Now showing items 1-4 of 4

    • Controlling phase of microwaves with active graphene surfaces 

      Balci O.; Kakenov N.; Kocabas C. (American Institute of Physics Inc., 2017)
      In this letter, we report a method to control the reflection phase of microwaves using electrically tunable graphene devices. The device consists of mutually gated large-area graphene layers placed at a quarter-wave distance ...
    • Enhanced tunability of V-shaped plasmonic structures using ionic liquid gating and graphene 

      Ozdemir, O.; Aygar, A. M.; Balci, O.; Kocabas, C.; Caglayan, H.; Özbay, Ekmel (Elsevier Ltd, 2016)
      Graphene is a strong candidate for active optoelectronic devices because of its electrostatically tunable optical response. Current substrate back-gating methods are unable to sustain high fields through graphene unless a ...
    • Graphene-enabled optoelectronics on paper 

      Polat, E. O.; Uzlu, H. B.; Balci, O.; Kakenov, N.; Kovalska, E.; Kocabas, C. (American Chemical Society, 2016-06)
      The realization of optoelectronic devices on paper has been an outstanding challenge due to the large surface roughness and incompatible nature of paper with optical materials. Here, we demonstrate a new class of optoelectronic ...
    • X-ray photoelectron spectroscopy for identification of morphological defects and disorders in graphene devices 

      Aydogan, P.; Polat, E. O.; Kocabas, C.; Suzer, S. (AIP Publishing, 2016)
      The progress in the development of graphene devices is promising, and they are now considered as an option for the current Si-based electronics. However, the structural defects in graphene may strongly influence the local ...