiong Wan
Summary: This study introduces a method using laser confocal Raman technique combined with theoretical Raman spectra based on DFT to accurately analyze the molecular differences between extra virgin olive oil (EVOO) and low-cost olive oil, and achieve quantitative analysis using chemometrics.
Article
Food Science & Technology
Sara W. Erasmus, Lisanne van Hasselt, Linda M. Ebbinge, Saskia M. van Ruth
Summary: The color of food affects how products are perceived and valued, with modern consumers preferring vibrant foods. Recent attention has been focused on the adulteration of turmeric with toxic lead chromate, leading to the development of a spectroscopy-based method for rapid detection. Raman spectroscopy shows promise for detecting lead chromate in turmeric powder, but further studies are needed to increase sensitivity.
Article
Energy & Fuels
Enrico R. Malheiro de Oliveira, Caio Henrique Rufino, Pedro Teixeira Lacava
Summary: This study provides an experimental analysis of spray guided direct injection with commercial fuels used in a consolidated market for the use of ethanol. The results indicate that lean combustion can lead to flame instabilities, increased unburned ethanol in exhaust emissions, and reduced engine performance. The study highlights the importance of considering the effects of commercial fuels with high ethanol content on engine performance and emissions.
Article
Biophysics
Sarjana Yadav, Sneha Senapati, Dipen Desai, Shashank Gahlaut, Smita Kulkarni, J. P. Singh
Summary: This study explored the early detection and differentiation of HIV-1 using a surface-enhanced Raman scattering (SERS) platform, with highly optimized silver nanorods array as the substrate. Different HIV-1 subtypes were successfully distinguished without the use of antibodies or intermediary reagents. Additionally, distinct peaks for X4 and R5 tropic strains were captured, showing the potential for tropism-based detection.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Spectroscopy
Xun Qiu, Xingda Wu, Xianglin Fang, Qiuyue Fu, Peng Wang, Xin Wang, Shaoxin Li, Ying Li
Summary: In this study, melanocytes and melanoma cells were classified using Raman spectroscopy and a convolutional neural network model, which has significant implications for the rapid diagnosis and treatment of melanoma.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Multidisciplinary
Suyang Li, Junjie Chen, Wanbing Xu, Biao Sun, Jiechen Wu, Qiang Chen, Pei Liang
Summary: In this study, an efficient hybrid microfluidic chip was designed to prepare uniform Au@Ag core-shell nanoparticles, and DTNB was used as the internal standard tag molecule to prepare Au@DTNB@Ag for SERS detection. The experimental results showed that the homogeneous SERS substrate prepared using a microfluidic chip has potential for sensitive and reliable detection of environmental chemical contaminants.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Materials Science, Ceramics
Jie Zhang, Aifei Wang, Dehua Wang, Qinfeng Xu, Shufang Zhang, Mingliang Liu, Mengmeng Jiao
Summary: This study successfully fabricated high-efficiency blue LEDs using low-temperature synthesis of CsPbBr3 nanoplates, demonstrating advantages such as high quantum efficiency, stable spectral characteristics, and tunable color range.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Applied
Xianlong Zhang, Lihua Fan, Zhuoqun Su, Qinfeng Xu, Lingyi Xi, Lin Li, Yongning Wu, Guoliang Li
Summary: In this study, a sensitive fluorescent clickase-linked immunosorbent assay (FCLISA) platform was established for detection of food allergenic protein using an artificial clickase-catalyzed bio-conjugation strategy. The FCLISA showed high sensitivity and accuracy, with a potential application in food safety assay.
Article
Chemistry, Applied
Jin Liu, Zhuoqun Su, Qinfeng Xu, Yiheng Shi, Di Wu, Lin Li, Yongning Wu, Guoliang Li
Summary: A facile approach was proposed to prepare boric acid-functionalized core-shell structured magnetic covalent organic framework nanocomposites, which showed high stability and magnetic responsiveness. These nanocomposites were applied as a sorbent for magnetic solid-phase extraction of endocrine disrupting compounds from meat samples, displaying low limits of detection and good precision.
Article
Chemistry, Analytical
Ning-Ning Zhao, Xiao-Di Yu, Xiaorui Tian, Qinfeng Xu, Chun-Yang Zhang
Summary: In this study, a mix-and-read assay based on multiple cyclic enzymatic repairing amplification (ERA) was developed for sensitive and rapid detection of mammalian metastasis-associated lung adenocarcinoma transcript 1 (lncRNA MALAT1). This method can be carried out within 10 min under an isothermal condition, making it the fastest and simplest method reported so far for the lncRNA MALAT1 assay.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Zhengyan He, Shufang Zhang, Yanqiang Hu, Quanming Geng, Wenkai Zhao, Dehua Wang, Qian Tao, Qinfeng Xu, Mengmeng Jiao
Summary: Rapid charge transfer at the interfaces in perovskite solar cells is crucial for improving power conversion efficiency and stability. This study introduces a dual interface modification strategy using different phosphonic acid molecules to enhance the interfaces between the SnO2 layer and perovskite layer and between the perovskite layer and hole transport layer. Organic interface modifiers are found to have a significant impact on charge transport and recombination. The optimized device achieved a PCE of 23.37% and maintained high efficiency even after prolonged exposure to UV light and air.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
Mingxing Li, Wenting Liu, Tieshan Yang, Qinfeng Xu, Haifeng Mu, Jing Han, Kunjian Cao, Mengmeng Jiao, Mingliang Liu, Shufang Zhang, Xiaoming Tan, Chuanlu Yang
Summary: The multicolor upconversion luminescence properties of hybrid materials composed of CsPbX3 (X = Br/I) perovskite quantum dots and upconversion nanoparticles (UCNPs) are reported. This achieves stable and bright upconversion luminescence of CsPbX3 perovskite quantum dots under 980 nm excitation. By utilizing UCNPs as a physical energy transfer level, UCNPs/CsPbX3 achieves lower power density excitation compared to the nonlinear upconversion of multi-photon absorption in perovskite, meeting the demand for multi-color upconversion luminescence in optical applications. Combining UCNPs/CsPbX3 with ultraviolet curable resin (UVCR) results in excellent water and air stability, making it suitable for multicolor fluorescent ink in screen printing security labels. The conversion strategy allows the encryption and decryption of messages on the labels using UV light and a 980 nm continuous wave excitation laser as a switch, greatly enhancing forgery difficulty. These findings provide a general method to stimulate photon upconversion and improve the stability of perovskite nanocrystals, with potential applications in anti-counterfeiting.
Article
Chemistry, Analytical
Zi-Yue Wang, Peng Li, Jinping Hu, Qinfeng Xu, Chun-yang Zhang
Summary: A single-molecule fluorescent biosensor is developed for antibody-free detection of locus-specific m6A in cancer cells and tissues. The biosensor utilizes an m6A-sensitive endoribonuclease to identify and cleave unmethylated mRNA, allowing the detection of retained intact m6A-mRNA through sandwich hybrids. The biosensor demonstrates high sensitivity and can be used for monitoring cellular m6A-mRNA expression and distinguishing m6A levels in breast cancer patient tissues.
ANALYTICAL CHEMISTRY
(2023)
Article
Agriculture, Multidisciplinary
Zhiqiang Liu, Guoli Gong, Yanni Li, Qinfeng Xu, Nuraly Akimbekov, Jian Zha, Xia Wu
Summary: In this study, lysostaphin was used to directly digest glycine-rich flexible linkers in fusion proteins without the need for additional amino acids. The digestion efficiency of lysostaphin increased with the length of the linker. Furthermore, lysostaphin could also be used to remove the SUMO domain linked to LwCas13a via an octaglycine linker. These findings demonstrate the potential of lysostaphin as a novel and efficient protease for protein engineering.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Optics
Mingxing Li, Wenting Liu, Tieshan Yang, Qinfeng Xu, Haifeng Mu, Jing Han, Kunjian Cao, Xiaoming Tan, Kai Wang, Chuanlu Yang
Summary: In this study, CsPbBr2Cl@EuMOFs nanocomposites were synthesized and their fluorescence evolution under high pressure was investigated. The synergistic luminescence effect between CsPbBr2Cl and Eu3+ in CsPbBr2Cl@EuMOFs was found to remain stable even under high pressure, with no energy transfer among different luminous centers. These findings provide a meaningful case for future research on nanocomposites with multiple luminescent centers. Additionally, CsPbBr2Cl@EuMOFs exhibit a sensitive color-changing mechanism under high pressure, making them a promising candidate for pressure calibration via the color change of the MOF materials.
Article
Energy & Fuels
Shufang Zhang, Zhengyan He, Yanqiang Hu, Changlin Yao, Wenkai Zhao, Qian Tao, Qinfeng Xu, Mengmeng Jiao, Dehua Wang
Summary: Surface doping of perovskite films using phenylphosphonic acid as a doping agent can improve the efficiency and stability of perovskite solar cells. The PPA molecule can slow down crystal nucleation and growth, resulting in high-quality perovskite films with improved performance.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Spectroscopy
Shuo Yang, Wenzhi Sun, Qinfeng Xu, Chuanlu Yang, Shufang Zhang, Mengmeng Jiao
Summary: Novel green phosphors Sr2Ga2SiO7:Eu2+ and Sr2Ga2SiO7:Ce3+,Tb3+ with intense broad excitation and emission bands were obtained and their luminescence properties were investigated. By codoping Tb3+ with Ce3+ and utilizing the energy transfer mechanism, tunable blue to green emission was achieved. The prepared phosphors exhibited good thermal stability and were used to fabricate green LED devices. These phosphors show potential for solid state lighting applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Multidisciplinary
Duanqi Ma, Yanlin Xu, Qiuying Chen, Huafeng Ding, Xiaoming Tan, Qinfeng Xu, Chuanlu Yang
Summary: This study successfully improves the stability of mixed-halide perovskites by synthesizing PeQDs combined with zinc-based metal organic framework crystals, including photo-, thermal, and long-term stabilities under illumination, enhancing the performance of optoelectronic devices.
Article
Chemistry, Analytical
Su Jiang, Jingyi Ren, Qian Zhang, Wenjing Liu, Hao Liu, Qinfeng Xu, Xiaorui Tian, Chun-yang Zhang
Summary: A dendritic nanoassembly-based fluorescent biosensor is developed for the measurement of PARP-1 in lung tumor tissues. This label-free assay is template-free and electrostatic interaction-independent, with high sensitivity and rapid detection time. It has great potential in PARP-1-related clinical diagnosis and drug discovery.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Qingya Wang, Huafeng Ding, Tieshan Yang, Qinfeng Xu, Haifeng Mu, Taiping Lu, Mengmeng Jiao, Jie Zhang, Kunjian Cao, Zhigang Li, Honggang Wang, Shufang Zhang, Kai Wang, Chuanlu Yang
Summary: This study investigates the differences in structural and photoluminescence (PL) properties of two-dimensional perovskite materials with isomeric organic cations under high pressures. The results reveal the interaction mechanism between organic cations and inorganic layers under compression and provide insights for the rational design of optoelectronic devices incorporating organic spacer cations.
Article
Chemistry, Inorganic & Nuclear
Chunying Tang, Yawei Sun, Jianbiao Liu, Qinfeng Xu, Chun-yang Zhang
Summary: A new iodoargentate complex with semiconducting properties was successfully synthesized, showing excellent ion exchange behavior and promising photocatalytic activity in degrading dyes. The enhanced photocatalytic activity is attributed to the hole structure in the anions of iodoargentates.
DALTON TRANSACTIONS
(2022)
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)
