Journal of lasers, optics & photonics最新文献_第10页

Several Steps toward Fundamentals of Physics of Light-Matter Coupling 迈向光-物质耦合物理学基础的几个步骤

Journal of lasers, optics & photonics Pub Date : 2015-08-22 DOI: 10.4172/2469-410X.1000E106

Rumyantsev

{"title":"Several Steps toward Fundamentals of Physics of Light-Matter Coupling","authors":"Rumyantsev","doi":"10.4172/2469-410X.1000E106","DOIUrl":"https://doi.org/10.4172/2469-410X.1000E106","url":null,"abstract":"The microscopic theory of optical phenomena in crystals is closely related to the theory of excitons, which provides an appropriate tool for elucidation of specifics of interaction between electromagnetic fields and crystals and for construction of the physical picture of energy transfer in crystalline media. It is well established that in a crystal, where the translation symmetry allows for excitation of any of its elementary cells (or any of the comprising structural units), the energy transfer of electronic excitations occurs due to the motion of quasi-particles called excitons. The concept of “exciton” was originally introduced into physics by the pioneering works of Frenkel [1]. Among the first to consider excitonic states was also Peierls [2]. These works gave a theoretical explanation for the experimentally observed photoelectrically negative light absorption. Utilizing HeitlerLondon-Heisenberg method in his study of electronic states Frenkel [1] demonstrated that the absence of photoconductivity under the light absorption by an electronic subsystem in an ideal crystal stems from excitations of crystalline structural units moving in waves (due to translation invariance) along a crystal. Such excited states were given the name of “Frenkel excitons”.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76943018","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

Influence of Biofield Treatment on Physical and Structural Characteristics of Barium Oxide and Zinc Sulfide 生物场处理对氧化钡和硫化锌物理结构特性的影响

Journal of lasers, optics & photonics Pub Date : 2015-08-12 DOI: 10.4172/2469-410X.1000122

M. Trivedi, R. M. Tallapragada, A. Branton, Dahryn Trivedi, Omprakash Latiyal, S. Jana

{"title":"Influence of Biofield Treatment on Physical and Structural Characteristics of Barium Oxide and Zinc Sulfide","authors":"M. Trivedi, R. M. Tallapragada, A. Branton, Dahryn Trivedi, Omprakash Latiyal, S. Jana","doi":"10.4172/2469-410X.1000122","DOIUrl":"https://doi.org/10.4172/2469-410X.1000122","url":null,"abstract":"Barium oxide (BaO) and zinc sulfide (ZnS) are well known for their applications in electrical, optical and chemical industries. The present study was aimed to evaluate the impact of biofield treatment on the structural and physical properties of BaO and ZnS powder. The study was carried out in two groups, one was set to control, and another group was subjected to Mr. Trivedi’s biofield treatment. Control and treated samples of BaO and ZnS were analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and surface area analyzer. XRD data showed that lattice parameter and unit cell volume of BaO powder were reduced upto 0.42% and 1.26%, respectively as compared to control. Whereas, density of treated BaO was increased upto 1.27% as compared to control. Besides, the unit cell volume was changed in treated ZnS from -0.55 to 0.24% as compared to control that led to change in density from -0.24 to 0.55% after biofield treatment. However, the crystallite size was substantially increased upto 40.5% and 71.4% in treated BaO and ZnS, respectively as compared to control. FT-IR data exhibited that absorption peaks at wavenumber 862/cm (control) was shifted to 858/cm in treated BaO. Upward shifting of absorption peaks corresponding to Zn-S stretching bond was observed in treated (617/cm) as compared to control (592/cm). Furthermore, surface area result showed that it was reduced by 4.32% and 2.1% in treated BaO and ZnS powder, respectively as compared to control. Hence, these, findings suggest that biofield treatment has altered the structural and physical properties of BaO and ZnS powders.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"35 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2015-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82057989","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: 14

Theory of Augmented Quantum Reality 增强量子现实理论

Journal of lasers, optics & photonics Pub Date : 2015-08-01 DOI: 10.4172/2469-410X.1000133

S. Budnik

引用次数: 0

Measurement of nonlinearity and spectral study of a laser dye 激光染料非线性测量及光谱研究

Journal of lasers, optics & photonics Pub Date : 2015-07-29 DOI: 10.4172/2469-410X.1000121

Sindhu Sukumaran, A. Ramalingam, Srinivasan Ag

{"title":"Measurement of nonlinearity and spectral study of a laser dye","authors":"Sindhu Sukumaran, A. Ramalingam, Srinivasan Ag","doi":"10.4172/2469-410X.1000121","DOIUrl":"https://doi.org/10.4172/2469-410X.1000121","url":null,"abstract":"Problem statement: The third order nonlinear optical properties of organic Polymers are used in high speed telecommunications, optical limiters and optical; computes. The purpose of study was to determine the spectral and third order nonlinear characteristics of the organic dye, Victoria blue in liquid and in solid medium. \u0000Approach: The samples were prepared by dissolving the dye in n-butyl acetate (liquid medium) and a thin film of thickness 1mm was prepared by bulk polymerization method. The spectral characteristics of victoria blue dye doped poly (methyl methacrylate) modified with additive n-butyl acetate (nBA) are studied by recording its absorption and fluorescence spectra and the results are compared with the corresponding liquid mixture. The nonlinear refractive index of the dye in nBA and dye doped polymer film were measured using z-scan technique [1], by exciting with He- Ne laser. The results obtained are intercompared. \u0000Results: Both the samples of dye Victoria blue in liquid and solid medium show a negative nonlinear refractive index. A negative nonlinear dye doped films can be used as optical limiters. The origin of optical nonlinearity in the dye may be attributed due to laser-heating induced nonlinear effect. \u0000PACS Code: 42.55.Mv, 42.65.-k, 82.35.Ej, 42.70.Jk","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"1 1","pages":"32-38"},"PeriodicalIF":0.0,"publicationDate":"2015-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84366494","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

Lasers are used in Nanostructuring, Microarray Analysis and Surgery 激光用于纳米结构、微阵列分析和外科手术

Journal of lasers, optics & photonics Pub Date : 2015-07-12 DOI: 10.4172/2469-410X.1000E105

S. Kr

{"title":"Lasers are used in Nanostructuring, Microarray Analysis and Surgery","authors":"S. Kr","doi":"10.4172/2469-410X.1000E105","DOIUrl":"https://doi.org/10.4172/2469-410X.1000E105","url":null,"abstract":"Lasers are used in nanostructuring operations that are depositional, epitaxial and lithographical in nature, in surgery, confocal scanners in microarray analysis and next-generation sequencing, and number of research applications. Atoms can be trapped using lasers and affect lower temperatures. Laser cooling may lead to agglomeration of atoms. Chu and Philips obtained the Nobel Prize in 1997. Nanoprisms can be generated using laser ablation techniques. The market for nanotechnology products is expected to exceed 1 trillion later this year. The break-down by industry type are about $340 billion from nanomaterials, $300 billion from electronics, $180 billion from pharmaceuticals, $100 billion each form chemicals and sustainability and $70 billion from transportation. Genominomics cost has decreased dramatically over the past 10 years. This may lead to a wider use of genome sequencers. Confocal scanners are used during microarray analysis. Cost of lasers may also be driven down by increased demand. Materials that went into the first semiconductor lasers can be used to make miniature lasers that are lower in cost, smaller in size. Alferov and Kromer were given the Nobel Prize in 2000 for their development of semiconductor physics. Both light source and energy supply are placed in mirrors in one mm sized crystals.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"16 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2015-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74889423","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

XRD, TEM, EPR, IR and Nonlinear Optical Studies of Yellow Ochre 黄赭石的XRD、TEM、EPR、IR及非线性光学研究

Journal of lasers, optics & photonics Pub Date : 2015-07-01 DOI: 10.4172/2469-410X.1000120

S. LakshmiReddy, U. Reddy, T. RavindraReddy, A. Thomas, R. RamaSubbaReddy, R. Frost, T. Endo

{"title":"XRD, TEM, EPR, IR and Nonlinear Optical Studies of Yellow Ochre","authors":"S. LakshmiReddy, U. Reddy, T. RavindraReddy, A. Thomas, R. RamaSubbaReddy, R. Frost, T. Endo","doi":"10.4172/2469-410X.1000120","DOIUrl":"https://doi.org/10.4172/2469-410X.1000120","url":null,"abstract":"Yellow ochre mineral obtained from Vempalli mandal, Cuddapah district, Andhra Pradesh of India is investigated in the present work. Its chemical analysis indicate that Fe2O3=4.22 wt% and TiO2=0.64 wt%. Structural characterization is performed using X-ray diffraction (XRD). XRD results suggest that goethite (Fe2O3) and quartz are present. Among them goethite is the major constituent. Its unit cell is orthorhombic with a=4.14, b=10.0, c=3.03A. The ligands around the metal ion present in the structure are investigated using FTIR spectroscopy. Internal structure studied using TEM suggests that the mineral consists of needle shaped iron oxide nano particles and quartz formed as tetrahedral and octahedral layers. EPR results indicate that the unit cell of the crystal contains Fe(III), and its g values are found to be 4.19 and 2.13. FTIR properties are due to the presence of silicate and hydroxyl anions as ligands. Nonlinear optical measurements carried out using Z-scan reveal the presence of strong nonlinear optical limiting in the material, indicating potential applications in laser safety devices.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"104 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88965114","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: 7

Topical Gel Application and Low Level Laser Therapy on Related Soft Tissue Traumatic Aphthous Ulcers: A Randomized Clinical Trial 局部凝胶应用和低水平激光治疗相关软组织创伤性阿弗特溃疡:一项随机临床试验

Journal of lasers, optics & photonics Pub Date : 2015-06-27 DOI: 10.4172/2469-410X.1000119

A. Domínguez, S. Velásquez

{"title":"Topical Gel Application and Low Level Laser Therapy on Related Soft Tissue Traumatic Aphthous Ulcers: A Randomized Clinical Trial","authors":"A. Domínguez, S. Velásquez","doi":"10.4172/2469-410X.1000119","DOIUrl":"https://doi.org/10.4172/2469-410X.1000119","url":null,"abstract":"Objective: To evaluate the effect of low level laser and Fitostimuline gel® application on pain and healing of orthodontic related traumatic aphthous. Materials and methods: In this double blind and randomized clinical trial, 60 subjects reported traumatic aphthous lesions and the same day they appear immediately they were placed in :G1: (control group) at 13 patients in which only the traumatic factor of the lesion was removed.G2: (Fitostimuline®) 14 patients treated with Fitostimuline® 3 times a day, until the lesion disappeared.G3: (Laser) 14 patients treated with LLLT (Low Level Laser Therapy). G4: (Laser + Fitostimuline®) 15 patients treated with LLLT application and Fitostimuline® 3 times per day, until the lesion healed completely. ANOVA was applied for parametric data, and non-parametric ANOVA (Kruskal-Wallis test - Friedman) and Mann-Whitney U test were made. Past statistical software version 2010 for Excel was used. Results: Higher diameter aphthous ulcer measures and pain significantly reduced for the Fitostimuline Gel®and Laser treated groups or both combined if compared with the control group. The medicament effect its slow if compared to laser therapy, nonetheless when used simultaneously the effect does not differ from the one obtained by laser only application. Fitostimuline Gel® application does not increase laser effect on healing. Conclusions: Topical Fitostimuline Gel® and LLLT therapy are highly efficient treatment options for aphthous ulcer and pain generated by orthodontic treatment, when compared to a control group. LLLT therapy, it’s more effective than Fitostimuline Gel® for orthodontic related aphthous ulcer treatment. Combining therapies do not improve nor enhance treatment results.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"55 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2015-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83772016","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: 7

Sol-gel Preparation and Optical Properties of TiO2/Organically Modified Silane Hybrid Material Containing DR13 含DR13的TiO2/有机改性硅烷杂化材料的溶胶-凝胶制备及其光学性能

Journal of lasers, optics & photonics Pub Date : 2015-05-04 DOI: 10.4172/2469-410X.1000116

T. Gao, W. Que, Xiaofang Wang

{"title":"Sol-gel Preparation and Optical Properties of TiO2/Organically Modified Silane Hybrid Material Containing DR13","authors":"T. Gao, W. Que, Xiaofang Wang","doi":"10.4172/2469-410X.1000116","DOIUrl":"https://doi.org/10.4172/2469-410X.1000116","url":null,"abstract":"Disperse red 13 (DR13) azoaromatic chromophores were incorporated into sol-gel derived TiO2/organically modified silane matrix to achieve a hybrid material doped with dye molecules. Nonlinear optical properties of the asprepared hybrid material were investigated by an optical Kerr shutter technique with an 800-nm femtosecond laser. It is obtained that the response time of the bulk sample doped with 0.1% DR13 molecules is less than 208 fs and the third-order nonlinear refractive index is estimated at about 1.141×10-15 cm2/W. It is also found that the sample of material with higher DR13 content could be with higher third-order nonlinear susceptibility. The linear refractive index and the thickness of the hybrid films derived by a spin-coating process were also studied by a prism coupling technique. It is found that with an increasing of the baking temperature, both the refractive index and the thickness of the hybrid films decrease. Absorption spectra, microstructural and morphological properties of the hybrid films were also characterized by UV–Vis absorption spectroscopy, thermal gravimetric analysis, Fourier-transform infrared spectroscopy and atomic force microscopy. Results indicate that the as-prepared hybrid material is expected to be potential in ultrafast photonic applications.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"1 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2015-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90895427","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

Optimization of Microstructure Optical Fiber using PWE Method for Investigation of Glucose in Intralipid PWE法研究脂肪内葡萄糖的微结构光纤优化

Journal of lasers, optics & photonics Pub Date : 2015-04-30 DOI: 10.4172/2469-410X.1000117

G. Palai, Dalai Pk, Anil Kumar, A. Satpathy, A. Jha, A. Panda, Kushwaha Jk

引用次数: 10

Nonlinear Rectangular Photonic Crystal Fiber (PCF) for Optical Communication Exclusively Super Continuum Generation 用于光通信的非线性矩形光子晶体光纤(PCF)

Journal of lasers, optics & photonics Pub Date : 2015-01-30 DOI: 10.4172/2469-410X.1000114

S. K. Tripathy, Achary Jsn, N. Muduli, G. Palai

引用次数: 8