Now showing items 1-11 of 11

    • Characterization of multilayer self-organized InAs quantum dot embedded waveguides at 1.3 and 1.5 μm 

      Akca, B. Imran; Dana, Aykutlu; Aydınlı, Atilla; Rossetti, M.; Li L.; Fiore, A.; Dagli, N. (IEEE, 2007)
      In this paper, we characterized the electro-optic coefficient and loss of multilayer InAs quantum dot laser structures at 1309 and 1515 nm. Quantum dot waveguides were grown by molecular beam epitaxy, where the active ...
    • A Compact Silicon-on-insulator Polarization Splitter 

      Kiyat, I.; Aydınlı, Atilla; Dagli, N. (IEEE, 2005)
      A compact directional coupler-based polarization splitter is designed and realized using silicon-on-insulator (SOI) waveguides. Even though silicon does not have any material birefringence, the high index contrast obtained ...
    • Electric field dependence of modulation in multilayer InAs quantum dot waveguides 

      Akça, Imran B.; Dana, Aykutlu; Aydınlı, Atilla; Rossetti, M.; Li, A.; Fiore, A.; Dagli, N. (IEEE, 2007)
      The low voltage modulation in InAs quantum dot waveguides is observed in this paper. We have measured the electro-optic coefficient in multilayer quantum dot structures far away from resonance and obtained an enhancement ...
    • Filtering characteristics of hybrid integrated polymer and compound semiconductor waveguides 

      Ozturk, C.; Huntington, A.; Aydınlı, Atilla; Byun, Y.T.; Dagli, N. (IEEE, 2002)
      This paper reports a study on a compact filter fabricated using hybrid integration of compound semiconductors and polymers. A GaAs epilayer is glued onto a polymer channel waveguide forming a highly asymmetrical directional ...
    • High-Q silicon-on-insulator optical rib waveguide racetrack resonators 

      Kiyat I.; Aydınlı, Atilla; Dagli, N. (Optical Society of American (OSA), 2005)
      In this work, detailed design and realization of high quality factor (Q) racetrack resonators based on silicon-on-insulator rib waveguides are presented. Aiming to achieve critical coupling, suitable waveguide geometry is ...
    • Linear electro-optic coefficient in multilayer self-organized InAs quantum dot structures 

      Akca, B. Imran; Dana, Aykutlu; Aydınlı, Atilla; Rossetti, M.; Li L.; Dagli, N.; Fiore, A. (IEEE, 2007)
      The electro-optic coefficients of self-organized InAs quantum dot layers in molecular beam epitaxy grown laser structures in reverse bias have been investigated. Enhanced electrooptic coefficients compared to bulk GaAs ...
    • Low-power thermooptical tuning of SOI resonator switch 

      Kiyat, I.; Aydınlı, Atilla; Dagli, N. (IEEE, 2006)
      A wavelength selective optical switch is developed based on a high-Q racetrack resonator making use of the large thermooptic coefficient of silicon. The racetrack resonator was fabricated using a silicon-on-insulator (SOI) ...
    • Modulation in InAs quantum dot waveguides 

      Akca, B. Imran; Dana, Aykutlu; Aydınlı, Atilla; Rossetti, M.; Li L.; Fiore, A.; Dagli, N. (Optical Society of America, 2007)
      Modulation in molecular beam epitaxy grown self-assembled InAs quantum dot waveguides have been studied at 1500 nm as a function of wavelength and voltage. Enhanced electro-optic coefficients compared to bulk GaAs were ...
    • Modulation of multilayer InAs quantum dot waveguides under applied electric field 

      Akça, Imran B.; Dana, Aykutlu; Aydınlı, Atilla; Rossetti, M.; Li L.; Fiore, A.; Dagli, N. (Optical Society of America, 2007)
      Electric field dependence of optical modulation in self assembled InAs quantum dot waveguides have been studied at 1300 and 1500 nm. Electro-absorption and electro-optic coefficients of these waveguides have been obtained ...
    • Polarization characteristics of compact SOI rib waveguide racetrack resonators 

      Kiyat, I.; Aydınlı, Atilla; Dagli, N. (IEEE, 2005)
      We report on the development of compact optical racetrack resonators on silicon-on-insulator (SOI) rib waveguides. We make use of large-cross-section waveguides instead of photonic wire waveguides. We fabricated resonators ...
    • Study of wet oxidized AlxGa1-xAs for integrated optics 

      Bek, A.; Aydınlı, Atilla; Champlain, J. G.; Naone, R.; Dagli, N. (Institute of Electrical and Electronics Engineers, 1999)
      An investigation of wet oxidized AlxGa1-xAs layers in integrated optical applications is reported. Refractive index and thickness shrinkage of wet oxidized AlxGa1-xAs layers are measured using spectroscopic ellipsometry. ...