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Browsing by Subject "Light transmission"

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    • Conference Object  

      Capacity of Binary State Symmetric Channel with and without feedback and transmission cost 

      Kourtellaris, C. K.; Charalambous, Charalambos D. (Institute of Electrical and Electronics Engineers Inc., 2015)
      We consider a unit memory channel, called Binary State Symmetric Channel (BSSC), in which the channel state is the modulo2 addition of the current channel input and the previous channel output. We derive closed form ...

    • Article  

      Carrier relaxation dynamics in SnxNy nanowires grown by chemical vapor deposition 

      Othonos, A.; Zervos, Matthew (2009)
      Carrier relaxation dynamics in tin nitride (SnxNy) nanowires have been investigated using femtosecond transient absorption spectroscopy. The nanowires were grown directly on quartz using chemical vapor deposition and had ...

    • Article  

      Carrier relaxation dynamics in SnxNy nanowires grown by chemical vapor deposition 

      Othonos, Andreas S.; Zervos, Matthew (2009)
      Carrier relaxation dynamics in tin nitride (SnxNy) nanowires have been investigated using femtosecond transient absorption spectroscopy. The nanowires were grown directly on quartz using chemical vapor deposition and had ...

    • Article  

      High yield-low temperature growth of indium sulphide nanowires via chemical vapor deposition 

      Zervos, Matthew; Papageorgiou, Polina; Othonos, Andreas S. (2010)
      Indium sulphide nanowires (NWs) have been grown on Si via the reaction of In and InCl3 with H2S using chemical vapor deposition at temperatures as low as 250 °C. We find that the growth of InxSy NWs via the direct reaction ...

    • Article  

      High yield-low temperature growth of indium sulphide nanowires via chemical vapor deposition 

      Zervos, Matthew; Papageorgiou, P.; Othonos, A. (2010)
      Indium sulphide nanowires (NWs) have been grown on Si via the reaction of In and InCl3 with H2S using chemical vapor deposition at temperatures as low as 250 °C. We find that the growth of InxSy NWs via the direct reaction ...

    • Article  

      High-resolution quadrature photopyroelectric spectroscopy of a-Si:H thin films deposited on silicon wafers 

      Shen, Jun; Mandelis, Andreas; Othonos, Andreas S.; Vanniasinkam, Joseph (1995)
      The recently developed photothermal technique of quadrature photopyroelectric spectroscopy (Q-PPES) has been applied to measurements of amorphous Si thin films deposited on crystalline Si substrates. Direct, meaningful ...

    • Conference Object  

      Nonanticipative transmission for sources and channels with memory 

      Kourtellaris, C. K.; Charalambous, Charalambos D.; Boutros, J. J. (Institute of Electrical and Electronics Engineers Inc., 2015)
      In this paper we analyze nonanticipative (delayless) transmission of source symbols with memory over channels with memory (with and without feedback). We employ duality of source, channel pairs with respect to distortion ...

    • Article  

      Phase shifted Bragg gratings formed in optical fibres by post-fabrication thermal processing 

      Uttamchandani, D.; Othonos, Andreas S. (1996)
      Fibre Bragg gratings have been post-fabrication processed using localised heat treatment, with significant changes to their transmission and reflection characteristics being observed. Experimental results of the spectral ...

    • Conference Object  

      The Radiosity Diffusion model in 3D 

      Riley, J. D.; Arridge, S. R.; Chrysanthou, Yiorgos L.; Dehghani, H.; Hillman, E. M. C.; Schweiger, M. (2001)
      We present the Radiosity-Diffusion model in three dimensions (3D), as an extension to previous work in 2D. It is a method for handling non-scattering spaces in optically participating media. We present the extension of the ...

    • Article  

      Reversible hydrogels from amphiphilic polyelectrolyte model multiblock copolymers: The importance of macromolecular topology 

      Popescu, M. -T; Athanasoulias, I.; Tsitsilianis, C.; Hadjiantoniou, Natalie A.; Patrickios, Costas S. (2010)
      The association ability of model amphiphilic polyelectrolytes with multi-block architecture, i.e. ABA, BABAB, ABABABA and BABABABAB (A hydrophobic, B polyelectrolyte block) was studied in aqueous media. The gelation ...

    • Conference Object  

      Study of optical fiber structures using atomic force microscopy and scanning near-field optical microscopy 

      Tsai, Din Ping; Chung, Yueh L.; Othonos, Andreas S. (1996)
      Atomic force microscopy (AFM) and scanning near-field optical microscopy (SNOM) were used to study optical fiber structures. The refractive index profile of fiber was disclosed by surface topography of etched fiber endface ...

    • Article  

      Ultrafast time-resolved spectroscopy of ZnSe nanowires: Carrier dynamics of defect-related states 

      Othonos, Andreas S.; Lioudakis, Emmanouil E.; Tsokkou, Demetra; Philipose, U.; Ruda, H. E. (2009)
      In recent years, ZnSe nanowires have been widely investigated for their potential applications in optoelectronics. A typical room temperature photoluminescence spectrum of ZnSe nanowires grown by vapor-liquid-solid growth ...

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