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8 September 2006 Open cavities using photonic crystals with negative refraction
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Proceedings Volume 6343, Photonics North 2006; 63433M (2006)
Event: Photonics North 2006, 2006, Quebec City, Canada
Photonic crystals (PhCs) exhibiting negative refraction have attracted much attention in recent years, with a vast majority of this research focusing on subwavelength imaging. Although the possibility of an open cavity using such a PhC is mentioned in Notomi's pioneering work, fewer researchers have addressed this issue except one study of an open cavity using three 60-degree PhC wedges of the hexagonal lattice. This paper reports our study of several different open cavity configurations in hexagonal and square lattices. To form an open cavity using PhC with negative refraction, there are many parameters to optimize, such as the lattice type, lattice period, the diameter of the hole or rod, materials, and the geometrical configurations. We first propose several configurations for open cavities in general, including two square slabs, two or more prism slabs, and one slab with two reflectors; Then we demonstrate some results obtained from photonic crystals with square and hexagonal lattices, simulated by the use of the finite-difference time-domain (FDTD) method. It is shown that resonance can occur at the first band and higher bands. The Q-factor obtained is about 280 to 400, which can be improved by optimizing the surface terminations of the photonic crystal prisms.
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Guilin Sun, Aref Bakhtazad, Aju Jugessur, and Andrew G. Kirk "Open cavities using photonic crystals with negative refraction", Proc. SPIE 6343, Photonics North 2006, 63433M (8 September 2006);

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