20th Annual Student Research Conference
Science
Coupled Defects in Coaxial Cable Photonic Crystals
Brian A. Ruzicka
Dr. Matthew M. Beaky, Faculty Mentor
As electromagnetic radiation passes through a periodically structured medium called a photonic crystal, only radiation within specific frequency ranges is allowed to pass. At other frequencies the radiation is reflected, and the resulting reduced transmission regions are called band gaps. Adding a defect to the structure of the photonic crystal disrupts its periodicity and produces a narrow transmission mode within the band gap. Two or more defects in the photonic crystal may couple together, resulting in a splitting of the transmission mode. This effect can be observed experimentally by applying a microwave signal to a series of coaxial cables with varying impedances and lengths. This research examined coaxial cable photonic crystals experimentally and theoretically, with an emphasis on photonic crystals containing coupled defects. Examples of coupled defect modes will be presented, along with a simple model to explain the observed results.
Keywords: physics, photonic crystal, band gap, coaxial cable
Topic(s):Physics
Presentation Type: Oral Paper
Session: 47-3
Location: VH 1416
Time: 1:45 pm