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1
Content available remote Influence of waveguide parameters on the difference interference in optical planar structure
100%
Karasiński P.
Optica Applicata
|
2002
|
tom Vol. 32, nr 4
775-795
EN
The paper presents studies involving the influence of waveguide parameters on the sensitivity of planar sensor with the application of difference interference. Gradient waveguides and homogeneous waveguides have been taken into consideration. A new structure of difference interferometer has been proposed, constructed with the use of gradient waveguide and homogeneous dielectric layer. The suggested structure provides much higher sensitivity levels as compared to the currently designed structures.
2
Optical Planar Sensors Using Evanescent Wave Spectroscopy
100%
Karasiński P.
|
2000
|
tom Vol. 21
109-116
EN
An overview is given on physical principle of the optical waveguide planar sensor using evanescent waveguide spectroscopy.
3
Planarne sprzęgacze siatkowe do zastosowań w spektroskopii pola zanikającego
100%
Karasiński P.
Elektronika : konstrukcje, technologie, zastosowania
|
2008
|
tom Vol. 49, nr 6
94-96
PL
Praca dotyczy zastosowania wejściowego sprzęgacza siatkowego w spektroskopii pola zanikającego. Sprzęgacz siatkowy o okresie Λ = 1000 nm był wytworzony na światłowodzie planarnym SiO₂:TiO₂ z zastosowaniem metody zol-żel i odciskania wzoru siatki. Praca przedstawia wyniki analizy teoretycznej struktury sensorowej i wyniki badań eksperymentalnych wytworzonych sprzęgaczy siatkowych.
EN
The work involves the applications of input grating coupler in evane­scent field spectroscopy. Surface relief grating with period Λ = 1000nm on planar SiO₂:TiO₂ waveguides were fabricated by combination of a dip-coating method (sol-gel) with an embossing technique. The work presents the results of theoretical analysis of the sensor structure and the results of experimental research on the produced grating couplers.
4
Content available remote Struktury optyki zintegrowanej do zastosowań w sensorach biochemicznych
100%
Karasiński P.
Przegląd Elektrotechniczny
|
2014
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tom R. 90, nr 5
102--105
PL
W pracy przedstawiono podstawy spektroskopii pola zanikającego i struktury optyki zintegrowanej do zastosowań w sensorach biochemicznych. Struktury te wytwarzane są metodą zol-żel. Przedstawiony jest sprzęgacz siatkowy, paskowe światłowody żebrowe i sprzęgacz kierunkowy.
EN
In the paper are presented fundamentals of the evanescent filed spectroscopy and integrated optic structures for an application in biochemical sensors. These structures are fabricated via sol-gel route. The grating couplers, rib waveguides and directional couplers are presented.
5
Content available remote Sol-gel derived sensitive films for ammonia evanescent wave sensors
100%
Karasiński P.
Optica Applicata
|
2003
|
tom Vol. 33, nr 2-3
477-487
EN
The paper presents the results of investigation on the application of sol-gel technique to production of sensitive films. The sensitive films are made using silica SiO2 in which an indicator is bound. Bromocresol purple was applied as the indicator. The films produced are sensitive to ammonia.
6
Content available remote Sol-gel derived optical waveguide films for planar sensors with phase modulation
100%
Karasiński P.
Optica Applicata
|
2004
|
tom Vol. 34, nr 4
467-475
EN
The paper presents the results of investigation of the technology of optical waveguide films produced with the sol-gel technique. The silica-titania films were deposited on glass substrates by a deep coating method. The influence of with drawal speed and aging time of sol on the refractive index and film thickness has been tested.
7
Content available remote Influence of technological parameters on the properties os sol-gel silica films
100%
Karasiński P.
Optica Applicata
|
2005
|
tom Vol. 35, nr 1
117-128
EN
The paper presents the influence of selected technological parameters on the properties of silica films produced in sol-gel processes using the dip-coating method. The influence of water content and catalyst content was investigated as well as the influence og aging time of sols. It was demonstrated that the conditions of film deposition and the content of catalyst have a great influence on the thickness of the films produced. The greatest influence on the refractive index is exerted by molar ratio TEOS:H2O. Together with the rise of aging time of the sol its properties are changing, and the changes depend on pH.
8
Content available remote Sensor properties of planar waveguide structures with grating couplers
100%
Karasiński P.
Opto-Electronics Review
|
2007
|
tom Vol. 15, No. 3
168-178
EN
The paper presents the results of theoretical analysis as well as the results of experimental research involving planar sensor structures with input grating couplers of the period Δ = 800 nm. In the theoretical part of the paper we discussed the influence of the parameters of a sensor structure on it sensitivities. The experimental part of the work presents the results of experimental research involving the influence of refractive index of the cover on the coupling characteristics of sensor structures with grating couplers. The full widths at half maximum (FWHM) were from 0.023° to 0.029°. For the investigated structures we estimated detection thresholds for the changes of refractive index of the cover and the changes of sensitive film thickness. It has been demonstrated that by the application of the elaborated structures we can detect minimal changes of the refractive index (Δnc)min = 2.1×⁻⁶ when the refractive index of the cover nc = 1.333 and (Δnc)min =1.0×⁻⁶ when nc = 1.515. For sensitive films of the thickness w<100 nm, by using the elaborated structures, we can detect mean changes of the thickness along the values lower than 10⁻³ nm.
9
Content available remote Embossable grating couplers for planar evanescent wave sensors
100%
Karasiński P.
Opto-Electronics Review
|
2011
|
tom Vol. 19, No. 1
10-21
EN
The paper presents input grating couplers to be applied in planar evanescent wave sensors. Waveguide films SiO₂:TiO₂ were obtained using the sol-gel method, and grating couplers with a groove density of 1000 g/mm and 2400 g/mm were produced using the method of master grating embossing in sol film. The influence of refractive index of the cover on incoupling angles was presented. Basing on the experimental results, detection limits involving the changes of effective indexes and refractive indexes of the cover for the investigated planar structures were determined. Sensor structures with the couplers having a groove density of 1000 g/mm enable to detect minimum changes of the effective index below 3.3×10⁻⁷ and to detect minimum changes of refractive index of the cover below 2.3×10⁻⁶. Detection limits for the structures with couplers having the groove density of 2400 g/mm are over twofold higher.
10
Content available remote Optical uniform/gradient waveguide sensor structure-characterization
100%
Karasiński P.
Opto-Electronics Review
|
2011
|
tom Vol. 19, No. 1
1-9
EN
The paper presents the characterization of a composite uniform/gradient waveguide sensor structure. The results of theoretical analysis and experimental studies have been presented. The influence of sensor structure parameters on homogenous sensitivity and on surface sensitivity has been analyzed. Gradient layers for composite sensor structures were produced using the ion-exchange method, and the uniform layers, using the sol-gel method. In the experimental studies, involving the produced sensor structures, a prism coupler and a grating coupler were applied. Excellent agreement between the results of theoretical analysis and experimental studies has been achieved.
11
Warstwy sensorowe na bazie porowatej krzemionki do zastosowań w światłowodowych czujnikach amoniaku
63%
Karasiński P. , Tyszkiewicz C.
Elektronika : konstrukcje, technologie, zastosowania
|
2010
|
tom Vol. 51, nr 6
119-122
PL
W światłowodowych czujnikach chemicznych najczęściej jako warstwy sensorowe wykorzystywane są warstwy absorpcyjne, w których na skutek oddziaływania substancji chemicznej zmienia się absorpcja. Praca dotyczy technologii wytwarzania i właściwości absorpcyjnych warstw sensorowych do czujników amoniaku. Warstwy te zbudowane są z porowatej krzemionki, która jest matrycą wiążącą indykatory. Stosowanymi w badaniach indykatorami były; purpura bromokrezolowa i błękit bromotymolowy. Wysoka porowatość (∼50%) warstwy sensorowej sprzyja jej regeneracji. W pracy przedstawiono charakterystyki spektralne wytwarzanych warstw oraz wyniki badań ich właściwości sensorowych.
EN
Waveguide chemical sensors usually use sensitive films within which occur absorption phenomena. Absorption of light is a result of the interaction of sensed chemical substances with the molecules the films are composed off. Presented work is devoted to the fabrication technology and absorption properties of sensitive films designed for optical waveguide ammonia sensors. The films are made of porous silica, which is a matrix that bounds the pH indicators. In the scope of presented work, the bromocresol purple, and bromothymol blue were used as the indicators. The high porosity (50%) of sensing films fosters their regeneration. Spectral characteristics of fabricated films as well as the results of investigations on their sensing properties are presented in this work.
12
Content available remote Jedno- i dwuwarstwowe struktury antyrefleksyjne wytwarzane metodą zol-żel do zastosowań w fotoogniwach krzemowych
63%
Skolik M. , Karasiński P.
Przegląd Elektrotechniczny
|
2017
|
tom R. 93, nr 8
73--76
PL
Pomimo pojawienia się wielu nowych rodzajów fotoogniw słonecznych, fotogniwa krzemowe nadal odgrywają istotną rolę. Wysoki współczynnik załamania krzemu sprawia, że ponad 34% fotonów promieniowania słonecznego z zakresu absorpcji krzemu ulega od niego odbiciu i nie generuje w nim ekscytonów. Odbicie światła można istotnie zmniejszyć teksturując powierzchnię krzemu, wytwarzając na niej strukturę antyrefleksyjną albo stosując jednocześnie oba rozwiazania. Praca dotyczy jedno- i dwuwarstwowych struktur antyrefleksyjnych wywtarzanych metodą zol-żel i techniką dip-coating na podłożach krzemowych. Dla struktury jednowarstwowej osiągnięto ważony współczynnik odbicia fotonów Rw 9%, natomiast dla struktury dwuwarstwowej osiągnięto Rw<4%. W pracy przedstawiano optymalizację teoretyczną struktur antyrefleksyjnych, technologię ich wytwarzania oraz wyniki badań eksperymentalnych. Osiągnięto doskonałą zgodność wyników analizy teoretycznej z wynikami eksperymentalnymi.
EN
Besides many different types of photovoltaic solar cells, silicon solar cells are still of significant importance. Bare silica’s high refraction index leads to greater than 34% reflection of solar light photones, within silica’s absorption band, from its surface without generating excitons. Reflection loss can be significantly reduced with the use of surface texturing and/or antireflective coatings. The most beneficial effect is achieved when combinig both, surface texturing and antireflective coatings. This work presents single and double layer Anti Reflective Structures (ARS’s) derived from sol-gel process for application in silicon photovoltaic cells. Weighted average reflection of a single layer ARS is Rw 9%, whereas double layer ARS provides weighted average reflection Rw<4%. In this work theoretical optimization of ARS’s, technological process of structure fabrication as well as experimental results are demonstrated. Theoretical data shows excellent correlation with experimental results.
13
A New Structure of Planar Difference Interferometer
63%
Karasiński P. , Zielonka I.
|
2000
|
tom Vol. 21
123-126
EN
A new structure of planar difference interferometer has been proposed, constructed with the use of gradient waveguide and homogenous dielectric layer. The suggested structure provides much higher sensitiyity levels as compared to currently designed structures.
14
Planar Waveguides with Diffracion Gratings (rewiev paper)
63%
Zielonka I. , Karasiński P.
|
2001
|
tom Vol. 22
293-302
EN
In the paper the diffracion gratings are presented. One presented the technolofy fabrication mathods of diffraction gratingd as wall as the possibility their applications. The diffraction gratings are very important elements for devices of integrated optics and integrated acoustics.
15
Optical Planar Chemical Sensor with Amplitude Modulation -Theoretical Analysis
63%
Karasiński P. , Rogoziński R.
|
2000
|
tom Vol. 21
117-122
EN
The paper presents theoretical analysis of planar optical waveguide of the chemical sensor with amplitude modulation. The analysis of the investigated structure is focused on refractive profiles made using ion exchange in glass as well as on the parameters of sensor layer madę using sol-gel technique. The influence of waveguide parameters, sensor layer parameters (refractive index and thickness) and refractive index of the environment on attenuation coefficients of the guided modes are considered. For the theoretical analysis of the iiwestigated structures the Vassell's matrix method has been used.
16
Content available remote Optical waveguides produced in ion exchange process from the solutions of AgNO₃-NaNO₃ for planar chemical amplitude sensors
63%
Rogoziński R. , Karasiński P.
Opto-Electronics Review
|
2005
|
tom Vol. 13, No. 3
229-238
EN
The paper presents the results of studies on the production of planar optical waveguides to be applied in amplitude chemical sensors, using ion exchange technique Ag+<=>Na+ from the solutions of AgNO₃-NaNO₃. Substrates from BK-7 glass and from soda-lime glass were applied. The influence of the parameters of the applied technologies on the shape of refractive index profiles of the produced planar waveguides was presented. For the produced waveguides the dependence was determined between modal attenuation coefficients as the function of mode order as well as the uniformity parameters of modes reaction with absorption sensor layer.
17
Content available remote The silica-titania layer deposited by sol-gel method on the AISI 316L for contact with blood
51%
Walke W. , Paszenda Z. , Karasiński P. , Basiaga M.
Journal of Achievements in Materials and Manufacturing Engineering
|
2013
|
tom Vol. 56, nr 2
75--82
EN
Purpose: The study analyses influence of surface modification of Si:Ti on physical and chemical properties of samples made from AISI 316L steel in solution simulating blood-vascular system. Design/methodology/approach: Sol-gel layer was selected on the ground of data from literature. TEOS and TET made the ground for initial solution. Application of the layer on the surface of samples made of AISI 316L steel was preceded by mechanical working - grinding (Ra = 0.40 μm) and mechanical polishing (Ra = 0.12 μm). Corrosion resistance tests were performed on the ground of registered anodic polarisation curves and Stern method. In order to evaluate phenomena that take place on the surface of the tested alloys EIS was also applied. The tests were performed in artificial blood plasma at the temperature of T = 37.0±1°C and pH = 7.0±0.2. Findings: Obtained results on the ground of voltammetric and impedance tests showed differentiated electrochemical properties of AISI 316L steel depending on the type of surface treatment. Practical implications: Suggested subject matter of the article supports development of entrepreneurship sector due to high social demand for this type of technologies and relatively easy way of putting obtained laboratory tests data into inductrial and clinical practice. Originality/value: Suggestion of proper variants of surface treatment with application of sol-gel method is meaningful in future perspective and it shall promote determination of technological conditions with precise parameters of creation of oxide layers on metallic implants made of AISI 316L steel that come into contact with blood.
18
Content available Żebrowe światłowody paskowe do zastosowań sensorowych
51%
Karasiński P. , Rogoziński R. , Tyszkiewicz C.
Pomiary Automatyka Kontrola
|
2010
|
tom R. 56, nr 6
541-543
PL
Zmiany efektywnych współczynników załamania w czujnikach światłowodowych pracujących w oparciu o spektroskopię pola zanikającego mierzone są z zastosowaniem sprzęgaczy siatkowych lub interferometrów. Podstawowym elementem interferometrów planarnych są światłowody paskowe. Przedstawiana praca dotyczy żebrowych światłowodów paskowych. Otrzymywane metodą zol-żel warstwy falowodowe SiO2:TiO2 są selektywnie maskowane z zastosowaniem tradycyjnej fotolitografii a następnie trawione chemicznie. W ten sposób zostały wytwarzane jednomodowe żebrowe światłowody paskowe i sprzęgacze kierunkowe. W pracy przedstawione są wyniki analizy teoretycznej światłowodów żebrowych i wyniki badań eksperymentalnych wytworzonych struktur.
EN
Basic elements of planar interferometers are the channel waveguides. Presented work refers to the channel rib waveguides. In our previous work [7] we offered the production method of rib channel waveguides with the application of traditional photolithography and wet chemical etching of sol-gel derived silica-titania waveguide films. In this work we present new results of our research on rib waveguides and directional couplers. The theoretical analysis of rib waveguides was presented as well as the results of experimental investigations on the fabricated structures. The investigations on channel waveguides of the rib height of 5 nm was carried out for wavelengths: λ=677 nm. The waveguide films used in rib waveguides manufacturing technology are characterized by high refractive index (˜1.8) and ultra-low attenuation of 0.15 dB/cm. Rib waveguides of width w<4 Μm are monomode. For the rib waveguides we obtained the attenuation of (1.5š0.1) dB/cm. Rib waveguides of such an attenuation can be applied in the technology of integrated optics systems in sensor applications, and in particular for the construction of interferometers of Mach-Zehnder, Young or Michelson. The improvement of technology, and in particular the improvement in the quality of photolithographic masks should contribute to further decrease of attenuation of the produced rib waveguides.
19
Content available Ocena własności fizykochemicznych warstwy SiO2 w warunkach odkształcenia
51%
Król A. , Walke W. , Basiaga M. , Karasiński P.
Aktualne Problemy Biomechaniki
|
2016
|
tom z. 11
81--86
PL
W pracy przeprowadzono badania odporności korozyjnej, twardości oraz adhezji warstwy SiO2 naniesionej na powierzchnię stopu Ni-Ti. Badania realizowano zarówno dla próbek nieodkształconych, jak i odkształconych. Badania odporności na korozję przeprowadzono metodą potencjodynamiczną i impedancyjną w warunkach symulujących środowisko tkankowe – roztwór Ringera. Z kolei adhezję warstwy do podłoża oceniano metodą zarysowania (scratch-test). Do wyznaczenia twardości warstwy zastosowano metodę Vickersa wykorzystując wgłębnik Berkovicha. Przeprowadzone badania nie wykazały znaczących zmian własności fizykochemicznych warstw poddanych odkształceniu w stosunku do warstw nieodkształconych.
EN
The project preformed researches corrosion resistance, hardness and adhesion of SiO2 layer on Ni-Ti alloy. Researches were realized on deformed and not deformed specimen. Corrosion resistance research was performed by using potentiodynamic and impedance methods in conditions which simulate tissue environment – Ringer solution. Adhesion layer to metal substrate was evaluate by scratch test method. To get the hardness of layer the Vickers method with indenter Berkovich was used. The studies which were done did not show significant changes of physical-chemical properties for deformed and not deformed specimen.
20
Investigation of interference Te0-Te1 modes in planar difference interferometer
51%
Wójcik W. , Gut K. , Karasiński P. , Opilski A.
|
|
tom Vol. 19
281-288
EN
The work presents the potentials for the application of the mode interference of the same polarization states (TE0-TEl) to monitor the changes of refractive index. The planar waveguides were produced using the ion exchange technique Na+-K+ in the glass BK-7.
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