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The holographic sensor is actually a thick hologram plane mirror about the size of a square centimeter. By placing such plate in a special cell containing 24 cells of 2 mm diameter each of which contains 50 ul of fluid being analyzed, we can create chips for the simultaneous determination of several tens of samples.
Optical properties of Zn1−xMnxS and Cd1−xMnxTe films, obtained by close-spaced vacuum sublimation technique are investigated. Measuring of optical characteristics layers was carried out by spectrophotometric analysis. This research allowed to obtained spectral distributions of transmittance, reflectance and absorption coefficients of films and to expect band-gap energy of materials.
Sensor device multifunctional temperature/humidity sensitive thick-film structures based on spinel-type semiconducting and insulating ceramics of different chemical composition Cu0 1Ni 0 1Co0 6Mn1 2O4 (with p+ -type of electrical conductivity), Cu0 1Ni0 8Co0 2Mn1 9O4 (with p-type of electrical conductivity) and magnesium aluminate i-type MgAl2O4 ceramics were fabricated and investigated. These sensor...
Results of the experimental investigations of the powerful pulsed laser radiation interaction with three-dimensional photonic structures (synthetic opal matrixes) are presented. Simultaneously with visible range luminescence X-ray generation was registered. Possible mechanisms responsible for X-ray generation are being discussed.
Transient pulse travelling inside circular microcavity has been studied theoretically using developed rigorous and efficient mathematical method. This method allows us to obtain analytical solution of the wave equation in the Laplace domain. Inverse transformation is obtained through evaluation of residues at singular points that represent excited modes of a resonator. External beam excitation is...
The structure of the optoelectronic dynamic memory. based on a method of regenerative storage and record of the optical information in a recirculating memory element with a fiber-optical delay line is offered, the multiparameter analysis of information characteristics of such system is lead.
A novel definition of optical contrastivity for complicated structures as relative total gap taken over a chosen range of frequencies is introduced. The notion introduced for ordered 1D systems retains its meaning for 2D, 3D and disordered structures. The contrast sensibility to parameters is analyzed for a wide area.
Here we discuss optical properties of the holographic sensors - a new class of analytical optical devices. We discuss the issue of sensors operating mode choice of and the influence of their light-scattering properties. Ways to study the spatial uniformity of the holographic sensors are discussed.
application of tilted holographic photopolymer Bragg gratings in the capacity of reflective gratings is considered theoretically. The negative appearances caused by a volume shrink-age of medium and changes of an average refractive index were taken into account. It is offered two different ways of recording/reading similar reflective gratings over the range 300–1000 nm that matches to the transparence...
Interconduction band gain without global inversion is obtained by engineering conduction band dispersion relations with dilute N resonant centres. We recover the expected dispersive gain shape for similar masses and contrasting results if the effective masses characterizing the relevant subbands are very different.
In this work, we investigate the influence of the substrate material on the temperature distribution in the active region of the nitride-based quantum well UV light-emitting diodes. Results of mathematical modeling show that the application of the GaN substrate leads to a reduction of the averaged temperature in the active region of a few tens of degrees Kelvin comparing with the sapphire substrate.
We have realized computing and analysis current-voltage characteristic. For this purpose we use transfer matrix method combined with Liouville-fon-Neymann equation. Obtained system of ordinary differentional equations describes time dependent changes of transition probabilities and concentrations in single-molecular junction. System was solved using Runge-Kutta method and time dependent polarization...
The measurements of local pulsations of brightness temperature T of melt radiance along the front of the cut of metal sheet by CO2 laser are carried out. Both spectrum regions of hydrodynamic and capillary turbulence of temperature fluctuations are shown with experimental estimation of threshold of thermocapillary effect of absorption as 1 MW/cm2.
This article presents the fabrication of Long Period Gratings in Optical Fiber (LPFGs) applied to the sensing loops. In implementing the manufacturing method used a commercial splicer fiber optic (FiTel S-175), capable of being programmed to a short section of standard optical fiber (SMF28) is taken at intervals between shots in a range from 400µm to of 650µm. The LPFGs Being able to obtain through...
Using the FullWAVE software (www rsoftdesigii.com) that implements the finite-difference FDTD-method of solving Maxwell's equations, we simulate the performance of a three-dimensional nanophotonics device comprising a subwavelength diffraction grating, a wide and a narrow planar waveguide, and a photonic crystal (PhC) Mikaelian lens located in a thin silicon film coated on a substrate containing a...
We investigated the impact of geometrical behaviors on operation parameters in the case of microstructured optical fiber with a ring of air holes. The found results show that at any of considered types defects mode field will have two pronounced maximums. We also have shown that random variations of inclusions diameter can increase total mode field power.
The mathematical model of a dual-wavelength emission from a vertical external cavity surface-emitting laser taking into account the transverse distribution both of optical fields and pump carrier flux density is built. Spatio-temporal dynamics of charge carriers and photons is analyzed. It is shown that the most pronounced optical hole-burning can be observed near the optical axis of the laser.
Frequency tuning of the terahertz laser's cavity technique is presented. The method allows setting of needed frequency shift (relative to a laser active medium central line lasing) value, without using of the frequency measurement equipment. Compound terahertz cavity scheme is proposed, which makes possible instantaneous choosing of several fixed frequencies within laser active material lasing line...
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