Now showing items 1-8 of 8

    • Asymptotic wave-like modeling of dielectric lenses 

      Yurchenko, V. B.; Altıntaş, Ayhan (IEEE, 2007)
      We propose asymptotic wave-like approximations for the accurate modeling of dielectric lenses used in quasi-optical systems of millimeter, submillimeter, and infrared wave applications. For the comparison, we obtain an ...
    • A Comparative Passivation Study for InAs / GaSb Pin Superlattice Photodetectors 

      Salihoglu, O.; Muti, A.; Aydinli, A. (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 ...
    • Compressive sensing based flame detection in infrared videos 

      Günay, Osman; Çetin, A. Enis (IEEE, 2013)
      In this paper, a Compressive Sensing based feature extraction algorithm is proposed for flame detection using infrared cameras. First, bright and moving regions in videos are detected. Then the videos are divided into ...
    • Cooperative localization in hybrid infrared/visible light networks: theoretical limits and distributed algorithms 

      Keskin, F.; Erdem, O.; Gezici, S. (Institute of Electrical and Electronics Engineers, 2018)
      Light emitting diode (LED) based visible light positioning (VLP) networks can provide accurate location information in environments where the global positioning system (GPS) suffers from severe signal degradation and/or ...
    • High-conductivity silicon based spectrally selective plasmonic surfaces for sensing in the infrared region 

      Gorgulu, K.; Gok, A.; Yilmaz, M.; Topalli K.; Okyay, A., K. (Institute of Physics Publishing, 2017)
      Plasmonic perfect absorbers have found a wide range of applications in imaging, sensing, and light harvesting and emitting devices. Traditionally, metals are used to implement plasmonic structures. For sensing applications, ...
    • High-Speed InSb photodetectors on GaAs for mid-IR applications 

      Kimukin, I.; Biyikli, N.; Kartaloǧlu, T.; Aytür, O.; Özbay, Ekmel (IEEE, 2004)
      We report p-i-n type InSb-based high-speed photodetectors grown on GaAs substrate. Electrical and optical properties of photodetectors with active areas ranging from 7.06 × 10 -6 cm 2 to 2.25 × 10 -4 cm 2 measured at 77 K ...
    • The spontaneous hemin release form Lumbricus terrestris hemoglobin 

      Smith, M.L.; Paul J.; Ohlsson P.I.; Paul, K.G. (1997)
      The slow, spontaneous release of hemin from earthworm, Lumbricus terrestris, hemoglobin has been studied under mild conditions in the presence of excess apomyoglobin. This important protein is surprisingly unstable. The ...
    • Video processing algorithms for wildfire surveillance 

      Günay, Osman (Bilkent University, 2015-05)
      We propose various image and video processing algorithms for wild re surveillance. The proposed methods include; classi er fusion, online learning, real-time feature extraction, image registration and optimization. We ...