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1

Optical properties of Nd:YbVO4 crystal

Liu F Q, Sun S Q, Gao C Y, Xu J Q

Optica Applicata

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2015

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Vol. 45, nr 1

63—70

EN

Optical characteristics of a new laser crystal Nd:YbVO4 were studied. The optical parameters of a-cut and c-cut Nd:YbVO4 crystals were calculated by the Judd–Ofelt theory. The absorption crosssection of a-cut Nd:YbVO4 crystal was 5.34×10–20 cm2 at 808 nm, while it was 4.20×10–18 cm2 of c-cut Nd:YbVO4 crystal. The properties of energy transfer between Nd and Yb ions in Nd:YbVO4 crystal were discussed. In the fluorescence spectra, a peak at 472 nm appeared, which resulted from the coupling interaction between two Yb ions.

2

Laser interference patterning of diamond-like carbon layers for directed migration and growth of smooth muscle cell depositions

Marczak J., Kusinski J., Major R., Rycyk A., Sarzynski A, Strzelec M., Czyz K

Optica Applicata

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2014

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Vol. 44, nr 4

575--586

EN

Seeding of cells on functional, biocompatible scaffolds is a crucial step in achieving the desired engineered tissue. The authors show the constructional solutions of the Nd:YAG pulse laser system with the Q-switch modulation for direct and interferential shaping of the surface of biocompatible materials. The two-channel interference system is distinguished by high control, simplicity and repetitiveness regarding laser energy level and dimensions of the surface structures. The experiments were conducted on hard, biocompatible substrates of amorphous carbon (diamond-like carbon, DLC) and were preliminarily tested on smooth muscle cell depositions.

3

Oznaczanie zawartości Y, Al, Nd oraz zanieczyszczeń w próbkach Y4Al2O9 (YAM) niedomieszkowanych i domieszkowanych neodymem

Harasimowicz-Siemko J., Karaś A., Sokołowska W., Dąbrowska D.

Materiały Elektroniczne

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2011

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T. 39, nr 2

26-31

PL

Celem niniejszej pracy było oznaczenie głównych pierwiastków (Y, Al, Nd) kryształów YAM niedomieszkowanych i domieszkowanych neodymem oraz zanieczyszczeń śladowych. Pierwszym etapem pracy było dobranie odpowiednich warunków pracy urządzenia do mikrofalowego roztwarzania w celu przeprowadzenia próbek do fazy ciekłej. Następnie wykonano analizę jakościową i półilościową z wykorzystaniem spektrografu emisyjnego w celu określenia poziomu zanieczyszczeń. Oznaczono za pomocą FAAS Al i Nd przy zastosowaniu 0,1% chlorku cezu (bufor jonizacyjny) i 0,2% chlorku lantanu (bufor chemiczny) oraz oznaczono itr za pomocą ICP-OES.

EN

The purpose of this study was to determine both the major elements (Y, Al, Nd) of YAM crystals, undoped and doped with neodymium, and impurities. The first stage of the study was the selection of conditions appropriate for microwave digestion in order to transfer the samples to the liquid phase. Then, the qualitative and semiquantitative analysis of the samples using emission spectrography was performed with a view to identifying the level of impurities. The concentration of aluminium and neodymium in YAM samples was determined by FAAS, using 0.1% of cesium chloride (ionization buffer) and 0.2% of lanthanum chloride (chemical buffer). The concentration of yttrium was measured by the ICP-OES method.

4

Photoluminescence study of Nd3+-doped Si-rich silica films

Breard D., Gourbilleau F., Belarouci A., Dufour C., Rizk R.

Optica Applicata

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2006

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Vol. 36, nr 2-3

187-192

EN

Nd3+-doped silicon-rich silicon oxide thin films have been fabricated by reactive magnetron co-sputtering of a pure silica target topped with Nd2O3 chips. The incorporation of silicon excess in the films has been controlled by the hydrogen partial pressure PH2 introduced in the plasma. Photoluminescence experiments have been made at room temperature using a non resonant excitation with Nd3+ ions. The influences of Nd3+ content and PH2 have been studied to improve the Nd3+ emission. Photoluminescence spectra reveal an enhancement of the Nd3+ emission at 0.9 m and 1.1 m when silicon nanoclusters and Nd3+ are embedded in a SiO2 matrix.