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Browsing Science and Society- the Use of Light by Issue Date

Browsing Science and Society- the Use of Light by Issue Date

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  • 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 ...
  • 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, ...
  • 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 ...
  • 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 ...
  • Random lasers: 30 years of development 
    URSAKI, V. V. (Universitatea Tehnică a Moldovei, 2015)
    In this report an overview of random lasers development is presented staring from the first theoretical prediction of random laser action by Letokhov about 50 years ago and the first experimental demonstration by Markushev ...
  • TiO2 nanotubular structures, synthesis and different applications 
    ENACHI, Mihai (Technical University of Moldova, 2015)
    TiO2 nanotubular structures NTs are promising materials for gas sensing, optoelectronic and photonic applications. One of the key points in these applications is the possibility to control the morphology, dimensions of ...
  • 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 ...
  • 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 ...
  • Theory of Catalytic Micro- and Nanoengines: From Self-Propulsion Mechanisms to Remediation of Polluted Water 
    FOMIN, V. (Technical University of Moldova, 2015)
    A review is given of the theoretical ideas concerning the propulsion mechanisms of the catalytic micro- and nanoengines, which are prospective in robotics, biomedical engineering and environmental sustainability. Enhanced ...
  • Spintronics and optoelectronics - the light makes them closer 
    SIDORENKO, Anatolie (Technical University of Moldova, 2015)
    Last decade very rapid development became a new direction of the microelectronics of 21st century – spintronics, or spin-dependent electronics. It is similar to the extremely rapid development of the optoelectronics in ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 – ...
  • New take-off of Gallium Nitride 
    TIGINYANU, Ion (Technical University of Moldova, 2015)
    Gallium Nitride (GaN) is a wide-band-gap semiconductor compound (Eg = 3.4 eV at 300 K) which over the last decades played a major role in the development of modern solid-state lighting industry. An intensive investigation ...
  • 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 ...
  • Synchronization of chaos of quantum dots lasers under the influence of external cavity optical feedback 
    SANDUȚA; OLOINIC, T.; RUSU, S. S.; TRONCIU, V. Z. (Technical University of Moldova, 2015)
    We report the numerical results on the investigation of the dynamical behavior of a semiconductor laser with quantum dots active medium and a feedback from double cavity. Due to the influence of the external feedback, under ...
  • Alternative technology for artificial stimulation of the motility of the gastrointestinal tract 
    POPA, V.; HOTINEANU, V.; SCORPAN, A.; CAZAC, A.; BRANISTE, T.; TIGINYANU, I. (Universitatea Tehnică a Moldovei, 2015)
    In most of the situations the direct electrical stimulation via electrodes of the gastrointestinal tract is not acceptable. An alternative remote method was developed by implantation of high concentration of piezoelectric ...

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