Optical Technology, Semiconductor Materials, and Devices最新文献

{"title":"Up-conversion luminescence properties of Tb3+ doped glass ceramics containing Y2Ti2O7 crystalline phase","authors":"Xinming Yu, Hongbo Zhang, C. Su","doi":"10.1117/12.2668478","DOIUrl":"https://doi.org/10.1117/12.2668478","url":null,"abstract":"In recent years, rare earth doped optical materials have been widely used in w-LEDs, optical displays and lasers. Glass ceramics containing titanate crystal phases are widely used in the matrix of luminescent materials because of their high thermal and chemical stability, excellent luminescence properties, and low phonon energy. However, Y2Ti2O7 with a pyrochlore structure is considered a good up-conversion luminescent matrix owing to its low phonon energy (⪅712 cm-1). By the melt crystallization, Tb3+ doped transparent glass ceramics (GCs) were prepared. Y2Ti2O7 crystal phase in glass ceramics was decided by using x-ray diffraction. The light transmittance of the glass ceramics can reach 71% in the visible region. The emission intensity is the strongest when the doping concentration of Tb3+ is 0.4%. Compared with the precursor glass, glass ceramics have higher luminescence intensity. It can be concluded that Tb3+ doped transparent glass ceramics containing Y2Ti2O7 crystal can be used in green light emission fields.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114688889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly selective epoxidation of styrene over mesoporous carbon support with titanium dioxide under ambient photocatalytic condition","authors":"guangjian wang, Hongyu Gao, Fangfang Kang, Y. Zi","doi":"10.1117/12.2669872","DOIUrl":"https://doi.org/10.1117/12.2669872","url":null,"abstract":"The main purpose of this paper was to design a novel structure mesoporous carbon composite materials and develop economic and green photocatalytic oxidation process for common chemical reaction intermediates of styrene oxide under ambient condition based on the basic principle of environmentally friendly chemistry. Order mesoporous silica was prepared by conventional hydrothermal method using triblock copolymer as template agent, and then order mesoporous carbon materials were synthesized via a simple template method by adding sucrose to the sulfuric-acid-treated mesoporous silica and followed by carbonization and removal template of mesoporous silica on account of inverse replica effects. The composite mesoporous carbon materials assembled in situ anatase TiO2 of different contents were obtained through impregnation and sintering at 700℃ for 2h in nitrogen atmosphere for both removal of unhydrolyzed tetrabutyl titanate and crystallization of titanium dioxide. All the composite catalysts had been unambiguously characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscoscopy, scanning electron microscopy, and high-resolution transmission electron microscopy, etc. Structural and morphological of prepared carbon materials showed that the typical ordered mesoporous structure was maintained after TiO2 insertion and active component of TiO2 was uniformly distributed in mesoporous carbon channels. A variety of reaction parameters such as molar ration of H2O2 to the styrene, reaction time, solvent, the amount of catalyst and so on were optimized at length for epoxidation of styrene with H2O2 as the oxidant over prepared composite catalysts under photo-irradiation. The results indicated that reaction conversion reached over 30% with 90% selectivity under the photocatalytic condition for room temperature, 0.50g of styrene, 2.00g of H2O2(30%wt%), 0.200g of catalyst and 3h reaction time. This process strategy for green photocatalytic oxidation under ambient condition was expected to be applied to other organic synthesis processes as a general environmentally benign chemical means.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"439 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123868034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Infrared small target detection based on saliency and difference of Gaussian","authors":"Dong Li, Jie Yin, Guo-liang Zhou, Jianlin Huo, Jia-ying Li","doi":"10.1117/12.2668397","DOIUrl":"https://doi.org/10.1117/12.2668397","url":null,"abstract":"The challenge of detecting the infrared small target in complex scenes is how to enhance the target area and suppress the interference of the background and noise. We present an infrared small target detection method based on saliency and difference of Gaussian. By calculating the spectral residuals of the original infrared images to obtain the saliency map, and a gray difference map is computed by adopting the difference of Gaussian. By normalizing and fusing these maps, the final feature response map is obtained, which can restrain the background noise and enhance the targets. Finally, the adaptive threshold segmentation method is used to detect small targets from the feature response map. Experimental result indicates that the proposed method achieves better image processing effect than traditional detection algorithm, works well under the interference of background and noise as well as detects the target accurately under different complex backgrounds.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124046866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite element analysis on longitudinal-torsional ultrasonic vibration assisted helical milling of Ti-6Al-4V","authors":"Jian-hui Yan, P. Feng, Jie Xu, Chao Xu, Feng Feng","doi":"10.1117/12.2668416","DOIUrl":"https://doi.org/10.1117/12.2668416","url":null,"abstract":"In recent years, the use of Ti-6Al-4V alloy in the aviation industry has been increasing. However, due to the difficult machining characteristics of Ti-6Al-4V, hole-drilling in titanium is a major problem plaguing the aviation manufacturing industry. Ultrasonic vibration-assisted machining is a special machining method with excellent advantages such as reduced cutting force and cutting temperature in drilling. To evaluate the distinction, this study attempts to establish a 3D finite element milling simulation model. The differences between Conventional Helical Milling (CHM) and Longitudinal-Torsional Ultrasonic Helical Milling (LTUHM) are compared in the simulation results. The results show that the cutting force and von Mises stress concentration can be effectively reduced in LTUHM, and the chip morphology is fragmentized in CHM while the chip is continuous in LTUHM.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121798813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Near-infrared emission enhancement of erbium-doped glass by using silver nanowire","authors":"Xiyuan Yan","doi":"10.1117/12.2668901","DOIUrl":"https://doi.org/10.1117/12.2668901","url":null,"abstract":"Optical amplifiers are a crucial component for optical communication by maintaining the strength of optic signals over long distances. Currently, optic signals are usually amplified by Erbium-Doped Fiber Amplifiers (EDFA). Optical amplification with EDFAs utilize 20-30 meters of Erbium-doped optic fiber, which takes up a large volume. The large volume renders the integration of optical transmitters, optical receivers and optical network units difficult. Therefore, to make optical communication more convenient, research on reducing the size of optical amplifiers is important. This paper proposes the adding of silver nanowires onto Erbium-doped glass to enhance its luminous intensity, then verifies it through experiments. A layer of silver nanowires is plated over pieces of Erbium-doped glass. The excitation emission intensity of both the plated and un-plated Erbium-doped glass were tested. Through analyzing the excitation spectrum, I concluded that the layer of silver nanowires results in an increase in optical gain of the Erbium-doped glass of around 30%.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"310 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122779111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive investigation of AlCl3-based electrolytes for rechargeable aluminum-ion battery","authors":"Chengyuan Liu, Jiang-yu Yu, Zhiwei Liu, Lingqian Kong","doi":"10.1117/12.2669863","DOIUrl":"https://doi.org/10.1117/12.2669863","url":null,"abstract":"Due to the high reversibility of the aluminum deposition/dissolution process, aluminum chloride-based room temperature molten salts exhibit excellent electrochemical performance as the electrolytes of rechargeable aluminum-ion batteries. Aluminum chloride-1-ethyl-3-methylimidazole chloride (AlCl3-EMImCl), AlCl3-acetamide and AlCl3-urea systems are considered as the ideal electrolytes for aluminum-graphite batteries. To better develop and apply those electrolytes, the effects of three electrolytes on the electrochemical performance of aluminum-graphite batteries were studied, comprehensively. AlCl3-EMImCl electrolyte exhibits excellent rate capability and coulombic efficiency. While the AlCl3-amide systems only provide one-third capacity of AlCl3-EMImCl, and the coulombic efficiency is only about 90% at lower rates. The significant difference between the electrochemical properties of AlCl3-based electrolytes is related to the kinetics of ion transport and diffusion between the interface of electrolyte and cathode.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134355007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of rare Earth fluorescent probe intermediates by homogeneous time-resolved fluorescence immunoassay","authors":"Shengnan Zhao, Shuangshuang Zhao, Qingxin Zhao, Yan Guo","doi":"10.1117/12.2668609","DOIUrl":"https://doi.org/10.1117/12.2668609","url":null,"abstract":"In order to prepare a novel cave-like bifunctional chelating agent for homogeneous phase time-resolved fluorescence immunoassay, using 2-benzyl oxo carbonyl 6-tert-butyl oxo carbonyl. The intermediate, 5-amino-(2-aminoethyl)-H(2,2)- aminotert-butyl ester E-14, was synthesized by five steps of reduction, oxidation, amination and hydrogenation of -L-lysine E-7. The synthesis methods and conditions of the first steps were mainly studied, and the molecular structure was analyzed by means of Nuclear Magnetic Resonance (NMR), Fourier Transform Infrared Spectrometer (FTIR), Mass Spectrometry (MS). It provides a valuable intermediate and preparation method for the application of homogeneous time resolved fluorescence immunoassay.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114942911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep learning based optical orbital angular momentum demultiplexing under high scattering","authors":"Yuhang Liu, Xiaoli Yin, Zhaoyuan Zhang","doi":"10.1117/12.2668770","DOIUrl":"https://doi.org/10.1117/12.2668770","url":null,"abstract":"Optical communication systems based on Orbital Angular Momentum (OAM) theoretically have great potential to increase the channel capacity of the system. When light passes through a high scattering medium, its phase and intensity are affected by scattering, which makes it difficult to demultiplex the OAM modes. In order to alleviate the mode crosstalk caused by scattering, this paper proposes a deep learning-based scheme for OAM modes demultiplexing. A simulation model of the optical communication system is built based on the scattering medium transmission matrix theory. The multiplexed OAM beam is transmitted through the system to generate the speckle pattern, matching the incident phase distribution as the data set. Based on this dataset, a U-Net type Deep Neural Networks (DNN) are trained to reconstruct the phase of the light distorted by the scattering medium, thereby the multiplexed OAM modes are identified by a Visual Geometry Group (VGG) type DNN. The simulation results show that at a Signal-to-Noise Ratio (SNR) of (1, 20) dB, the recognition rate of the demultiplexed OAM modes can reach beyond 97%. For grayscale image transmitting via OAM multiplexing under the high scattering, the Pearson correlation between the demultiplexed image and the original image is more than 0.98.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115183330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flow and performance calculation of a new integrated form of heat exchanger","authors":"Y. Wang, Yifei Yang, Chao Liu, Chenxin Guo, Yuping Zeng","doi":"10.1117/12.2668355","DOIUrl":"https://doi.org/10.1117/12.2668355","url":null,"abstract":"With the development of domestic commercial passenger aircraft, the performance requirements and integration level of the aircraft ram air system have gradually increased. In this paper, the modular integrated design of the air-conditioning secondary, primary heat exchanger, auxiliary cooling heat exchanger, air quasi-secondary, and primary heat exchanger in the system is carried out to obtain a new integrated form of heat exchanger. The CFD mathematical model of the corresponding ram air system and the Simulink simulation platform, a single-channel test bench is built to verify the effectiveness of the CFD mathematical model and the Simulink simulation platform, and the flow distribution and performance of the corresponding ram air system under different flight conditions are calculated.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123372138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An active frequency drift islanding detection method for photovoltaic microgrid","authors":"Huaizhong Chen, Meng Meng","doi":"10.1117/12.2669865","DOIUrl":"https://doi.org/10.1117/12.2669865","url":null,"abstract":"Islanding detection is a necessary function of photovoltaic microgrid system. When islanding occurs, it is required to quickly detect the islanding state, cut off the islanding power at the same time, and minimize the loss of microgrid. In view of the low detection efficiency of the traditional active frequency offset method in the islanding detection of inverter, a positive feedback active frequency offset method is proposed in this paper. This method perturbs the frequency from both positive and negative directions, which effectively solves the problem of low detection efficiency. The simulation results further verify the effectiveness of this method: it can not only quickly detect the island state and shorten the detection time, but also further reduce the blind area of island detection and improve the efficiency of island detection.","PeriodicalId":259102,"journal":{"name":"Optical Technology, Semiconductor Materials, and Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122842171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}