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1
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Silicon Photonic Waveguides for Near- and Mid-Infrared Regions

100%
Stankovic S., Milosevic M., Timotijevic B., Yang P., Teo E., Crnjanski J., Matavulj P., Mashanovich G.
Acta Physica Polonica A
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2007
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vol. 112
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issue 5
1019-1024
EN
The basic building block of every photonic circuit is a waveguide. In this paper we investigate the most popular silicon waveguide structures in the form of a silicon-on-insulator rib waveguide. We also analyse two structures that can find applications in mid- and long-wave infrared regions: free-standing and hollow core omnidirectional waveguides.
2
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Zinc Oxide Semiconductor for Photonics Structures Applications

80%
Struk P., Pustelny T., Pustelny B., Gołaszewska K., Kamińska E., Piotrowska A., Borysiewicz M., Ekielski M.
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issue 6
1242-1245
EN
The paper presents investigations concerning the analysis of photonic structures with grating couplers. In the paper basic theoretically information on photonic structures with grating couplers is presented. The results of numerical investigations on photonic structures with grating couplers are discussed, too. Investigations show an essential influence of the geometrical parameters of grating couplers on the effectiveness of the input and output of optic power into and out of this photonic structure. In the paper the selected results of experimental realizations of photonic structures with grating couplers based on zinc oxide ZnO are presented.
3
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Study of Two-Dimensional Photonic Crystal Microcavities as a Function of Refractive Index

80%
Moukhtari R., Hocini A., Khedrouche D.
Acta Physica Polonica A
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2016
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vol. 129
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issue 4
556-558
EN
Quality factor of two-dimensional photonic crystals microcavity fabricated by SiO₂/ZrO₂ or SiO₂/TiO₂ in which the refractive index varied in the range of 1.51 to 1.58 has been investigated in the present paper. The structure studied consists of circular rods of radius r embedded in air slab, while a is the constant of triangular lattice. Finite difference time domain method with perfectly matched layers was used to calculate the transmission spectrum by FullWAVE software. The results of simulation clearly demonstrate the existences of resonance wavelength of which the position and the highest Q (Q ≈ 4×10⁵) value are strongly affected by refractive index. We demonstrate that the calculated Q factor for the designed cavity increases by a factor of three relative for a cavity without increasing the refractive index.
4
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The Sensitivity of Composite Bimodal Waveguide SU-8

80%
Gut K.
Acta Physica Polonica A
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2013
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vol. 124
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issue 3
602-605
EN
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.
5
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Planar Optical Waveguides Based on Thin ZnO Layers

61%
Struk P., Pustelny T., Gut K., Gołaszewska K., Kamińska E., Ekielski M., Pasternak I., Łusakowska E., Piotrowska A.
Acta Physica Polonica A
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2009
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vol. 116
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issue 3
414-418
EN
The paper quotes the results of investigations concerning planar optical waveguides with a high value of the refractive index, achieved basing on a broad-band gap semiconductor ZnO, deposited on glass or quartz substrates. The investigations were focused on the properties of the waveguides, determining the modal characteristics, the attenuation coefficient and the structure of the surface.
6
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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

61%
Gut K., Nabaglo D.
Acta Physica Polonica A
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2009
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vol. 116
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issue 3
307-311
EN
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.
7
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Comparison of the Sensitivity of a Polymer Waveguide in the Classical and Reverse Symmetry System

61%
Gut K., Drewniak S.
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issue 6
1133-1135
EN
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.
8
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Sensitivity of Polarimetric Waveguide Interferometer for Different Wavelengths

61%
Gut K., Zakrzewski A., Pustelny T.
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issue 6
1140-1142
EN
This publication presents experimental measurement methodology which allows to determine the characteristics of sensitivity planar differential interferometer. To confirm data reliability additional measurements were done such as simulations in OptiBPM software by Optiwave. Curves received from two methods: experimental and theoretical, were summed up and compared. Conclusions were made on their basis, for example the influence of used wavelengths or refractive index of single mode waveguide cladding on curves of sensitivity differential interferometer using planar waveguide received from the ion exchange method.
9
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The Influence of the Rotational Speed of the Polymer SU8 on the Thickness of the Waveguide Layer

61%
Gut K., Pustelny T., Nabagło D.
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issue 6
1136-1138
EN
The paper presents results of investigations concerning the measurement of the refractive index and thickness of planar waveguide structures, obtained by the photopolymerization of polymer SU8. Sodium-calcium glass was used as the substrate. As the knowledge of the quoted parameters is from the viewpoint of the structure of various types of optical sensors of crucial importance, the way of their determination has been presented. The paper deals also with the method of constructing planar polymer waveguides, taking into account problems connected with their adhesion to glass substrates.
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