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Investigation of Thermal Changes in Dental Soft Tissue under 810 nmLow Level Diode Laser Radiation in Osseointegration 810 nmLow - Level二极管激光对牙体软组织热变化的研究
Journal of lasers, optics & photonics Pub Date : 2017-06-30 DOI: 10.4172/2469-410X.1000157
S. Shahi, F. Kouhrangiha
{"title":"Investigation of Thermal Changes in Dental Soft Tissue under 810 nmLow Level Diode Laser Radiation in Osseointegration","authors":"S. Shahi, F. Kouhrangiha","doi":"10.4172/2469-410X.1000157","DOIUrl":"https://doi.org/10.4172/2469-410X.1000157","url":null,"abstract":"Today use of lasers in Implantology has made significant progress, so that requires far less traditional methods of treatment and it has been increased speed of healing. One of the lasers applications in implantology is in the process of osseointegration which made minimum the prolonged time among of planted surgical implants, prosthesis fabrication and implant. Aim of the present survey is to examine and record the temperature changes caused by low level diode laser (Mark GIGA) around 810nm wavelength during laser interaction with tissue. Besides in a clinical study, the surface temperature changes of soft tissue recorded by IR Thermometer once before and after the diode laser radiation at 10 implants placed on 4 patients (3 women and 1 man) in 15 points (total 48 points) from different parts of tissue. Then, the temperature data analyzed by COMSOL Multiphysics 5.2 software. However, the soft tissues temperature changes under diode laser treatment of osseointegration but don’t damage tissues. Also after inserting implants, the laser irradiation cause more stability and reduce the duration of treatment.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"114 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2017-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79909543","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
Monocolor Radiation Source Based on Low-Energy Electron Beam and Dc Fields With High Gradient of Electromagnetic Energy Density 基于低能量电子束和高电磁能量密度梯度直流场的单色辐射源
Journal of lasers, optics & photonics Pub Date : 2017-06-30 DOI: 10.4172/2469-410X.1000161
H. Lin
{"title":"Monocolor Radiation Source Based on Low-Energy Electron Beam and Dc Fields With High Gradient of Electromagnetic Energy Density","authors":"H. Lin","doi":"10.4172/2469-410X.1000161","DOIUrl":"https://doi.org/10.4172/2469-410X.1000161","url":null,"abstract":"Copyright: © 2017 Lin H. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. A new route of monocolor radiation generation, which is based on the interaction of a low-energy electron with targeted designed driving DC fields, is proposed. It does not require the driving fields to be of high electromagnetic energy density. Instead, it relies on a high gradient of the electromagnetic energy density which can be achieved through reasonablly arranging components generating DC fields.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87365066","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: 3
Optical Properties and Potential Applications of Nanoferrites 纳米铁氧体的光学性质及其潜在应用
Journal of lasers, optics & photonics Pub Date : 2017-06-30 DOI: 10.4172/2469-410X.1000158
N. Goswami, S. Surendra, Katyal Sc
{"title":"Optical Properties and Potential Applications of Nanoferrites","authors":"N. Goswami, S. Surendra, Katyal Sc","doi":"10.4172/2469-410X.1000158","DOIUrl":"https://doi.org/10.4172/2469-410X.1000158","url":null,"abstract":"Copyright: © 2017 Goswami N, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The real challenge of researchers of nanotechnology lies in fabrication of nanometre-scale particles and their controlled interaction with each other and with surroundings. Nanoferrites are found to showcase superior and substantially distinct electrical and magnetic properties. Historically, the industrial usage of magnetic and electrical materials was based mainly on iron and its alloys [1]. But the conventional methods of minimising losses due to eddy current could no longer be utilized competently and economically at high frequency operations [1]. This limitation stimulated interest in “magnetic Insulators” which were first testified by Hilpert in 1909 [1]. The researchers combined metal oxides having high value of electrical resistivity with preferred magnetic features to devise magnetic material, suitable for high frequency applications. The generic molecular formula of ferrites is presented as MOFe2O3 whereas, chemical formula is typically given as MFe2O4, where M represents the divalent metal ions like Cu2+, Fe2+, Ni2+, Co2+, Zn2+, Mn2+, Mg2+ etc. [2]. Magnetically recyclable ZnFe2O4/ZnO nanocomposites, immobilized on different contents of graphene, validate favourable photo-catalytic activity under solar light irradiation [3].","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"33 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2017-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87942433","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: 3
Embedded Ring Modulators and Switches 嵌入式环形调制器和开关
Journal of lasers, optics & photonics Pub Date : 2017-06-30 DOI: 10.4172/2469-410X.1000163
U. Das, Sadasivan
{"title":"Embedded Ring Modulators and Switches","authors":"U. Das, Sadasivan","doi":"10.4172/2469-410X.1000163","DOIUrl":"https://doi.org/10.4172/2469-410X.1000163","url":null,"abstract":"Micro embedded ring resonator electro-optic switching in InGaAsP based quantum well structures is briefly reviewed and all optic switching is presented. A 20Gbps electro-optic modulator with >12dB extinction ratio has been proposed using quantum confined stark effect tuning, for which a novel high speed coplanar-microstrip inverted ground plane transition has also been designed. All optical tuning is used to theoretically demonstrate a 20G packets/s switching with a 5dB switching ratio. The fabricated micro embedded ring resonator ring using e-beam lithography and Al lift off mask has been demonstrated and the measured device spectrum is found to match well with the simulated results.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"21 7 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2017-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75753419","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: 2
Role of Terahertz Radiation on Optical Properties of Laser Pulse in aDouble Coupled Quantum Well Nanostructure 太赫兹辐射对双耦合量子阱纳米结构中激光脉冲光学特性的影响
Journal of lasers, optics & photonics Pub Date : 2017-06-20 DOI: 10.4172/2469-410X.1000154
J. Shiri, Abdollah Malakzadeh
{"title":"Role of Terahertz Radiation on Optical Properties of Laser Pulse in aDouble Coupled Quantum Well Nanostructure","authors":"J. Shiri, Abdollah Malakzadeh","doi":"10.4172/2469-410X.1000154","DOIUrl":"https://doi.org/10.4172/2469-410X.1000154","url":null,"abstract":"The transient and steady-state behavior of the absorption and the dispersion of a probe pulse laser field propagating through an InGaAsInP double coupled quantum well are studied. The effect of terahertz radiation excitation, electron tunnelling and incoherent pumping on the optical properties of the probe field is discussed. In the terahertz (30~300 μm or 1~10 THz) intersubband transition, the incoming photon energy is (4~41 mev) and maybe in the order of electron thermal broadening (KT~6 meV-25 meV for 77 K-300 K). Therefore in the conventional structure, the incoming photon can directly excite the ground state electrons to higher energy levels and this process inhabits the correct optical switching in terahertz applications. We show that the group velocity of a light pulse can be controlled from superluminal to subluminal or vice versa by controlling the rates of incoherent pumping field and tunnelling between the quantum wells. The required switching time is calculated and we find it between 3 to 26 picoseconds.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"3 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2017-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83616711","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
Pt-Symmetric Nonlinear Directional Fiber Couplers with Gain and Loss forUltrashort Optical Pulses 用于超短光脉冲具有增益和损耗的pt对称非线性定向光纤耦合器
Journal of lasers, optics & photonics Pub Date : 2017-06-20 DOI: 10.4172/2469-410X.1000155
L. Safaei, Zarndi Mb, M. Hatami
{"title":"Pt-Symmetric Nonlinear Directional Fiber Couplers with Gain and Loss forUltrashort Optical Pulses","authors":"L. Safaei, Zarndi Mb, M. Hatami","doi":"10.4172/2469-410X.1000155","DOIUrl":"https://doi.org/10.4172/2469-410X.1000155","url":null,"abstract":"In this paper, we study the higher-order nonlinear Schrdinger (HNLS) equations for a directional fiber optic coupler with the third-order dispersion (TOD), self-steeping (SS) and stimulated Raman scattering (SRS) effects and gain in one waveguide and loss in the other. We have reduced the system equations to an uncoupled HNLS equation which has bright and dark soliton solutions. It is shown that the Hamiltonian for this equation has a PT-symmetric form. Furthermore the equilibrium points are found and the discussion about their stability is presented.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77296747","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: 6
From Liquid Crystals Localized Modes to Localized Modes in Photonic Crystals 从液晶局域模式到光子晶体的局域模式
Journal of lasers, optics & photonics Pub Date : 2017-05-10 DOI: 10.4172/2469-410X.1000153
V. Belyakov
{"title":"From Liquid Crystals Localized Modes to Localized Modes in Photonic Crystals","authors":"V. Belyakov","doi":"10.4172/2469-410X.1000153","DOIUrl":"https://doi.org/10.4172/2469-410X.1000153","url":null,"abstract":"","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78696119","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: 6
Study and Calculation Electrical Properties of Silver Thin Layers by Four-Point Probe Method 用四点探针法研究和计算银薄层的电性能
Journal of lasers, optics & photonics Pub Date : 2017-03-31 DOI: 10.4172/2469-410X.1000150
Askari Mb, M. Shahryari, S. Nanekarany
{"title":"Study and Calculation Electrical Properties of Silver Thin Layers by Four-Point Probe Method","authors":"Askari Mb, M. Shahryari, S. Nanekarany","doi":"10.4172/2469-410X.1000150","DOIUrl":"https://doi.org/10.4172/2469-410X.1000150","url":null,"abstract":"In this research Ag thin layers on silicon p-type substrate with crystal orientation (100) and 300, 360 and 400 nm thicknesses by thermal evaporation was deposited. Four-point probe and XRD analysis of surface layers consequently for study electrical properties included of sheet resistance, conductivity, resistivity and investigation of Ag phase formed, was done. As result XRD was shown that at 400 nm the best state of silver face-central cubic (FCC) structure with crystal orientation (200) was formed and by Deby-Scherrer formula distance between successive plates was calculated 8.94 nm. Four-point illustrated that sheet resistance and electrical resistivity with increase thickness, decreases while conductance increases. At 400 nm thickness Ag layer has the most conductivity and the lowest resistance.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"43 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2017-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85860064","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: 4
Application of Periodical Nanostructures in Thin Metal Film for NearInfrared Multispectral Filters 周期纳米结构在近红外多光谱滤光片金属薄膜中的应用
Journal of lasers, optics & photonics Pub Date : 2017-03-31 DOI: 10.4172/2469-410X.1000151
Y. Tang
{"title":"Application of Periodical Nanostructures in Thin Metal Film for NearInfrared Multispectral Filters","authors":"Y. Tang","doi":"10.4172/2469-410X.1000151","DOIUrl":"https://doi.org/10.4172/2469-410X.1000151","url":null,"abstract":"Surface plasmonic nanostructures with cross-shaped-hole array in metal thin films are studied for multispectral filters, which cover visible to near-infrared wavelengths. Surface plasmons are induced from incident wave by the periodic arrays of nanostructures of the metal thin film, and then localized surface plasmon polaritons oscillate in the cavity, which is formed by two surfaces of metals through near-field excitation. The transmission spectra of light through these nanostructures are investigated with the finite-difference time-domain method; our simulations show that the features of the hole, and the periods of the array along with other parameters are critical to the optical spectral performance. The optical characterizations of our fabrications of these nanostructures milled by focused ion beam demonstrated very similar results of transmission spectra of simulation results. The simulations demonstrate he optical performance of the metal nanostructures, it is possible to obtain desired multispectral filters by programming parameters of those plasmonic nanostructures.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"131 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2017-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76412363","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
Electronic States and Optical Transitions in an Asymmetric Quantum DotMolecule 不对称量子点分子中的电子态和光跃迁
Journal of lasers, optics & photonics Pub Date : 2017-03-31 DOI: 10.4172/2469-410X.1000152
K. Dvoyan, Tshantshapanyan Aa, M. Hm, B. Vlahovic
{"title":"Electronic States and Optical Transitions in an Asymmetric Quantum DotMolecule","authors":"K. Dvoyan, Tshantshapanyan Aa, M. Hm, B. Vlahovic","doi":"10.4172/2469-410X.1000152","DOIUrl":"https://doi.org/10.4172/2469-410X.1000152","url":null,"abstract":"In the framework of adiabatic approximation the electronic states and direct interband absorption of light in the asymmetric double quantum dot molecule (QDM) having a shape of Cassini lemniscate revolution are discussed. Analytical expressions for the wave functions and energy spectrum of the electron in the QDM are derived. Nonmonotonic split and step-like behavior of the energy spectrum is revealed due to the possibility of the electron tunneling between quantum dots (QDs) in the molecule. The corresponding selection rules of quantum transitions for the direct interband absorption of light are obtained. The absorption edge characteristics depending on the QDM geometrical sizes are also revealed.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"49 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78168405","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
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