International School on Quantum Electronics: Laser Physics and Applications最新文献_第5页

Elastic backscatter lidar in PBL study 弹性后向散射激光雷达在PBL中的研究

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2518096

V. Mitev

引用次数: 0

Ellipsometric study of thin carbon films deposited by pulsed laser deposition 脉冲激光沉积碳薄膜的椭偏研究

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2516970

A. Dikovska, L. Tzonev, I. Avramova, P. Terziiska, I. Bineva, G. Avdeev, E. Valcheva, J. Mladenoff, O. Angelov, S. Kolev, T. Milenov

{"title":"Ellipsometric study of thin carbon films deposited by pulsed laser deposition","authors":"A. Dikovska, L. Tzonev, I. Avramova, P. Terziiska, I. Bineva, G. Avdeev, E. Valcheva, J. Mladenoff, O. Angelov, S. Kolev, T. Milenov","doi":"10.1117/12.2516970","DOIUrl":"https://doi.org/10.1117/12.2516970","url":null,"abstract":"The fabrication of nano-crystalline carbon films was implemented by the application of pulsed laser deposition (PLD) technology. The experiments were performed in a standard on-axis laser ablation (LA) configuration. The third harmonic of a Nd:YAG laser was used for ablation of a microcrystalline graphite target. All experiments were performed in vacuum at a pressure of 1×10-3 Pa for different deposition times. (001) Oriented silicon (Si) covered by either 350 or 450 nm silica (SiO2) layer was used as a substrate. The films have a thickness between 4 and 40 nm and are characterized by X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, atomic force microscopy (AFM) and ellipsometry measurements. We established deposition of nano-sized graphene-like films on top of predominantly amorphous carbon films with a thickness of 1- 2 nm. The measured the (n and k) and determined the values for the forbidden gap of the films which are between 0.01 eV and about 1 eV with reference to the sp3 hybridized carbon content of the film.","PeriodicalId":355156,"journal":{"name":"International School on Quantum Electronics: Laser Physics and Applications","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116912019","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}

引用次数: 1

Synthesis and characterization of surface embedded silver nanoparticles in ZnO matrix ZnO基体表面包埋银纳米粒子的合成与表征

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2516535

M. Koleva, N. Nedyalkov, V. Nuzhdin, V. Valeev, Y. Osin, A. Stepanov

{"title":"Synthesis and characterization of surface embedded silver nanoparticles in ZnO matrix","authors":"M. Koleva, N. Nedyalkov, V. Nuzhdin, V. Valeev, Y. Osin, A. Stepanov","doi":"10.1117/12.2516535","DOIUrl":"https://doi.org/10.1117/12.2516535","url":null,"abstract":"The present work concerns the fabrication and the investigation of Ag nanoparticles, surface embedded in the pulsed laser deposition (PLD) grown ZnO thin films. The third-harmonic Nd:YAG laser is used for PLD of ZnO thin films. The ion implantation technique for Ag doping in ZnO matrix is used. The morphology, texture and composition of the samples are investigated. The Ag distribution in the implanted near-surface region is investigated as a function of the processing conditions. The influence of the substrate temperature and ambient oxygen pressure during the PLD growth of ZnO films is studied. The applied processing parameters during the deposition of ZnO thin films lead to different microstructure of ZnO host matrix and have a significant impact on the properties of subsequently produced Ag/ZnO nanocomposites. The changes of optical surface plasmon resonance (SPR) band of synthesized Ag nanoparticles for different morphologies are analyzed for implanted samples. The composite nanostructures are found to exhibit SPR absorption properties of metal nanoparticles after the ion implantation, especially pronounced for the samples with laser grown ZnO matrix at high substrate temperatures. This study demonstrates how the different crystal structure of the ZnO supporting material, influences the Ag implantation process and, respectively, the properties of the produced Ag/ZnO nanocomposites.","PeriodicalId":355156,"journal":{"name":"International School on Quantum Electronics: Laser Physics and Applications","volume":"34 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132365262","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}

引用次数: 0

Implementation of synergetic observations by terrestrial and space lidar systems and sun-radiometer for study of large scale aerosol changes 利用地面和空间激光雷达系统与太阳辐射计协同观测研究大尺度气溶胶变化

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2516356

A. Bril, A. Fedarenka, V. Peshcharankou, S. Denisov, F. Asipenka, A. Slesar, M. Korol, V. Dick, Boris Chen, Leonid Sverdlik, Analoli Chaikovsky

{"title":"Implementation of synergetic observations by terrestrial and space lidar systems and sun-radiometer for study of large scale aerosol changes","authors":"A. Bril, A. Fedarenka, V. Peshcharankou, S. Denisov, F. Asipenka, A. Slesar, M. Korol, V. Dick, Boris Chen, Leonid Sverdlik, Analoli Chaikovsky","doi":"10.1117/12.2516356","DOIUrl":"https://doi.org/10.1117/12.2516356","url":null,"abstract":"The method of combined lidar and radiometer sounding (LRS) became a specialized tool for measuring altitude distributions of aerosol optical parameters and aerosol mode concentrations. The work gives description of advanced version of LRS technique, which integrates data of ground-based multiwavelength lidar systems, as well as satellite lidars like CALIOP, with data of AERONET radiometer stations for monitoring aerosol mode concentration profiles to study the atmospheric process over the area of large regions, or the Earth's atmosphere as a whole. Lidar and Radiometer Inversion Cod (LIRIC) is used as a base software package for processing data of terrestrial and satellite lidar observation because of high stability of its sequential inversion procedure for processing combined radiometer and lidar data. Special software module was developed to extract the ensemble of individual CALIOP profiles of attenuated backscatters in the vicinity of AERONET sites from CALIPSO Lidar L1B Profile Data. A number of collocated measurements by means of AERONET radiometer, ground-based lidar and CALIOP were carried out to validate the results of the extended LRS technique. Altitude profiles of aerosol mode concentrations retrieved from ground-based and satellite lidar data are compared to estimate differences between two types of LRSmeasurements. Advanced terrestrial and satellite LRS technique was used to obtain the “snapshot” of aerosol concentration profiles over the world in the frame of international “Lidar and Radiometer measurement campaign - 2017\" (LRMC-2017). Thirty nine combined lidar and radiometer stations in Eurasian and South American continents participated in terrestrial part of the campaign.","PeriodicalId":355156,"journal":{"name":"International School on Quantum Electronics: Laser Physics and Applications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131670541","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}

引用次数: 0

Properties of polymeric materials for optical systems 光学系统用高分子材料的性能

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2516748

S. Kasarova, N. Sultanova, Radostin Kasarov, I. Nikolov

引用次数: 0

Tappert transformation in nonlinear wave theory 非线性波动理论中的Tappert变换

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2516022

V. N. Serkin, T. Belyaeva, G. Corro, A. Ramírez, L. Morales-Lara, R. Peña-Moreno

{"title":"Tappert transformation in nonlinear wave theory","authors":"V. N. Serkin, T. Belyaeva, G. Corro, A. Ramírez, L. Morales-Lara, R. Peña-Moreno","doi":"10.1117/12.2516022","DOIUrl":"https://doi.org/10.1117/12.2516022","url":null,"abstract":"We review the Tappert transformation for the nonlinear Schrödinger equation and generalize it for the higher- order nonlinear Schrödinger equation (hoNLSE) model of femtosecond nonlinear optics, in which the para- meterized gravitational-like potential e¤ectively simulates the Raman self-scattering e¤ect (the soliton Raman self-frequency shift). We present the explicit gauge transformation of this model into the \"free\" hoNSLSE with varying in time dispersion and nonlinearity, but without external potentials. With a certain choice of the dispersion and nonlinearity parameters, hoNLSE is turning into the completely integrable physical models, for example, the Hirota equation with gravitational-like potential, for which the same reversible gauge transformation and the change of variables are fulfilled. The transformations between the proposed integrable models allowed one to obtain directly the soliton solutions of the forced nonisospectral equations - accelerating in the gravitational- like potential nonautonomous solitons - without resolving the nonisospectral IST problem with varying in time spectral parameter.","PeriodicalId":355156,"journal":{"name":"International School on Quantum Electronics: Laser Physics and Applications","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121609703","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}

引用次数: 0

Spectral interferometric measurement of a birefringence photonic crystal fiber 双折射光子晶体光纤的光谱干涉测量

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2515429

E. Molina Flores, A. Ramírez, A. Zehe

引用次数: 1

Determination of residual stresses in fiber laser welded stainless steel joints by neutron diffraction method 用中子衍射法测定光纤激光焊接不锈钢接头残余应力

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2516421

D. Kaisheva, G. Bokuchava, I. Papushkin, G. Genchev, N. Doynov, R. Ossenbrink, V. Michailov, P. Petrov

引用次数: 0

Flexible and stretchable optoelectronic devices using graphene 使用石墨烯的柔性和可拉伸光电器件

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2516750

C. C. Chiou, V. Marinova, S. Petrov, Cvetelina Fidanova, Cvetelina Fidanova, Ina Angelova, Ina Angelova, D. Petrova, D. Petrova, Dimitre Dimitrov, S. Lin

引用次数: 3

Elastic-lidar signal statistics and sensing efficiency depending on the laser radiation wavelength 弹性激光雷达信号统计及随激光辐射波长变化的传感效率

International School on Quantum Electronics: Laser Physics and Applications Pub Date : 2019-01-29 DOI: 10.1117/12.2516532

T. Evgenieva, V. Anguelov, L. Gurdev

{"title":"Elastic-lidar signal statistics and sensing efficiency depending on the laser radiation wavelength","authors":"T. Evgenieva, V. Anguelov, L. Gurdev","doi":"10.1117/12.2516532","DOIUrl":"https://doi.org/10.1117/12.2516532","url":null,"abstract":"In the present work, Poisson-fluctuating lidar profiles are modeled statistically as obtained from clear and hazy atmospheres containing Sharan-dust-like layers. The shot-noise fluctuations are simulated in fact induced by the useful signal itself, the optical background, and the dark current in the photon detector. The profiles obtained for UV, VIS and NIR sensing radiations are compared and analyzed. It is shown that the best lidar images of Saharan dust layers are obtainable by using NIR sensing radiation. They are characterized by higher contrast and clarity. The images obtained by using UV or VIS radiation may be entirely masked by shot-noise and even by multiple-scattering due parasitic (bias and random) noise. To clarify the images obtained in this case, by lowering the random noise level, one should average, as shown, the lidar profiles over a series of laser shots and/or smooth them along the lidar line of sight. Certainly, this lowers the temporal and/or spatial resolution of sensing by UV and VIS radiation. Thus, the results obtained confirm and illustrate the advantages of the NIR wavelength range, when sensing dense compact aerosol objects, predicted previously by the mean profiles investigated of the lidar signal strength and signal-to-noise ratio.","PeriodicalId":355156,"journal":{"name":"International School on Quantum Electronics: Laser Physics and Applications","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132251838","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}

引用次数: 0