Search results

1

Gas Sensors Based on ZnO Structures

100%

Struk P., Pustelny T., Gołaszewska K., Borysiewicz M., Piotrowska A.

Acta Physica Polonica A

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2013

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vol. 124

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issue 3

567-569

EN

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.

2

Optical investigations of ZnO layers affected by some selected gases in the aspect of their application in optical gas sensors

100%

Struk P., Pustelny T., Gołaszewska K., Borysiewicz M. A., Piotrowska A.

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2015

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issue 4

3

Zinc Oxide Semiconductor for Photonics Structures Applications

73%

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.

4

Planar Optical Waveguides Based on Thin ZnO Layers

73%

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.

5

Interfacial Microstructure of Ni/Si-Based Ohmic Contacts To GaN

73%

Kamińska E., Piotrowska A., Jasiński J., Kozubowski J., Barcz A., Gołaszewska K., Bremser M., Davis R.

Acta Physica Polonica A

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1998

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vol. 94

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issue 3

383-386

EN

The microstructure of Ni/Si-based contacts to GaN has been studied using transmission electron microscopy methods. The transition from non-ohmic to ohmic behavior appears to correlate with the initial limited reaction of GaN with Ni and further Si-Ni reaction-driven decomposition of the interfacial GaN-Ni phase.

6

Terahertz Detection by the Entire Channel of High Electron Mobility Transistors

59%

Sakowicz M., Łusakowski J., Karpierz K., Knap W., Grynberg M., Köhler K., Valusis G., Gołaszewska K., Kamińska E., Piotrowska A., Caban P., Strupiński W.

Acta Physica Polonica A

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2008

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vol. 114

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issue 5

1343-1348

EN

GaAs/AlGaAs and GaN/AlGaN high electron mobility transistors were used as detectors of THz electromagnetic radiation at liquid helium temperatures. Application of high magnetic fields led to the Shubnikov-de Haas oscillations of the detection signal. Measurements carried out with a simultaneous modulation of the intensity of the incident THz beam and the transistor gate voltage showed that the detection signal is determined by the electron plasma both in the gated and ungated parts of the transistor channel. This result is of importance for understanding the physical mechanism of the detection in high electron mobility transistors and for development of a proper theoretical description of this process.

Refine search results

Gas Sensors Based on ZnO Structures

Optical investigations of ZnO layers affected by some selected gases in the aspect of their application in optical gas sensors

Zinc Oxide Semiconductor for Photonics Structures Applications

Planar Optical Waveguides Based on Thin ZnO Layers

Interfacial Microstructure of Ni/Si-Based Ohmic Contacts To GaN

Terahertz Detection by the Entire Channel of High Electron Mobility Transistors