Temat: 42.25.-p - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: The Sensitivity of Composite Bimodal Waveguide SU-8
Autorzy:: Gut, K.
Tematy:: 42.25.Hz
42.25.-p
42.82.-m; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399413.pdf Link otwiera się w nowym oknie
Opis:: This paper presents the results of measurements of the refractive index and thickness of the waveguide layer SU-8. The mode sensitivity has been calculated as a function of the thickness in a bimodal structure. The differential interference was analyzed concerning modes of the same types $TE_0-TE_1$ and $TM_0-TM_1$ and modes of the same order ($TE_0-TM_0$, $TE_1-TM_1$). The thickness of the layer was determined when the interferometer is most sensitive to changes of the refractive index. It has been proved that the sensitivity of the structure can be increased by adding a nanometric layer with a high refraction index ($n_{A}$=1.975) on the waveguide layer.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 2.

Tytuł:: Spectroscopic Properties of $Pr^{3+}$ Ion in Various Tellurite Glasses
Autorzy:: Burtan, B.
Cisowski, J.
Wasylak, J.
Lisiecki, R.
Ryba-Rymanowski, W.
Jarząbek, J.
Reben, M.
Tematy:: 42.00.00
42.25.-p
42.70.-a; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1377593.pdf Link otwiera się w nowym oknie
Opis:: The goal of this work was to investigate the spectroscopic properties of $Pr^{3+}$ ions (of a comparable concentration of the order of 0.2 mol/dm³) embedded in the tellurite glass matrix, i.e. $TeO_2-WO_3-PbO$ modified with lanthanum and lutetium oxides. The difference is that the last components of both glasses provide ions which are optically inactive within the 4f shell, since this shell is completely empty for $La^{3+}$ ion and completely filled for $Lu^{3+}$ ion. The absorption and fluorescence spectra of $Pr^{3+}$ doped in tellurite glass has been recorded and analyzed in terms of the Judd-Ofelt theory. The studies of the glasses comprised ellipsometric, spectrophotometric and photoluminescence measurements. The ellipsometric studies yield the refraction index dispersion which appears to be quite similar for all the studied glasses. From the spectrophotometric measurements, the absorption spectra have been obtained which, for $Pr^{3+}$-doped samples, have been analyzed in terms of the Judd-Ofelt theory. Finally, the photoluminescence studies demonstrate a clear visible emission from $\text{}^3P_0 $ level to lower-lying states of $Pr^{3+}$ ion.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 3.

Tytuł:: Researches on the Spectral Transmittance of Zinc Oxide ZnO Semiconductor Layers
Autorzy:: Struk, P.
Pustelny, T.
Opilski, Z.
Tematy:: 42.25.Hz
42.25.-p
42.82.Et
68.35.Ct; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1506851.pdf Link otwiera się w nowym oknie
Opis:: The paper deals with investigations concerning a wide-band gap material, viz. zinc oxide ZnO. Special attention has been devoted to the determination of the spectral transmission of zinc oxide layers deposited on quartz substrates. These investigations have made it possible to determine the optical spectral range in which this material is transparent as well as the edges of absorption. The presented investigations are valuable particularly concerning the application of zinc oxide in optoelectronic and photonic structures as well as in systems of waveguides and sensor layers of integrated optics.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 4.

Tytuł:: Aperiodically Poled Nonlinear Crystals as Sources of Multi-Frequency Laser Radiation
Autorzy:: Novikov, A. A.
Laptev, G. D.
Tematy:: 42.25.-p
42.15.Eq
42.65.-k
42.79.Nv; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2047885.pdf Link otwiera się w nowym oknie
Opis:: The new multi-frequency process, which consists of three coupled nonlinear optical interactions: two parametric down-conversions and one up-conversion, in aperiodically poled nonlinear crystal is investigated. The spatial dynamics of wave intensities is studied in detail. The possibility of secondary simplification of coupled equations for correct describing the dynamics of wave interactions is demonstrated. The optimal conditions for parametrical instability of the initial stage of wave interactions are found.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 5.

Tytuł:: A Novel Photon Model - Featuring an Internal Dynamics along with an Amplitude of the Oscillating Particle of Light
Autorzy:: Yarman, T.
Yesilyurt, C.
Arık, M.
Tematy:: 03.65.-w
42.25.-p; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1195103.pdf Link otwiera się w nowym oknie
Opis:: We construct a novel model for a single photon, bearing an internal dynamics. In our model, the photon, while travelling with a speed very close to c (the ultimate speed of light in empty space), is considered to oscillate, in its own frame, with its given frequency f. The envelope of the photon's instantaneous maximum amplitude, which we will call from here on straight "amplitude", is assumed to travel with exactly c, which makes that the center of the photon ought to travel with a speed little less than c. It is interesting to add that, in the present approach, the higher the frequency of the photon at hand, the narrower is its amplitude of oscillation. It is further assumed that the photon has a rest mass which we call "kernel", carrying the translational motion of it. This allows us to estimate the rest mass of the given photon, based on adopted initial conditions of the early universe, based on the recent Yarman and Kholmetskii model (resolving, amongst other things, the dark energy quest). One then comes out with the result that all observable photons (i.e. either high energy gamma rays or very low frequency radio waves), travel practically with the same speed, which is virtually c, the measured ultimate speed. A model regarding the internal dynamics in question is further offered.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Comparison of the Sensitivity of a Polymer Waveguide in the Classical and Reverse Symmetry System
Autorzy:: Gut, K.
Drewniak, S.
Tematy:: 42.25.Hz
42.25.-p
42.70.-a
42.82.-m
42.82.Et
68.35.Ct; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1506777.pdf Link otwiera się w nowym oknie
Opis:: In this paper an analysis of two types of planar waveguides (with the conventional type of the layer and the reverse symmetry waveguide) is presented. In both types of the structure the polymer SU8 was used. In respect of its properties, this polymer is suitable as a waveguide layer. The analysis presented in this paper describes those structures working as sensors. We made a comparison of both types of configuration. We made a detailed analysis of the sensitivity of the covering layer when the thickness of the waveguide layer is changing and when the length of the wave activating the structure is changing, too.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 7.

Tytuł:: Measurements of the Attenuation by Means οf the Scattered Light of Planar Waveguide Structure, Basing on the Polymer SU8 on a Substrate οf Sodium-Calcium Glass
Autorzy:: Gut, K.
Nabaglo, D.
Tematy:: 42.25.Hz
42.25.-p
42.70.-a
42.82.-m
42.82.Et
68.35.Ct; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1795795.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the results of investigations concerning the measurement of the attenuation of planar waveguide structures obtained by means of the photopolymerization of the polymer SU8. The applied substrate was sodium-calcium glass. Attenuation is one of the fundamental parameters of optical waveguide, the knowledge of which is of crucial importance in the construction of various kinds of optical sensors. A method of its measurement has been presented, consisting in the recording of the intensity of scattered light making use of CCD camera. The paper deals also with the generation of planar polymer waveguide, taking into account problems connected with the adhesion to glass substrates.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 8.

Tytuł:: Gas Sensors Based on ZnO Structures
Autorzy:: Struk, P.
Pustelny, T.
Gołaszewska, K.
Borysiewicz, M.
Piotrowska, A.
Tematy:: 42.25.Hz
42.25.-p
42.82.Et
68.35.Ct; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399403.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the results of investigations concerning sensor structures based on porous layers of zinc oxide (ZnO) sensitive to a selected gaseous environment. The investigations comprised analyses of the influence of the gaseous environment on the optical properties of a sensor structure, in particularly on the change of the spectral characteristics of optical transmission within the range of ultraviolet light and in the visible range. These presented investigations were carried out in such a gaseous environment as nitrogen dioxide $NO_2$ in synthetic air.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 9.

Tytuł:: Inverse Laplace Transform of Some Rational Functions
Autorzy:: Wituła, R.
Tematy:: 02.30.Zz
42.30.Lr
42.25.-p
42.65.Wi; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1418095.pdf Link otwiera się w nowym oknie
Opis:: In this paper we propose a formula of recurrent nature for calculating the inverse Laplace transforms of some rational functions. The procedure and formulae enabling to determine the values of coefficients of obtained series are presented. Proposed procedure does not require any partial fraction decomposition. Moreover, it is proved that the radius of convergence of the received series (for the respective objective function) is equal to infinity. The proposed formula can find applications in wave optics and acoustics.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 10.

Tytuł:: The Waveguide Structure Based on the Polymer SU8 on a $SiO_2//Si$ Substrate
Autorzy:: Gut, K.
Drewniak, S.
Tematy:: 42.25.Hz
42.25.-p
42.70.-a
42.82.Et
68.35.Ct; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1493200.pdf Link otwiera się w nowym oknie
Opis:: The paper deals with considerations concerning planar waveguide structures, in which the polymer SU8 is used as the waveguide layer. The results of numerical calculations of the distribution of the field concerning structures of various thicknesses have been presented, and photos taken in the course of investigating the surface by means of a microscope of atomic forces. The results of calculations of sensitivity in relation to the refractive index of the cover layer at various thicknesses of the layer have been presented, too.
Dostawca treści:: Biblioteka Nauki

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