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Metal film based pyroelectric detectors and their optical characteristics 金属薄膜热释电探测器及其光学特性
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486671
L. Poperenko, Mykola I. Kluy, V. Staschuk, V. Lysyuk
{"title":"Metal film based pyroelectric detectors and their optical characteristics","authors":"L. Poperenko, Mykola I. Kluy, V. Staschuk, V. Lysyuk","doi":"10.1117/12.486671","DOIUrl":"https://doi.org/10.1117/12.486671","url":null,"abstract":"The pyroelectric detectors on the basis of systems: thin nickel film--thick lithium niobate substrate, thin molybdenum film--thick lithium niobate substrate and thin titanium film--thick lithium niobate substrate implanted by argon ions as sensitive elements were designed. The optical constants of such systems with film thicknesses of d=15, 20, 30, and 40 nm in the wide spectral range were measured. It is shown that the reflectance of the system thin nickel film--lithium niobate increases and the reflectance of the systems thin molybdenum film--thick lithium niobate substrate and thin titanium film--thick lithium niobate substate decreases owing to the implantation. The influence of ion implantation on the surface structure of such systems is studied by electron microscopy. The optical characteristics and the functional parameters of pyroelectric detectors such as spectral sensitivity, radiation stabilty are researched. The number of advantages of such pyroelectric detectors among other detectors of similar type is found.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130175472","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
Specific optical properties of doped ionic lyotropic smectics 掺杂离子溶致晶体的特殊光学性质
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486661
N. Volynets, N. Derevyanko, A. Ishchenko, G. Klimusheva, A. Kovalchuk, T. Mirnaya, G. Yaremchuk, L. P. Yatsenko
{"title":"Specific optical properties of doped ionic lyotropic smectics","authors":"N. Volynets, N. Derevyanko, A. Ishchenko, G. Klimusheva, A. Kovalchuk, T. Mirnaya, G. Yaremchuk, L. P. Yatsenko","doi":"10.1117/12.486661","DOIUrl":"https://doi.org/10.1117/12.486661","url":null,"abstract":"Ionic metal-organic liquid crystals are calling the growing attention of researches in view of variety of their optical, electro-optical and nonlinear optical properties. The typical for this class of mesogenes are metal alkanoates, the structure of which corresponds to smectic A. Salts of alkanoate cacids being mixed with water at room temperature form ionic lyotropic liquid crystals (ILLC), the mesophase structure of which is analogous to that of a thermotropic smectic A. In this work we investigated absorption, luminescence spectra, electrooptical and nonlinear optical properties of ILLC doped with different ionic polymethine dyes. Obtained spectral and optical characteristics of doped ILLC allowed the holography grating recroding. ELectrical investigation has shown that in ILLC and double electrical layer took place near the electrodes. The charge transfer in this area can be described by the Schottky emission through a thin dielectric layer. The comparison with usual liquid crystals shows that the conductivity thin ILLC is more than by three orders higher. Specific spectral, electrical and optical properites of pure and doped ILLC were explained due to the peculiarties of interionic interaction.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132495245","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
Optical spectroscopy of small particles near a surface 光谱学:表面附近小颗粒的光谱学
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486676
M. M. Dvoynenko, A. Goncharenko, V. Lozovski, E. Venger
{"title":"Optical spectroscopy of small particles near a surface","authors":"M. M. Dvoynenko, A. Goncharenko, V. Lozovski, E. Venger","doi":"10.1117/12.486676","DOIUrl":"https://doi.org/10.1117/12.486676","url":null,"abstract":"Solving the self-consistent volume integral equation, we compute the local susceptibilty, as well as volume-averaged one of a small parallelepipedal particle interacing with a flat substrate. To estimate the measure of nonpointness of a particle, the susceptibility in the particle center is compared with that calculated in the dipole point-like approximation. It is shown that a parameter specifying nonpointness is determined by the difference in the particle and ambient dielectric constant, as well as by measure of deviation of the particle shape from cubic one. Numerical calculations of absorption cross-section carried out for small dielectric particles shw that the substrate effects lead to the low-frequency shift of the spectra and appearance of a low-frequency subsidiary peak.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133873894","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
Experimental and theoretical investigation of cold sterilization of medical instruments by plasma DC glow discharge 等离子体直流辉光放电对医疗器械冷灭菌的实验与理论研究
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486639
I. A. Soloshenko, V. A. Khomich, V. V. Tsiolko, I. Mikhno, A. Shchedrin, A. V. Ryabtsev, V. Bazhenov
{"title":"Experimental and theoretical investigation of cold sterilization of medical instruments by plasma DC glow discharge","authors":"I. A. Soloshenko, V. A. Khomich, V. V. Tsiolko, I. Mikhno, A. Shchedrin, A. V. Ryabtsev, V. Bazhenov","doi":"10.1117/12.486639","DOIUrl":"https://doi.org/10.1117/12.486639","url":null,"abstract":"This report presents both the results of experimental investigation of the features of sterilization by plasma DC glow discharge: a) dependencies of the efficiency of plasma sterilization on discharge parameters; b) ratio between main sterilization factors, and the results of numerical simulation of component composition.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127520354","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: 13
Methods of effective molecular size evaluation and temperature shifts of S1 S0 anthracene spectrum s1s0蒽光谱的有效分子大小评价和温度变化方法
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486667
I. A. Ar'ev, N. Lebovka
{"title":"Methods of effective molecular size evaluation and temperature shifts of S1 S0 anthracene spectrum","authors":"I. A. Ar'ev, N. Lebovka","doi":"10.1117/12.486667","DOIUrl":"https://doi.org/10.1117/12.486667","url":null,"abstract":"Three methods of effective molecular size evaluation originated from scaled particle theory (SPT) and a method proposed by Dejardin et al are checked by correlation analysis on internal consistency. It was shown that the Dejardin's method looks more attractive than SPT methods for estimation of the molecular radii r. Temperature dependence of r is analyzed from the viewpoint of SPT and compared with data of spectral shift experiments. Temperature shifts of S1 S2 spectrum of anthracene dissolved in different solvents are as example of such analysis. In accordance with SPT prediction the estimated values of r decrease with temperature increase only in approximation of neglecting of its out-of-plane core vibrations of anthracene.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130066689","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
Temperature dependence of isotropic Raman intramolecular vibrational band contour formation of some liquids. The computer research of methyl iodide 某些液体分子内各向同性拉曼振动带轮廓形成的温度依赖性。碘化甲酯的计算机研究
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486668
V. Danchuk, A. Kravchuk
{"title":"Temperature dependence of isotropic Raman intramolecular vibrational band contour formation of some liquids. The computer research of methyl iodide","authors":"V. Danchuk, A. Kravchuk","doi":"10.1117/12.486668","DOIUrl":"https://doi.org/10.1117/12.486668","url":null,"abstract":"The theoretical analysis of resonant dynamic intermolecular interaction influence on formation of isotropic intramolecular vibrational bands contours in liquids at various temperatures, stipulated by existence of molecules local ordering, has been conducted within the framework of cluster-continuum modle. The new mechanism of isotropic spectral bands narrowing with temperature, observed for some liquids, is offered. This mechanism is stipulated by growing similarity for frequencies of resonant splitting intramolecular vibrational components as structural elements of appropriate spectral bands owing to temperature disording of local molecular surroundings in liquids. On example of liquid methyl iodide the computer analysis of proposed mechanism influence on formation of liquids vibrational spectral function at various temperatures is conducted. The satisfactory consent between results of computer analysis and appropriate experimental data is obtained.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124306150","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
Light scattering by anisotropic spherical particles: Rayleigh-Gans approximation versus T-matrix theory 各向异性球形粒子的光散射:瑞利-甘斯近似与t矩阵理论
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486658
A. Kiselev, A. Panyukov, V. Reshetnyak, T. Sluckin
{"title":"Light scattering by anisotropic spherical particles: Rayleigh-Gans approximation versus T-matrix theory","authors":"A. Kiselev, A. Panyukov, V. Reshetnyak, T. Sluckin","doi":"10.1117/12.486658","DOIUrl":"https://doi.org/10.1117/12.486658","url":null,"abstract":"We calculated the scattering of light by composite anisotropic particles embedded in an isotropic matrix by using the T-matrix ansatz. The model scatterer is assumed to consist of a small central isotropic particle coated by a much larger region in which the optical tensor is radially anisotropic. We determine the region of validity of Rayleigh-Gans approximation (RGA) by comparing approximate values of the scattering cross-section and the dispersion index with the results computed from the exact solution. Both of the scatterers with isotropic and radially anisotropic annular layers have been studied. Our results show that RGA for anisotopic scatterers gives less accurate estimates than when the scatterer is isotropic. In the small particle limit, we have calculated the value of dielectric contrast of effective isotropic sactterer as a function of anisotropy parameter and the layer thickness. We have found that averaging the dielectric tensor over angles gives correct results only if the anisotropy parameter is small.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124222226","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
Intermolecular interactions in binary mixtures of two liquid crystals and mixtures liquid crystal--nonmesogenous compound 双液晶二元混合物及液晶-非介相化合物混合物的分子间相互作用
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486653
O. Sidletskiy, L. Lisetski, V. Malikov, P. Stadnik, N. Moshel
{"title":"Intermolecular interactions in binary mixtures of two liquid crystals and mixtures liquid crystal--nonmesogenous compound","authors":"O. Sidletskiy, L. Lisetski, V. Malikov, P. Stadnik, N. Moshel","doi":"10.1117/12.486653","DOIUrl":"https://doi.org/10.1117/12.486653","url":null,"abstract":"Concentration dependences of dielectric permittivity are studied in binary mixtures of liquid crystal with large value but different sign of dielectric anisotropy and in mixtures of highly polar 8OCB with non-mesogenous and non-polar stearic acid. Positive derivatives of the real part of ε from the additive values in a wide concentration range in observed both in different liquid crystalline and isotiprc phases. Results obtained are considered in comparison to previous works and described in terms of molecular packing and dipole interactions effects. Possible applications of such systems and their unconventional dielectric properties is discussed.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132681068","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
Effect of fluctuations on optical properties of diluted magnetic semiconductors with quantum wells in exciton region of spectra 波动对光谱激子区量子阱稀释磁性半导体光学性质的影响
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486681
V. Sugakov, G. Vertsimakha
{"title":"Effect of fluctuations on optical properties of diluted magnetic semiconductors with quantum wells in exciton region of spectra","authors":"V. Sugakov, G. Vertsimakha","doi":"10.1117/12.486681","DOIUrl":"https://doi.org/10.1117/12.486681","url":null,"abstract":"Effects of compositional fluctuations and interface roughness on the exciton scattering in diluted magnetic semiconductor crystals with quantum wells in an external magnetic field were studied. Broadening of the light reflection, transmission and absorption spectra due to the magnetic impurity concentration and spin projection fluctuations was calculated. The fluctuations of both single and pair impurity center distributions, disc from inclusions as well as destruction of antiferromagnetically coupled pairs by a high magnetic field were taken into account. Calculations were performed for quantum wells (Cd,Mn)Te/CdTe/(Cd,Mn)Te. It was shown, that presence of the fluctuations under study allows to explain the bandwidth value in accordance with experiments. Interesting effect of the external magnetic field induced narrowing of the exciton bandwidth was predicted. Step-like magnetic field dependence of the bandwidth due to antiferromagnetically bounded pair destruction was obtained. These peculiarities in the magnetic field dependence of the exciton bandwidth were explained by the coherent summation of spin-dependent and spin-independent parts of the interaction between the exciton and the defects.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133613673","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
Features of semiconducting properties of ceramic samples ZnSe with admixtures lithium and copper 掺有锂和铜的ZnSe陶瓷样品的半导体特性
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486679
V. V. Bulatetsky, G. E. Davydyuk, V. Manzhara, O. I. Proscura
{"title":"Features of semiconducting properties of ceramic samples ZnSe with admixtures lithium and copper","authors":"V. V. Bulatetsky, G. E. Davydyuk, V. Manzhara, O. I. Proscura","doi":"10.1117/12.486679","DOIUrl":"https://doi.org/10.1117/12.486679","url":null,"abstract":"We have researched intentionally unalloyed and alloyed by lithium and copper ceramic samples ZnSe with various contents of admixtures. It is discovered that with the increase of admixture contents the electric conductivity of samples is increasing non-proportionally to the increase of concentration. Dependence of the value of conductivity of admixture concentration has the area of the sharp increase of electrical condcutivity of samples on the condition of concentration increase for one order of the value. The discovered particularity of conductivity is explained on the base of the theory of proceeding streaming the lumpy systems. The spectrum of photoluminescence of ZnSe ceramics depends on the nature and concentrations of alloyed admixtures.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131967843","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
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