Novel dielectric photonic-band-gap resonant cavity loaded in a gyrotron

A novel resonant cavity composed of a periodic, multilayer, dielectric photonic crystal is proposed. Using the transfer matrix method and the Bloch theorem for periodic systems, an analysis on the band-gap property of such a structure is made, and the basic electromagnetic property of the photonic-b...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2010-10, Vol.43 (40), p.405101-405101
Main Authors: Xiaoan, Chen, Gaofeng, Liu, Changjian, Tang
Format: Article
Language:English
Subjects:
Applied sciences
Band theory
Devices
Dielectrics
Electromagnetic properties
Electronic tubes, masers
Electronics
Exact sciences and technology
Gyrotrons
Holes
Multilayers
Simulation
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Summary:A novel resonant cavity composed of a periodic, multilayer, dielectric photonic crystal is proposed. Using the transfer matrix method and the Bloch theorem for periodic systems, an analysis on the band-gap property of such a structure is made, and the basic electromagnetic property of the photonic-band-gap resonant cavity (PBGC) is preliminarily exhibited. The theoretical studies and the cold cavity simulation results obtained from a high-frequency structure simulator are presented. On the basis of the present research, such a PBGC is quite similar to the two-dimensional PBGC made of triangular lattices of metal rods with a defect at its centre, in which a frequency selectivity is similarly demonstrated. Because of its unique electromagnetic property, the cavity has many promising applications in active and passive devices operating in the millimetre, sub-millimetre, and even THz wave range. As a specific application, the feasibility of substituting the traditional cylindrical resonant cavity loaded in a gyrotron for a dielectric PBGC to achieve a transverse high-order operation is discussed under the consideration of the electromagnetic features of the cavity. The study shows the great potential value of such a cavity for gyrotron devices.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/43/40/405101