Browsing by Author "Balci, S."

Now showing items 1-20 of 20

    • Absorption enhancement of molecules in the weak plasmon-exciton coupling regime 

      Balci, S.; Karademir, E.; Kocabas, C.; Aydınlı, Atilla (Optical Society of American (OSA), 2014)
      We report on the experimental and theoretical investigations of enhancing the optical absorption of organic molecules in the weak plasmon-exciton coupling regime. A metal-organic hybrid structure consisting of dye molecules ...

    • Critical coupling in plasmonic resonator arrays 

      Balci, S.; Kocabas, C.; Aydınlı, Atilla (Optical Society of America, 2011)
      We report critical coupling of electromagnetic waves to plasmonic cavity arrays fabricated on Moire surfaces. Dark field plasmon microscopy imaging and polarization dependent spectroscopic reflection measurements reveal ...

    • Dynamic tuning of plasmon resonance in the visible using graphene 

      Balci, S.; Balci, O.; Kakenov, N.; Atar, F. B.; Kocabas, C. (The Optical Society, 2016)
      We report active electrical tuning of plasmon resonance of silver nanoprisms (Ag NPs) in the visible spectrum. Ag NPs are placed in close proximity to graphene which leads to additional tunable loss for the plasmon resonance. ...

    • Electroless synthesis of 3nm wide alloy nanowires inside Tobacco mosaic virus 

      Balci, S.; Hahn, K.; Kopold P.; Kadri, A.; Wege, C.; Kern, K.; Bittner, A.M. (2012)
      We show that 3nm wide cobaltiron alloy nanowires can be synthesized by simple wet chemical electroless deposition inside tubular Tobacco mosaic virus particles. The method is based on adsorption of Pd(II) ions, formation ...

    • 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-Based Adaptive Thermal Camouflage 

      Salihoğlu, Ömer; Uzlu, H. B.; Yakar, Ozan; Aas, Shahnaz; Balci, Osman; Kakenov, Nurbek; Balci, S.; Olcum, S.; Süzer, Şefik; Kocabas, Coşkun (American Chemical Society, 2018)
      In nature, adaptive coloration has been effectively utilized for concealment and signaling. Various biological mechanisms have evolved to tune the reflectivity for visible and ultraviolet light. These examples inspire many ...

    • 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 ...

    • Lasing in a Slow Plasmon Moiré Cavity 

      Karademir, E.; Balci, S.; Kocabas, C.; Aydınlı, Atilla (American Chemical Society, 2015)
      We report on lasing from dye-based excitons coupled to slow plasmon states inside metallic Moiré cavities. Surface plasmon polaritons (SPPs) inside the cavity were slowed down to a maximum group velocity of 0.3c. Varying ...

    • Lyotropic liquid-crystalline mesophase of lithium triflate-nonionic surfactant as gel electrolyte for graphene optical modulator 

      Balci, F. M.; Balci, S.; Kocabas, C.; Dag, Ö. (American Chemical Society, 2017)
      Lithium salt (noncoordinating anions, such as lithium triflate (Ltf)) gel electrolytes may be key for the practical use of electrochemical devices. We introduce a new lyotropic liquid-crystalline (LLC) mesophase using Ltf, ...

    • Photosensitization of PVC dehydrochlorination by hydroquinone for improved optical and electrical properties 

      Balci, S.; Birer, O.; Süzer, Şefik (Elsevier, 2004)
      Hydroquinone (HQ) is incorporated into the PVC films containing methyl violet or polyaniline (emeraldine base) for sensitizing the UV induced optical or electrical changes, respectively. It is observed that introduction ...

    • 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 ...

    • Plasmonic band gap engineering of plasmon-exciton coupling 

      Karademir, E.; Balci, S.; Kocabas, C.; Aydınlı, Atilla (Optical Society of American (OSA), 2014)
      Controlling plasmon-exciton coupling through band gap engineering of plasmonic crystals is demonstrated in the Kretschmann configuration. When the flat metal surface is textured with a sinusoidal grating only in one ...

    • Plexcitonic crystals: A tunable platform for light-matter interactions 

      Karademir, E.; Balci, S.; Kocabas, C.; Aydınlı, Atilla (Optical Society of American (OSA), 2014)
      Coupled states of surface plasmon polaritons (SPPs) and excitons are collectively called plexcitons [Nano Lett. 8, 3481 (2008)]. Plexcitonics is an emerging field of research aiming to control light-matter interaction at ...

    • Probing molecular interactions on carbon nanotube surfaces using surface plasmon resonance sensors 

      Kakenov, N.; Balci, O.; Balci, S.; Kocabas, C. (A I P Publishing LLC, 2012)
      In this work, we present a method to probe molecular interactions on single-walled carbon nanotube (SWNT) surfaces using a surface plasmon sensor. SWNT networks were synthesized by chemical vapor deposition and transfer-printed ...

    • Probing ultrafast energy transfer between excitons and plasmons in the ultrastrong coupling regime 

      Balci, S.; Kocabas, C.; Küçüköz, B.; Karatay, A.; Akhüseyin, E.; Yaglioglu, H. G.; Elmali, A. (American Institute of Physics Inc., 2014)
      We investigate ultrafast energy transfer between excitons and plasmons in ensembles of core-shell type nanoparticles consisting of metal core covered with a concentric thin J-aggregate (JA) shell. The high electric field ...

    • Strong coupling between localized and propagating plasmon polaritons 

      Balci, S.; Karademir, E.; Kocabas, C. (OSA - The Optical Society, 2015)
      We investigate plasmon-plasmon (PP) coupling in the strongly interacting regimes by using a tunable plasmonic platform consisting of triangular Ag nanoprisms placed nanometers away from Ag thin films. The nanoprisms are ...

    • Tunable plexcitonic nanoparticles: a model system for studying plasmon-exciton interaction from the weak to the ultrastrong coupling regime 

      Balci, S.; Kucukoz, B.; Balci, O.; Karatay, A.; Kocabas, C.; Yaglioglu, G. (American Chemical Society, 2016)
      Controlling the number of dye molecules on metallic nanoparticles, which in turn affects the magnitude of Rabi splitting energy, is crucial for obtaining hybrid metal core–organic shell nanoparticles with tunable optical ...

    • 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 ...

    • Ultra hybrid plasmonics: Strong coupling of plexcitons with plasmon polaritons 

      Balci, S.; Kocabas, C. (OSA - The Optical Society, 2015)
      We report a ternary-coupled plasmonic system consisting of excitons of J-aggregated dye, localized surface plasmon polaritons of Ag nanoparticles, and propagating surface plasmon polaritons of continuous Ag film. J-aggregate ...

    • 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 ...