{"title":"Controlling of the charge states in laser crystals","authors":"S. Kaczmarek","doi":"10.1117/12.435860","DOIUrl":"https://doi.org/10.1117/12.435860","url":null,"abstract":"In this paper changes in active and lattice ions valence were investigated in some laser materials such as: Cr:Y3Al5O12, Cr:LiNbO3 and Cr:Li2B4O7 glass, Ti:Al2O3 and Ti:LaGaO3, Co:SrLaGa3O7 and Co:Li2B4$?O(subscript 7 glass, Eu, Dy:Li2B4O7 glass, Ho:LiTaO3, Nd:YVO4 , Nd:SrLaGa3O7 and Pr:SrLaGa3O7 after annealing in oxidization and reducing atmospheres, ionizing with gamma, electrons and protons. After (gamma) -irradiation 446 nm emission is observed for Ti:LaGaO3 single crystal due to 2E yields 2T2 transition of Ti3+.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131788479","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":"Temperature, absorption, and excitation study of the A1-xBxC crystals by Raman scattering method","authors":"M. Kozielski, M. Szybowicz","doi":"10.1117/12.435847","DOIUrl":"https://doi.org/10.1117/12.435847","url":null,"abstract":"Recently, wide gap II-VI mixed crystals are studied for their application in technology of blue-green laser diodes. The mixed crystals were growth using the modified pressure Bridgman method. The temperature, absorption and excitation study of Zn1-xAxSe mixed crystals using Raman scattering method is reported. Measurements have been performed for crystal with x equals 0.07 for A equals Mg content and x equals 0.09 for A equals Be content. From the Raman spectra the longitudinal optical (LO) and transverse optical (TO) modes which correspond to ZnSe-, MgSe- and BeSe-like single crystals were distinguished. For all used excitation wavelengths and different temperatures the integrated intensities of LO and TO modes using a curve-fitting method have been calculated.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121269867","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":"Sensitivity of surface acoustic wave devices","authors":"J. Filipiak, K. Zubko","doi":"10.1117/12.435855","DOIUrl":"https://doi.org/10.1117/12.435855","url":null,"abstract":"The SAW devices are widely used as filters, delay lines, resonators and gas sensors. It is possible to use it as mechanical force. The paper describes sensitivity of acceleration sensor based on SAW using the Rayleigh wave propagation. Since characteristic of acceleration SAW sensors are largely determined by piezoelectric materials, it is very important to select substrate with required characteristics. Researches and numerical modeling based on simply sensor model include piezoelectric beam with unilateral free end. An aggregated mass is connected to the one. The dimension and aggregated mass are various. In this case a buckling stress and sensitivity are changed. Sensitivity in main and perpendicular axis are compare for three sensor based on SiO2, LiNbO3, Li2B4O7. Influences of phase velocity, electro-mechanical coupling constant and density on sensitivity are investigated. Some mechanical parameters of the substrates in dynamic work mode are researched using sensor model and Rayleigh model of vibrations without vibration damping. The model is useful because it simply determines dependencies between sensor parameters and substrate parameters. Differences between measured and evaluated quantities are less than 5 percent. Researches based on sensor modes, which fulfilled mechanical specifications similarly to aircraft navigation.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114632211","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}
S. Kaczmarek, M. Grinberg, M. Berkowski, P. Aleshkevych, J. Fink-Finowicki, H. Szymczak
{"title":"Crystal growth and optical properties of Co2+-doped SrLaGa3O7","authors":"S. Kaczmarek, M. Grinberg, M. Berkowski, P. Aleshkevych, J. Fink-Finowicki, H. Szymczak","doi":"10.1117/12.435859","DOIUrl":"https://doi.org/10.1117/12.435859","url":null,"abstract":"Cobalt doped SrLaGa3O7 single crystals have been grown by the Czochralski method in a nitrogen atmosphere and by a floating zone method with optical heating in air. Starting concentrations of Co in the melt were: 0.15, 0.3, 2 and 3 mol percent with respect to Ga by the Czochralski method whereas 2 and 4 mol percent by the floating zone method. We have presented absorption spectra as well as EPR spectra related to octahedrally coordinated Co2+ ion in SrLaGa3O7.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125526367","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}
B. Robertz, F. Boschini, A. Rulmont, M. Ausloos, R. Cloots
{"title":"Single-domain HTC superconducting materials synthesis: BaZrO3 substrates as a tool for optimized systems","authors":"B. Robertz, F. Boschini, A. Rulmont, M. Ausloos, R. Cloots","doi":"10.1117/12.435843","DOIUrl":"https://doi.org/10.1117/12.435843","url":null,"abstract":"Large Dy-123 single-domains have been grown y the top- seeding melt-textured growth technique on yttrium oxide substrates. The main obstacles in fabricating such 'single grain' 123 superconducting samples are discussed, i.e. (I) the dissolution of the seed during the melting and the peritectic cooling stages, (ii) the nucleation of subsidiary 123 grains at the compact/substrate interface. Such secondary nucleation process prevents the single grain from going further. Solutions are suggested as for example by considering the use of a modified coating. BaZrO3 displays a strong inertia in barium cuprate fluxes which suggests to use it as a very promising candidate for buffer layer in between the 123 compact and the furnace 'environment'. In order to provide such 'high quality' sufficiently dense BaZrO3 coatings, soft solution routes have been investigated. Advantages of these are a low calcination temperature and the production of very homogeneous and fine monodisperse powders. The influence of the synthesis conditions on the properties of BaZrO3 and on the sintering process is thus reported.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122060476","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":"Analysis of the transient response of MIS circuits using pseudo-wavelet approach","authors":"K. Plucinski","doi":"10.1117/12.435853","DOIUrl":"https://doi.org/10.1117/12.435853","url":null,"abstract":"This paper deals with the possibilities offered by the wavelet transform used in the analysis of the transient response of MIS circuits. This approach has certain advantages over the classical finite element or finite difference-based algorithms when applied to drift-diffusion model.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121639581","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}
E. Michalski, J. Żmija, Z. Mierczyk, A. Majchrowski, K. Kopczyński, S. Cichowski, J. Wojtanowski
{"title":"Optical properties of doped potassium gadolinium tungstate single crystals","authors":"E. Michalski, J. Żmija, Z. Mierczyk, A. Majchrowski, K. Kopczyński, S. Cichowski, J. Wojtanowski","doi":"10.1117/12.435802","DOIUrl":"https://doi.org/10.1117/12.435802","url":null,"abstract":"Single crystals of double tungstates find applications as laser materials having very good parameters. One of the intensively investigated material sis KGD(WO4)2 doped with rare earth elements. Single crystal of KGd(WO4)2 were grown with the use of Top Seeded Solution Growth technique from K2W2O7 solvent. The crystals have low absorption loses and show high lasing efficiency. Optical investigations of as grown KGW:Nd single crystal confirmed their good optical quality and high absorption coefficient near 810 nm, what in connection with strong luminescence near 1067 nm allows fabrication of diode pumped microchip lasers working both in CW and giant pulse regime. Absorption and luminescence spectra of Nd3+ doped KGW single crystals are presented. Laser action was obtained in form of 128.5 kHz train of 100 ns giant pluses due to YAG:Cr4+ passive Q-switch.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"PP 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126423877","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}
M. Wisniewska, A. Wojtowicz, T. Lukasiewicz, Z. Frukacz, Z. Galazka, M. Malinowski
{"title":"Radio- and VUV-excited luminescence of YAP:Ce, YAP:Pr and YAG:Pr","authors":"M. Wisniewska, A. Wojtowicz, T. Lukasiewicz, Z. Frukacz, Z. Galazka, M. Malinowski","doi":"10.1117/12.435858","DOIUrl":"https://doi.org/10.1117/12.435858","url":null,"abstract":"In this communication we report initial results of studies on x-ray and VUV excited luminescence of YAP and YAG crystals activated with Pr3+ and YAP activated with Ce3+. Excitation and luminescence spectra of Pr3+ and Ce3+ d-f and Pr3+ f-f emissions and luminescence time profiles under pulsed synchrotron excitation are presented and analyzed in order to identify and characterize various host-to-ion energy transfer channels. The results support the notion that direct and trap mediated capture and recombination of holes and electrons via Pr3+ or Ce3+ ions provide the dominant mechanism of radio luminescence production in both YAP and YAG crystals.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"48 23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132216620","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":"High-temperature properties of the fcc metallic crystals in anharmonic approximation","authors":"J. Tomaszewski, C. Malinowska-Adamska, P. Słoma","doi":"10.1117/12.435831","DOIUrl":"https://doi.org/10.1117/12.435831","url":null,"abstract":"The reduced second-order approximation of the self- consistent phonon theory was applied some years ago for cubic metallic crystals those interatomic were approximated by the Morse and Lennard-Jones pair potentials were generally obtained with the help of semi-classical method basin on the classical static relationships between ground- state properties of a crystal and its interatomic potential, and the zero-point vibrations were taken into account only by certain corrections to the experimental data. Moreover, the further self-consistent calculations were being carried out semi-analytically which required some simplifications. In this paper we can reject them because all essential calculations are being carried out numerically. In the studies at high-temperature properties of selected fcc metallic crystal we take as a model of interatomic interactions the Buckingham, Lennard-Jones and Morse pair potentials with the parameters determined self-consistently with the help of the experimental data for the zero-point lattice constant, cohesive energy and isothermal compressibility. Our new theoretical result for pressure variations of the limiting temperatures of dynamical and thermodynamical stability and for the stability criteria are collected and compared with available experimental data.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127553716","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}
V. Dyakonov, A. Prohorov, V. Shapovalov, V. Pashchenko, P. Aleshkevych, S. Piechota, H. Szymczak
{"title":"Studies of manganites by magnetic resonance spectroscopy methods","authors":"V. Dyakonov, A. Prohorov, V. Shapovalov, V. Pashchenko, P. Aleshkevych, S. Piechota, H. Szymczak","doi":"10.1117/12.435841","DOIUrl":"https://doi.org/10.1117/12.435841","url":null,"abstract":"In this work, we present the studies of manganites with superfluous manganese content performed by the magnetic resonance spectroscopy methods. The ferromagnetic resonance (FMR) has been measured on the films. The symmetrical FMR line in paramagnetic phase has the Dysonian-like shape below Tc. The FMR linewidth increases abruptly near the transition temperature. By comparing resonance fields oriented parallel and perpendicular to the film plane, the easy axis of magnetization was determined to be perpendicular to the film plane. In the perpendicular magnetic field, the spin-wave resonance (SWR) spectrum consisting of seventeenth of spin-wave modes has been observed in the (formula available in paper) film. Two of them observed on the high-field side of SWR spectrum are connected to a surface modes. The others are the bulk nonuniform spin-wave modes. Based on a study of temperature and angular dependencies of SWR and FMR spectra, the spin- wave stiffness, g-factor and exchange constant were established. An analysis of the (formula available in paper)has shown that a wide asymmetrical line can be uniquely expanded into four components with different resonance frequencies. There are manganese ions, which ionization states are close to (3+) and (4+) as well as the Mn ions with intermediate valence resulted from the high-frequency electron exchange.","PeriodicalId":365405,"journal":{"name":"International Conference on Solid State Crystals","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121382444","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}