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Browsing Science and Society- the Use of Light by Title

Browsing Science and Society- the Use of Light by Title

Now showing items 4-23 of 36

Behaviour of endothelial cells on surfaces functionalized by GaN nanoparticles

BRANISTE, Tudor; TIGINYANU, Ion; HORVATH, Tibor; RAEVSCHI, Simion; CEBOTARI, Serghei; LUX, Marco; HAVERICH, Axel; HILFIKER, Andres (Technical University of Moldova, 2015)

In this work, we identify the mechanisms of interaction between GaN semiconductor compound nanoparticles and living endothelial cells. Cellular viability and uptaking of nanoparticles by cells as well as adhesion and ...
Bioinspired Optical Materials

ZOLLFRANK, Cordt (Universitatea Tehnică a Moldovei, 2015)

Natural systems are able to produce materials with unique properties. The formation of complex three-dimensional structures in nature is of fundamental importance to break the limits imposed by available construction ...
Cavity quantum dynamics with pumped few-level emitters

CIORNEA, Viorel; BARDETSKI, Profirie; MACOVEI, Mihai A. (Technical University of Moldova, 2015)

Cavity quantum electrodynamics attracted a lot of attention due to possible applications in various areas. Here we demonstrate increased photon-photon correlations in a setup consisting of a moderately pumped two-level ...
Chaos-based optical communication of semiconductor lasers with air gaps

OLOINIC, T.; RUSU, S. S.; TRONCIU, V. Z. (Technical University of Moldova, 2015)

We report the numerical results of the dynamical behavior of a novel integrated semiconductor laser subject to multiple optical feedback loops. The laser’s setup consists of distributed feedback active section coupled to ...
Device for controlled hypothermia on Fuzzy logic algorithms

COJOCARU, Victor (Technical University of Moldova, 2015)

We propose a sample of a device for therapeutics with hypothermia used in medical purposes for directed cooling of specific tissues using Peltier, elements. Peltier cooling elements allow elaboration of a small mobile ...
Discovery of the laser: Historical aspects

TIGINYANU, Ion (Technical University of Moldova, 2015)

The main steps undertaken by the mankind towards the discovery of the laser are reviewed, starting from the development of quantum theory of radiation by Albert Einstein in 1917, first demonstration of stimulated emission ...
Enhanced efficiency of p-GaN/n-ZnO light-emitting diodes by using NiO and ZnSe interlayers

SIRKELI, V. P.; YILMAZOGLU, O.; KÜPPERS, F.; HARTNAGEL, H. L. (Technical University of Moldova, 2015)

We report the results from numerical simulations of p-GaN/n-ZnO light-emitting diodes (LEDs) with different architectures. p-GaN/n-ZnO, p-GaN/p-NiO/n-ZnO, and p-GaN/p-NiO/n-ZnSe/n-ZnO LED structures have been examinated ...
Entanglement and cooperative effects between the mode components of raman process in cavity and their analogy with atomic collective effects

ENAKI, Nicolae A. (Technical University of Moldova, 2015)

It is proposed the cooperative excitation and absorption of three cavity modes which corresponds to pump, Stokes and anti-Stokes photons stimulated by the atomic inversion. The three modes collective Roman emission is ...
Exciton–Polariton laser under the influence of the Landau quantization, Rashba spin-orbit coupling and Zeeman splitting

MOSKALENKO, S. A. (Technical University of Moldova, 2015)

The report consists from two parts. In the first of them I present a review of the investigations effectuated during last decades of the phenomenon of the Bose-Einstein Condensation (BEC) in the system of two-dimensional ...
Expected thermoelectric properties of nanostructured TTT(TCNQ)2 crystals

SANDULEAC, I. I. (Technical University of Moldova, 2015)

Advanced thermoelectric materials represent a keystone for development of new efficient devices for energy harvesting, local power generation from the waste heat and direct cooling systems. Thermal absorption of IR radiation, ...
Fabrication of ultrathin GaN membranes with relatively large sizes for practical applications

CIOBANU, Vladimir; BRANISTE, Tudor; POPA, Veaceslav; GRIDENCO, Oleg; BATIRI, Mihail; TIGINYANU, Ion (Technical University of Moldova, 2015)

We propose for the implementation a cost effective technological route allowing one to fabricate ultrathin GaN membranes for sensor applications. The main efforts are focused on the design and development of active parts ...
Hybrid folded phonons in twisted graphene

NIKA, D. L.; COCEMASOV, A. I.; BALANDIN, A. A. (Technical University of Moldova, 2015)

We theoretically investigated phonon dispersion and specific heat in AA-stacked, AB-stacked and twisted bilayer graphene with various rotation angles. Twisting bilayer graphene leads to emergence of new phonon branches – ...
IR absorption by free carriers in nanostructured organic crystals of tetrathiotetracene-iodide

CASIAN, Anatolie (Technical University of Moldova, 2015)

The coefficient of long wave infra red (IR) absorption α is calculated for nanostructured organic crystals of tetrathiotetracene-iodide, TTT2I3, at room temperature as a function of radiation frequency v in the interval ...
Laser - magic tool for medical applications

CIOBANU, Nellu (Technical University of Moldova, 2015)

Recently, stimulated radiation produced by laser plays an important and increasing role in biology and medical applications. A laser is a device that emits a high intensity, narrow beam of light, usually of one single color ...
Lasing properties of ZnO nanostructures

ZALAMAI, V. (Technical University of Moldova, 2015)

On the base of zinc oxide was developed solar cells, although it efficiency is lower then industrial one using cost effective and uncomplicated technology of chemical bath deposition (CBD) makes this material very perspective. ...
Light interacting with interconnected Nanomaterials: from extreme absorbers to fast sensors

ADELUNG, Rainer (Technical University of Moldova, 2015)

Almost perfect black and white materials can be created on the basis of highly porous 3D materials from metal oxide semiconductors like ZnO or SnO2 in a flame transport synthesis. The white appearance originates by the ...
Luminescence and optical second harmonic generation in atomically thin layered transition metal dichalcogenides

KULYUK, Leonid (Technical University of Moldova, 2015)

This work concerns the photoluminescence (PL) properties of 2H-WS2, 2H-WSe2, 2H- and 3R-MoS2 bulk crystals and 2D flakes intercalated with halogen molecules, caused by direct gap emission with both neutral and charged ...
Luminescent and optical spectroscopy of ZnO crystals obtained by new method based on the halide vapor transport

COLIBABA, G. V.; SHTEPLIUK, I. I.; GONCEARENCO, E. P.; INCULET, I. (Technical University of Moldova, 2015)

The photoluminescence (PL), transmittance and IR reflectance spectra were investigated for ZnO single crystals grown by the HCl chemical vapor transport technique. Electrical parameters were also calculated from the Hall ...
Metal oxide nanowires for photodetectors and light emitting diodes

LUPAN, Oleg (Technical University of Moldova, 2015)

In this presentation will be overviewed various nano- and microscale device structures made on a single metal oxide nanowire (ZnO, SnO2, CuO, etc.), as well as the use of their arrays. Nanowires were grown by several ...
Modeling of the structural transition in the nanostructured tetrathiotetracene-iodide crystal

ANDRONIC, Silvia (Technical University of Moldova, 2015)

The Peierls structural transition in quasi-one-dimensional (Q1D) organic crystals of tetrathiotetracene iodide (TTT2I3) is presented in the 1D and 2D physical model. For a more complete description of the crystal, two the ...

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