Number of found documents: 483
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Investigation of thermal depolarization in high-power TGG ceramic rods
Lucianetti, Antonio
2015 - English
Wavefront deformation and thermal stress birefringence were evaluated for high-power TGG ceramic rods. The real laser beam profile used to heat the TGG ceramics was considered in the calculations. The numerical model was bench-marked with experimental data at about 100 W and then used to study the scalability of a similar TGG-based optical isolator up to 1 kW average power. Keywords: thermal modeling; optical isolation; birefringence Available at various institutes of the ASCR
Investigation of thermal depolarization in high-power TGG ceramic rods

Wavefront deformation and thermal stress birefringence were evaluated for high-power TGG ceramic rods. The real laser beam profile used to heat the TGG ceramics was considered in the calculations. The ...

Lucianetti, Antonio
Fyzikální ústav, 2015

Characterization of amorphous and microcrystalline Si layers and ZnO layers on glass
Vaněček, Milan; Holovský, Jakub; Poruba, Aleš; Remeš, Zdeněk; Purkrt, Adam
2015 - English
Optical and photoelectrical properties of materials from TEL Solar were characterized in the Institute of Physics, AS CR in a broad spectral region and a high dynamic range. Conclusions on material properties with respect to thin film silicon solar cells were drawn. Keywords: optical properties; amorphous silicon; microcrystalline silicon; ZnO Available at various institutes of the ASCR
Characterization of amorphous and microcrystalline Si layers and ZnO layers on glass

Optical and photoelectrical properties of materials from TEL Solar were characterized in the Institute of Physics, AS CR in a broad spectral region and a high dynamic range. Conclusions on material ...

Vaněček, Milan; Holovský, Jakub; Poruba, Aleš; Remeš, Zdeněk; Purkrt, Adam
Fyzikální ústav, 2015

In situ XPS characterization of diamond films after AR.sup.+./sup. cluster ion beam sputtering
Artemenko, Anna; Babchenko, Oleg; Kozak, Halyna; Ukraintsev, Egor; Ižák, Tibor; Romanyuk, Olexandr; Potocký, Štěpán; Kromka, Alexander
2015 - English
In this work, in situ XPS analysis of chemical composition of H- and O-terminated nano- and microcrystalline diamond (NCD and MCD) films before and after their sputtering by the Ar+ cluster ion beam was investigated. Scanning electron microscopy confirmed sputtering of all diamond surfaces with a rate about 0.5 nm/min. Raman spectroscopy and XPS revealed surface graphitization of diamond surface induced by sputtering. Moreover, XPS data showed the presence of about 0.7 % of Ar atoms on the investigated diamond surface after 66 min of sputtering. Also, oxygen residuals were still presented on the H-NCD surface after 66 min of sputtering. In contrast, no oxygen was found on the H-MCD surface just after 2 min of sputtering. Surface composition is discussed in respect to the diamond films growth parameters and surface structure. Keywords: diamond; depth profiling; XPS; sputtering; Raman Available at various institutes of the ASCR
In situ XPS characterization of diamond films after AR.sup.+./sup. cluster ion beam sputtering

In this work, in situ XPS analysis of chemical composition of H- and O-terminated nano- and microcrystalline diamond (NCD and MCD) films before and after their sputtering by the Ar+ cluster ion beam ...

Artemenko, Anna; Babchenko, Oleg; Kozak, Halyna; Ukraintsev, Egor; Ižák, Tibor; Romanyuk, Olexandr; Potocký, Štěpán; Kromka, Alexander
Fyzikální ústav, 2015

AlSb/InAsSb/AlSb deep QWs for the two band high temperature superlinear luminescence
Hulicius, Eduard; Hospodková, Alice; Pangrác, Jiří; Mikhailova, M.
2015 - English
InAlAsSb/GaSb based hetero-nanostructures with deep quantum wells grown on GaSb are promising materials for the optoelectronic devices for near- and mid-IR spectral regions. Optical power and quantum efficiency of the LEDs based on the narrow bandgap semiconductor compounds (InGa)(AsSb) are limited by the nonradiative Auger recombination. Earlier we have proposed a method to increase the optical power in the bulk narrow bandgap and later in GaSb-based nanostructures with a deep QW by the effect of impact ionization on the QW with high band offset. Keywords: quantum wells; luminescence; AlSb/InAsSb/AlSb Available at various institutes of the ASCR
AlSb/InAsSb/AlSb deep QWs for the two band high temperature superlinear luminescence

InAlAsSb/GaSb based hetero-nanostructures with deep quantum wells grown on GaSb are promising materials for the optoelectronic devices for near- and mid-IR spectral regions. Optical power and quantum ...

Hulicius, Eduard; Hospodková, Alice; Pangrác, Jiří; Mikhailova, M.
Fyzikální ústav, 2015

Labio, a.s. – studie možností rozšíření plynového chromatografu
Divoký, Martin
2015 - Czech
Projekt byl zaměřen na testování a vývoj UV plynového chromatografu Labio G11. Spektrometr chromatografu byl modifikován, aby došlo k rychlejšímu propláchnutí vnitřního prostoru dusíkem (neabsorbuje v UV) a byla uspíšena připravenost k provozu. Dále byla otestována citlivost spektrometru v UV pod 150 nm a navrženy možnosti rozšíření citlivosti v této oblasti. This project aimed at testing and development of a UV gas chromatograph Labio G11. A spectrometer from the chromatograph was modified in order to increase nitrogen gas flow in the device and speed at which the inner of the spectrometer is filled with nitrogen (that doesn’t absorb in UV). This allowed decreasing startup time of the spectrometer. Additionally, sensitivity of the spectrometer in region below 150 nm was tested and ways to increase this sensitivity were proposed. Keywords: UV detection; UV absorption; gas flow; gas mixing Available at various institutes of the ASCR
Labio, a.s. – studie možností rozšíření plynového chromatografu

Projekt byl zaměřen na testování a vývoj UV plynového chromatografu Labio G11. Spektrometr chromatografu byl modifikován, aby došlo k rychlejšímu propláchnutí vnitřního prostoru dusíkem (neabsorbuje v ...

Divoký, Martin
Fyzikální ústav, 2015

Fabrication methods of diamond coated Love wave SAW biosensors for bacterial detection applications
Drbohlavová, L.; Bulíř, J.; Valeš, Václav; Jákl Křečmarová, M.; Taylor, Andrew; Talbi, A.; Soltani, A.; Mortet, Vincent
2015 - English
Pathogen detection has a huge importance in the food industry and it can play significant role in the medical practice. This paper focus on the fabrication methods of diamond coated Love wave surface acoustic wave (LW-SAW) biosensors for bacteria detection. LW-SAW sensors have been fabricated on AT-quartz crystals. Interdigitated transducers have been patterned by RF sputtering and photolithography techniques. Amorphous silicon oxide (SiO2) guiding layer and nano-crystalline diamond layer were both deposited by plasma enhanced chemical vapor deposition at low temperature. Preliminary experimental study of diamond surface termination for sensors bio-functionalization is also reported. Keywords: biosensors; LW-SAW Available at various institutes of the ASCR
Fabrication methods of diamond coated Love wave SAW biosensors for bacterial detection applications

Pathogen detection has a huge importance in the food industry and it can play significant role in the medical practice. This paper focus on the fabrication methods of diamond coated Love wave surface ...

Drbohlavová, L.; Bulíř, J.; Valeš, Václav; Jákl Křečmarová, M.; Taylor, Andrew; Talbi, A.; Soltani, A.; Mortet, Vincent
Fyzikální ústav, 2015

Plazmatická příprava tlustých kovových vrstev pro mechanické rytí blejzovaných difrakčních mřížek
Olejníček, Jiří
2015 - Czech
Smluvní výzkum byl zaměřen přípravu a optimalizaci procesu depozice vybraných tlustých kovových vrstev o tloušťce 5 až 10 µm na leštěné skleněné substráty. Ze strany zadavatele byl kladen důraz zejména na mechanické vlastnosti vrstev: adheze, porozita, homogenita, tvrdost a časová stálost. Contract research was focused on preparation and optimization of the deposition process of the selected thick metal layers with a thickness 5 to 10 microns on a polished glass substrates. The emphasis was mainly on the mechanical properties of films: adhesion, porosity, homogeneity, hardness and time stability. Keywords: magnetron sputtering; thin films; surface properties Available at various institutes of the ASCR
Plazmatická příprava tlustých kovových vrstev pro mechanické rytí blejzovaných difrakčních mřížek

Smluvní výzkum byl zaměřen přípravu a optimalizaci procesu depozice vybraných tlustých kovových vrstev o tloušťce 5 až 10 µm na leštěné skleněné substráty. Ze strany zadavatele byl kladen důraz ...

Olejníček, Jiří
Fyzikální ústav, 2015

DEL a.s. – Využití laserové technologie
Flimelová, Miroslava; Bičišťová, Radka; Brajer, Jan
2015 - Czech
Cílem studie je poskytnout zadavateli dostatečné a konkrétní informace a podklady k výběru a následnému nákupu laserového zdroje a vhodného příslušenství k němu. Laserový zdroj bude využit jako technologický nástroj v budovaném inovačním centru společnosti k technologickým zkouškám, poloprovozním testům a vývoji nových komerčních aplikací. The aim of the study is to provide sufficient and specific information and documents on the selection and subsequent purchase of a laser source suitable accessories for it . The laser source will be used as a technological tool in building the company's innovation center for technological tests , pilot tests and develop new commercial applications . Keywords: laser welding; hardening; engraving; powder coating Available at various institutes of the ASCR
DEL a.s. – Využití laserové technologie

Cílem studie je poskytnout zadavateli dostatečné a konkrétní informace a podklady k výběru a následnému nákupu laserového zdroje a vhodného příslušenství k němu. Laserový zdroj bude využit jako ...

Flimelová, Miroslava; Bičišťová, Radka; Brajer, Jan
Fyzikální ústav, 2015

Mitsubishi Heavy Industries Aero Engines, Ltd. – Feasibility test of short pulse laser drilling on metal alloy plate
Miura, Taisuke
2015 - English
We have constructed a laser drilling station for metal plates supplied by MHIAEL. We have succeeded to demonstrate the fast drilling on the metal plates within 0.1sec using our thin disk regenerative amplifier. This result leaded to the additional contract with the guest on February 2016. Keywords: short pulse laser; drilling; metal alloy Available at various institutes of the ASCR
Mitsubishi Heavy Industries Aero Engines, Ltd. – Feasibility test of short pulse laser drilling on metal alloy plate

We have constructed a laser drilling station for metal plates supplied by MHIAEL. We have succeeded to demonstrate the fast drilling on the metal plates within 0.1sec using our thin disk regenerative ...

Miura, Taisuke
Fyzikální ústav, 2015

Utsunomiya University – Prototyping of pump laser optics for compact thin disk head
Miura, Taisuke
2015 - English
We have constructed a compact thin disk head designed by HiLASE. We demonstrated the CW output from the thin disk head with the efficiency of higher than 30% and the good beam quality. This result leaded to the additional contract with Utsunomiya University on February 2016. Keywords: pump laser; optics; compact thin disk head Available at various institutes of the ASCR
Utsunomiya University – Prototyping of pump laser optics for compact thin disk head

We have constructed a compact thin disk head designed by HiLASE. We demonstrated the CW output from the thin disk head with the efficiency of higher than 30% and the good beam quality. This result ...

Miura, Taisuke
Fyzikální ústav, 2015

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