MARC details
| 000 -LEADER |
|---|
| fixed length control field |
04842nam a22004937i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
TR-AnTOB |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
|---|
| control field |
20230908000937.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
|---|
| fixed length control field |
171111b xxu||||e mmmm 00| 0 eng d |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloging agency |
TR-AnTOB |
| Transcribing agency |
TR-AnTOB |
| Language of cataloging |
eng |
| Description conventions |
rda |
| 041 0# - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
Türkçe |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) |
|---|
| Classification number |
TEZ TOBB FBE ELE YL’18 YAS |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Yasa, Utku Görkem |
| 9 (RLIN) |
120253 |
| 245 10 - TITLE STATEMENT |
|---|
| Title |
Düşük dereceli dönel simetriye sahip iki-boyutlu fotonik kristal yapılarının sağladığı optik fenomenler ve nanofotonik alanındaki uygulamaları / |
| Statement of responsibility, etc. |
Utku Görkem Yasa. |
| 264 #1 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
|---|
| Place of production, publication, distribution, manufacture |
Ankara : |
| Name of producer, publisher, distributor, manufacturer |
TOBB ETÜ Fen Bilimleri Enstitüsü, |
| Date of production, publication, distribution, manufacture, or copyright notice |
2018. |
| 300 ## - PHYSICAL DESCRIPTION |
|---|
| Extent |
xv, 76 pages : |
| Other physical details |
charts and colored illustrations ; |
| Dimensions |
29 cm |
| 336 ## - CONTENT TYPE |
|---|
| Source |
rdacontent |
| Content type term |
text |
| Content type code |
txt |
| 337 ## - MEDIA TYPE |
|---|
| Source |
rdamedia |
| Media type term |
unmediated |
| Media type code |
n |
| 338 ## - CARRIER TYPE |
|---|
| Source |
rdacarrier |
| Carrier type term |
volume |
| Carrier type code |
nc |
| 502 ## - DISSERTATION NOTE |
|---|
| Dissertation note |
Tez (Yüksek Lisans)--TOBB ETÜ Fen Bilimleri Enstitüsü Mart 2018 |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
Most of the two-dimensional photonic crystals that are studied in the literature are<br/>based on the high rotational symmetric unit cells consisting of circular dielectric rods<br/>or circular air-holes. Inclusion of additional dielectric elements or modifying the<br/>shapes of existing circular elements gives rise to a reduction on the rotational<br/>symmetry order of two-dimensional photonic crystals unit cells. Low rotational<br/>symmetric unit cells involve structural variety and pave the way for extraordinary<br/>optical properties.<br/>In this thesis, novel optical phenomena and photonic device designs, which are<br/>achieved by utilizing various dispersion properties of low rotational symmetric unit<br/>cells, were presented. The proposed concepts were investigated in both frequency<br/>and time domains by exploiting plane wave expansion and finite-difference timedomain<br/>methods, respectively.<br/>One of the studies is about the polarization beam splitters that use polarizationsensitive<br/>self-collimation phenomenon of photonic crystals consisting of C2<br/>symmetric air holes. The proposed polarization beam splitters were investigated with<br/>vii<br/>different unit cell configurations. In addition, presented devices are novel and have<br/>high polarization extinction ratios. The device, which<br/>has maximum polarization extinction ratios of 26 dB (TE) and 22 dB (TM) at =<br/>1550 nm. Operational bandwidth of the device was measured to be 59 nm.<br/>Another study is about the numerical and experimental analyses of anisotropic zerorefractive-<br/>index materials that were achieved by performing a rotational symmetry<br/>reduction on the unit cells of photonic crystals exhibiting Dirac-like cone dispersion.<br/>Accidental degeneracy of two Bloch modes in the Brillouin zone center of C2<br/>symmetric photonic crystals gives rise to the semi-Dirac cone dispersion. The<br/>proposed photonic crystals expose impedance-matched zero-refractive-index feature<br/>( eff 0, eff 0) for one propagation direction and impedance-unmatched zerorefractive-<br/>index behavior ( eff 0, eff<br/>effective medium approach was utilized to verify proposed material s properties. The<br/>advantages of photonic crystals exhibiting semi-Dirac cone dispersion over periodic<br/>structures showing Dirac-like cone dispersion were stated in both frequency and time<br/>domains for photonic applications. By using anisotropic behavior of the proposed<br/>photonic crystals, photonic designs such as beam deflectors, beam splitters, and<br/>focusing lenses were proposed.<br/>In the last study, controlling the guided modes of waveguides, which consist of C1<br/>symmetric unit cells, were investigated depending on the unit cell rotation. By<br/>controlling the geometrical properties of C1 symmetric unit cells lying along the airdefect,<br/>adjustable phase properties of guided electromagnetic waves were achieved.<br/>Using this property, Mach-Zehnder interferometers based photonic applications such<br/>as wavelength-selective transmission, gas sensing, and mode converters were<br/>investigated in frequency and time domains. |
| 650 00 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| 9 (RLIN) |
32546 |
| Topical term or geographic name entry element |
Tezler, Akademik |
|
|---|
| Topical term or geographic name entry element |
Dissertations, Academic |
| 9 (RLIN) |
32543 |
| 653 ## - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
Fotonik kristaller |
|
|---|
| Uncontrolled term |
Dönel simetri |
|
|---|
| Uncontrolled term |
Düşük dönel simetri |
|
|---|
| Uncontrolled term |
Polarizasyon ayırıcılar |
|
|---|
| Uncontrolled term |
Sıfır kırıcılık indisi |
|
|---|
| Uncontrolled term |
Anizotropi |
|
|---|
| Uncontrolled term |
Dalga Kılavuzları |
|
|---|
| Uncontrolled term |
Mach-Zehnder interferometreleri |
|
|---|
| Uncontrolled term |
Optik sensörler |
|
|---|
| Uncontrolled term |
Mod dönüştürücüler |
|
|---|
| Uncontrolled term |
Photonic crystals |
|
|---|
| Uncontrolled term |
Rotational symmetry |
|
|---|
| Uncontrolled term |
Low rotational symmetry |
|
|---|
| Uncontrolled term |
Polarization beam splitters |
|
|---|
| Uncontrolled term |
Zero-refractive-index, Anisotropy |
|
|---|
| Uncontrolled term |
Waveguides, Mach- Zehnder interferometers |
|
|---|
| Uncontrolled term |
Optical sensors, Mode converters |
| 710 #2 - ADDED ENTRY--CORPORATE NAME |
|---|
| Corporate name or jurisdiction name as entry element |
TOBB Ekonomi ve Teknoloji Üniversitesi. |
| Subordinate unit |
Fen Bilimleri Enstitüsü |
| 9 (RLIN) |
77078 |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
|---|
| Uniform Resource Identifier |
<a href="https://tez.yok.gov.tr/">https://tez.yok.gov.tr/</a> |
| Materials specified |
Ulusal Tez Merkezi |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
Thesis |
| Source of classification or shelving scheme |
Other/Generic Classification Scheme |
