Now showing items 1-13 of 13

    • A Comparative Passivation Study for InAs / GaSb Pin Superlattice Photodetectors 

      Salihoglu, O.; Muti, A.; Aydınlı, Atilla (IEEE Institute of Electrical and Electronics Engineers, 2013-08)
      In the quest to find ever better passivation techniques for infrared photodetectors, we explore several passivation layers using atomic layer deposition (ALD). We compare the impact of these layers on detectors fabricated ...
    • Crystallization of Ge in SiO2 matrix by femtosecond laser processing 

      Salihoglu, O.; Kürüm, U.; Yaglioglu, H. G.; Elmali, A.; Aydınlı, Atilla (American Vacuum Society, 2012-01-19)
      Germanium nanocrystals embedded in a siliconoxide matrix has been fabricated by single femtosecond laser pulse irradiation of germanium doped SiO2 thin films deposited with plasma enhanced chemical vapor deposition. SEM ...
    • Electronic and optical properties of 4.2 lm‘‘N’’ structured superlattice MWIR photodetectors 

      Salihoglu, O.; Hostut M.; Tansel, T.; Kutluer, K.; Kilic A.; Alyoruk, M.; Sevik, C.; Turan, R.; Ergun, Y.; Aydınlı, Atilla (Elsevier B.V., 2013-01-05)
      We report on the development of a new structure for type II superlattice photodiodes that we call the ‘‘N’’ design. In this new design, we insert an electron barrier between InAs and GaSb in the growth direction. The ...
    • Electronic and optical properties of 4.2 μm"N" structured superlattice MWIR photodetectors 

      Salihoglu, O.; Hostut M.; Tansel, T.; Kutluer, K.; Kilic A.; Alyoruk, M.; Sevik, C.; Turan, R.; Ergun, Y.; Aydınlı, Atilla (Elsevier, 2013)
      We report on the development of a new structure for type II superlattice photodiodes that we call the "N" design. In this new design, we insert an electron barrier between InAs and GaSb in the growth direction. The barrier ...
    • Femtosecond laser crystallization of amorphous Ge 

      Salihoglu, O.; Kürüm, U.; Yaglıoglu, G. H.; Elmali, A.; Aydınlı, Atilla (American Institute of Physics, 2011)
      Ultrafast crystallization of amorphous germanium (a-Ge) in ambient has been studied. Plasma enhanced chemical vapor deposition grown a-Ge was irradiated with single femtosecond laser pulses of various durations with a range ...
    • Graphene as a Reversible and Spectrally Selective Fluorescence Quencher 

      Salihoglu, O.; Kakenov, N.; Balci, O.; Balci, S.; Kocabas, C. (Nature Publishing Group, 2016)
      We report reversible and spectrally selective fluorescence quenching of quantum dots (QDs) placed in close proximity to graphene. Controlling interband electronic transitions of graphene via electrostatic gating greatly ...
    • Graphene-quantum dot hybrid optoelectronics at visible wavelengths 

      Salihoglu, O.; Kakenov, N.; Balci, O.; Balci, S.; Kocabas, C. (American Chemical Society, 2018)
      With exceptional electronic and gate-tunable optical properties, graphene provides new possibilities for active nanophotonic devices. Requirements of very large carrier density modulation, however, limit the operation of ...
    • N structure for type-II superlattice photodetectors 

      Salihoglu, O.; Muti, A.; Kutluer, K.; Tansel, T.; Turan, R.; Ergun, Y.; Aydınlı, Atilla (American Institute of Physics, 2012-08-14)
      In the quest to raise the operating temperature and improve the detectivity of type II superlattice (T2SL) photodetectors, we introduce a design approach that we call the "N structure." N structure aims to improve absorption ...
    • Plasmon-polaritons on graphene-metal surface and their use in biosensors 

      Salihoglu, O.; Balci, S.; Kocabas, C. (A I P Publishing LLC, 2012)
      We studied excitation of surface plasmon-polaritons on graphene-metal surface. The metal surface is functionalized by transfer printing of graphene grown by chemical vapor deposition on copper foils. Surface plasmon resonance ...
    • Skin-like self-assembled monolayers on InAs / GaSb superlattice photodetectors 

      Salihoglu, O.; Muti, A.; Kutluer, K.; Tansel, T.; Turan, R.; Aydınlı, Atilla (IOP Institute of Physics Publishing, 2012)
      We report on the effects of monolayer (ML) thick skin-like octadecanethiol (ODT, CH 3[CH 2] 17SH) on type-II InAs/GaSb MWIR photodetectors. Circumventing the ageing effects of conventional sulfur compounds, we use ODT, a ...
    • Synthesis of graphene on gold 

      Oznuluer, T.; Pince, E.; Polat, E. O.; Balci, O.; Salihoglu, O.; Kocabas, C. (A I P Publishing, 2011)
      Here we report chemical vapor deposition of graphene on gold surface at ambient pressure. We studied effects of the growth temperature, pressure, and cooling process on the grown graphene layers. The Raman spectroscopy of ...
    • Tuning surface plasmon-exciton coupling via thickness dependent plasmon damping 

      Balci, S.; Kocabas, C.; Ates, S.; Karademir, E.; Salihoglu, O.; Aydınlı, Atilla (American Physical Society, 2012)
      In this paper, we report experimental and theoretical investigations on tuning of the surface plasmon-exciton coupling by controlling the plasmonic mode damping, which is defined by the plasmonic layer thickness. The results ...
    • Weighing graphene with QCM to monitor interfacial mass changes 

      Kakenov, N.; Balci, O.; Salihoglu, O.; Hur, S. H.; Balci, S.; Kocabas, C. (American Institute of Physics Inc., 2016)
      In this Letter, we experimentally determined the mass density of graphene using quartz crystal microbalance (QCM) as a mechanical resonator. We developed a transfer printing technique to integrate large area single-layer ...