Advisors

Now showing items 1-20 of 23

    • Al(x)Ga(1-x)As/GaAs graded index separate confinement heterostructure single quantum well lasers 

      Bozkurt, Mümtaz Koray (Bilkent University, 1994)
      "Stimulated emission of photons could be produced in semiconductors by recombination of carriers injected across a p-n junction This idea was first suggested by Basov et al} in 1961. Soon afterwards diode lasers were ...

    • Fabrication, characterization and simulation of plasmonic cavities 

      Karabıyık, Mustafa (Bilkent University, 2010)
      Surface plasmon polaritons (SPPs) originate from the collective oscillations of conduction electrons coupled with photons propagating at metal-dielectric interfaces. A uniform metallic gratings change the dispersion ...

    • Formation of Ge nanocrystals with CW laser irradiation of Siox:Ge thin films 

      Gümüş, Melike (Bilkent University, 2015)
      Germanium and silicon are the materials which have effective absorption in the visible and near infrared region of electromagnetic spectrum; therefore they are preferred for optoelectronic device and solar cell applications. ...

    • Formation of silicon nanocrystals by laser processing of silicon rich oxides 

      Gündoğdu, Sinan (Bilkent University, 2012)
      Silicon nanocrystals are well known to exhibit strong luminescence in the visible. Extension of this into a nanocrystal network would be beneficial for many applications. In the light of recent advances on exciton-plasmon ...

    • GaAs/AlGaAs polarization splitting directional couplers 

      Yurt, Nasuhi (Bilkent University, 1997)
      Directional couplers are building blocks for m any guided wave devices in integrated optics and optoelectronics. They have been used as switches, modulators, wavelength filters, power dividers, wavelength m ultiplexer-dem ...

    • Gain measurements via spontaneous emission in quantum well semiconductor lasers 

      Azfar, Talal (Bilkent University, 1996)
      111 this work ail analysis of gain in single c|iianliini well last'rs as a riinction of sonu' of llu'ir o|)(M’alioiial paranu'l('rs is earrii'd oiil. I^'irsl, a 1 li('or('liea.l inodi'l of gain is |)resent('d. 'riuMi two ...

    • Germanium alloys for optoelectronic devices 

      Erbil, Ayşe (Bilkent University, 2008)
      Silicon has been the backbone of the mainstream electronics of the last fifty years. It is however, used in conjunction with other matierals, mainly with its oxides and nitrides. Germanium, on the other hand, is also a ...

    • Grating based plasmonic cavities 

      Şenlik, Servet Seçkin (Bilkent University, 2009)
      Surface plasmon polaritons are dipole carrying electromagnetic excitations occur- ing at metal-dielectric interfaces. Metallic periodic structures exhibit modi¯ed transmission and re°ection spectra owing to the interaction ...

    • Grating loaded integrated optical cantilevers 

      Karademir, Ertuğrul (Bilkent University, 2010)
      Cantilever beams are the most important parts of standard scanning probe microscopy. In this work, an integrated optical approach to sense the deflection of a cantilever beam is suggested and realized. A grating coupler ...

    • Impurity-free quantum well intermixing for high-power laser diodes 

      Kahraman, Abdullah (Bilkent University, 2015-08)
      The demand for ever higher powers and efficiencies from semiconductor lasers, continues. State-of-the-art high power lasers require not only sophisticated designs but also complex fabrication technologies to push the ...

    • Integrated optical displacement sensors for scanning force microscopies 

      Kocabaş, Coşkun (Bilkent University, 2003)
      In this thesis, we have studied the use of integrated optical waveguide devices acting as integrated displacement sensors on cantilevers for scanning probe microscopes. These displacement sensors include integrated optical ...

    • Light matter interaction in plexcitonic crystals and moiré cavities 

      Karademir, Ertuğrul (Bilkent University, 2015-01)
      Surface plasmon polaritons (SPPs) are quanta of electromagnetic excitations at the interface between metal and dielectric media. SPPs with an evanescent tail in the perpendicular direction, thus their properties are ...

    • Low dimensional structures for optical and electrical applications 

      Akça, İmran (Bilkent University, 2008)
      Low dimensional structures such as quantum dots have been particularly attractive because of their fundamental physical properties and their potential applications in various devices in integrated optics and microelectronics. ...

    • 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 ...

    • Monolithic and hybrid silicon-on-insulator integrated optical devices 

      Kiyat, İsa (Bilkent University, 2005)
      Silicon, the basic material of electronics industry is rediscovered nowadays for its potential use in photonics and integrated optics. The research activity in silicon integrated optics have been speeding up during the ...

    • Passivation of InSb infrared photodetectors 

      Yumrukçu, Samed (Bilkent University, 2010)
      Infrared detectors have wide range applications in both military and civilian life. One of the most commonly used infrared detectors is InSb detectors. InSb detector technology has been developing since 1950s. Fabricating ...

    • Plasmonic band gap cavities 

      Kocabaş, Aşkın (Bilkent University, 2008)
      Surface plasmon polaritons (SPP’s) are trapped electromagnetic waves coupled to free electrons in metals that propagate at the metal-dielectric interfaces. Due to their surface confinement and potential in sub-wavelength ...

    • Plasmonic nanoparticles by laser dewetting of thin metallic films 

      Sarıtaş, Seval (Bilkent University, 2013)
      In this work, formation of metal nanoparticles via laser induced dewetting and their plasmonic properties have been investigated. The effects of metal film, substrate type, laser power density and dwell time on dewetting ...

    • Polarization independent thermo-optic modulators for integrated optics 

      Kocabaş, Aşkın (Bilkent University, 2003)
      In this work, we studied MMI and Y-junction based Mach-Zehnder modulators on both silicon-on-insulator and polymer based on thermo-optic effect. Both Pπ values and frequency response of the devices were measured and ...

    • Ridge waveguide GaAS 

      Türkoğlu, Abdullah Kamuran (Bilkent University, 1994)
      The study of solid-state laser structures in low dimensions has gained great deal of attention in recent years. The theory originated in early 1960s developed really fast along with new fabrication methods bringing ...