dc.contributor.advisor | Ozbay, Ekmel | |
dc.contributor.author | Temelkuran, Burak | |
dc.date.accessioned | 2016-01-08T20:20:38Z | |
dc.date.available | 2016-01-08T20:20:38Z | |
dc.date.issued | 2000 | |
dc.identifier.uri | http://hdl.handle.net/11693/18584 | |
dc.description | Ankara : Department of Physics and the Institute of Engineering and Science of Bilkent Univ., 2000. | en_US |
dc.description | Thesis (Ph.D.) -- Bilkent University, 2000. | en_US |
dc.description | Includes bibliographical references leaves 72-79 | en_US |
dc.description.abstract | We first fabricated a dielectric based layer-by-layer photonic crystal, with a
three-dimensional photonic band gap at microwave frequencies. We investigated the
transmission, reflection and defect characteristics of the crystal. A Fabry-Perot cavity
analogy was used to understand the localization of the electromagnetic (EM) fields
around defects. We then showed the enhancement of the EM held within the defect
volumes, and suggested a possible application: resonant cavity enhanced detectors built
around photonic crystals. We demonstrated that a detector inserted inside the defect
volume benefits from the frequency selectivity and the highly enhanced field of the cavity.
Next, we investigated the radiation of the EM fields from a source inserted in the defect
volume, and observed that the radiated field has a very high directivity and efficiency.
The experimental results agreed well with the theoretical expectations.
We demonstrated waveguiding structures built around photonic crystals. We showed
that EM waves could be guided through a planar air gap between two photonic crystals,
in which the wave is coupled inside the defect volume, and having no where else to go,
propagates through this opening. The dispersion diagrams for these planar waveguide
structures also agreed well with the theoretical expectations of our waveguide model. We
also showed that, the wave could be guided along a single missing rod, and demonstrated
the bending of the EM waves for these waveguide structures with “L” shaped openings. We tested metallic photonic crystals built in different dimensions and diflferent
filling ratios. We observed many superiorities of these structures when compared to
dielectric-based photonic crystals. A full characterisation of various metallic photonic
crystals was performed. We also showed that metallic photonic crystals are suitable
for some of the applications we have demonstrated for dielectric structures. We
also fabricated a new layer-by-layer photonic crystal using highly doped silicon wafers
processed by semiconductor micromachining techniques, with a band gap at millimeter
wave frequencies. We showed that the transmission and defect characteristics of these
structures are analogous to metallic photonic crystals, as we have predicted. The
experimental results agree well with the predictions of the transfer matrix method
(TMM) simulations. The method can be extended to fabricate these crystals at THz.
frequencies. | en_US |
dc.description.statementofresponsibility | Temelkuran, Burak | en_US |
dc.format.extent | ii, 79 leaves | en_US |
dc.language.iso | English | en_US |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Photonic Crystal | en_US |
dc.subject | Photonic Band Gap (PBG) | en_US |
dc.subject | Defect | en_US |
dc.subject | FabryPerot
Cavity | en_US |
dc.subject | Resonant Cavity Enhancement | en_US |
dc.subject | EM Field
Radiation | en_US |
dc.subject | Directivity | en_US |
dc.subject | Waveguide | en_US |
dc.subject | Transfer Matrix Method
(TMM) | en_US |
dc.subject | Doping | en_US |
dc.subject | Semiconductor Micromachining | en_US |
dc.subject.lcc | QC793.5.P427 T46 2000 | en_US |
dc.subject.lcsh | Photons. | en_US |
dc.subject.lcsh | Crystals optics. | en_US |
dc.title | Physics and applications of photonic crystals | en_US |
dc.type | Thesis | en_US |
dc.department | Department of Physics | en_US |
dc.publisher | Bilkent University | en_US |
dc.description.degree | Ph.D. | en_US |