Abstract
In recent years the application of 2-Dimensional (2D) metallic Photonic-Crystal (PC) structures to high-power microwave devices, such as particle accelerators and gyrotrons, has gained increased interest. In this paper we focus on the effect disorder has on the resonant frequency and peak electric field in the defect site of a 2D PC structure. For disorders up to a maximum of 15% variation in position and radius, we found that disorder applied to the innermost rods surrounding the defect site dominates in determining the peak field and resonant frequency of the structure. We also show that small disorder (1%) can lead to an increase in peak field in certain cases due to structure optimization. We find that increasing levels of disorder lead to a decreasing average peak field for all structures. Whereas the mean resonant frequency remains constant for increasing disorder while the standard deviation increases. We then develop an understanding for this behaviour in terms of frequency detuning and mode confinement.
Original language | English |
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Pages (from-to) | 381-388 |
Number of pages | 8 |
Journal | Applied Physics B: Lasers and Optics |
Volume | 94 |
Issue number | 3 |
Early online date | 29 Nov 2008 |
DOIs | |
Publication status | Published - Mar 2009 |
Externally published | Yes |