Now showing items 1-4 of 4

    • Low loss optical waveguides and polarization splitters with oxidized AlxGa1-xAs layers 

      Bek, Alpan (Bilkent University, 1998)
      Low propagation loss waveguides, operating at 1.55 fim optical wavelength, are fabricated utilizing oxidized AhGai_a;As layers. MBE grown multilayer semiconductor heterostructures are characterized before and after ...
    • Microcavity effects in the photoluminescence of hydrogenated amorphous silicon nitride 

      Serpengüzel, Ali; Aydınlı, Atilla; Bek, Alpan (SPIE, 1998)
      Fabry-Perot microcavities are used for the alteration of photoluminescence in hydrogenated amorphous silicon nitride grown with and without ammonia. The photoluminescence is red-near-infrared for the samples grown without ...
    • Microcavity enhanced amorphous silicon photoluminescence 

      Serpengüzel, Ali; Aydınlı, Atilla; Bek, Alpan (IEEE, 1997)
      A microcavity enhancement of room temperature photoluminescence (PL) of a hydrogenated amorphous silicon (a-Si:h) was performed. A quantum confinement model was developed to describe the occurrence of the PL in the bulk ...
    • The operation of a novel hot electron vertical cavity surface emitting laser 

      Balkan, N.; O'Brien-Davies, A.; Thoms, A. B.; Potter, R. J.; Poolton, N.; Adams, M. J.; Masum, J.; Bek, Alpan; Serpengüzel, Ali; Aydınlı, Atilla; Roberts, J. S. (SPIE, 1998)
      The hot Electron Light Emission and Lasing in Semiconductor Heterostructures devices (HELLISH-1) is novel surface emitter consisting of a GaAs quantum well, within the depletion region, on the n side of Ga 1-xAlxAs p- n ...