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Proceedings Paper

Quality factor optimization of photonic crystal cavities through multiple multipole expansion technique and power loss integral
Author(s): Reihaneh Jannesary; Saeid Zamiri; Azar D. Mazaheri; Abouzar Hamidipour; Abbas Mohtashami; Kurt Hingerl; Javad Zarbakhsh
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Paper Abstract

The Local Density of photonic States (LDOS) and Multiple Multipole Expansion technique (MME) are powerful tools in the study of spontaneous emission and calculation of photon confinement as well as efficient calculation of stationary field in planar photonic crystals. We bridge between optimization of Purcell factor and Q-factor in photonic crystal micro-cavities on one hand, and cavity power loss on the other hand. The quality factor calculated through a pulse response technique based on Finite Difference Time Domain (FDTD) simulations are compared with quality factor calculated by other approaches of LDOS and power loss. It turned out that the latter methods are more accurate and computationally less expensive. The cavity power loss is defined as the surface integration of energy density flow projected toward outside of the effective cavity volume. It is shown that size changes and shifting the neighboring rods or holes have a large impact on the mode volume and confinement. The quality factor optimization is performed for a H1- photonic crystal cavity, and mode volume investigations carried out for high Q factor arrangements. These investigations are resulted in effective structural design rules and geometrical freedom contour plots for the neighboring rods in the vicinity of the micro-cavity. These generalized design rules are suitable for further studies in other photonic micro-cavities.

Paper Details

Date Published: 6 May 2008
PDF: 12 pages
Proc. SPIE 6989, Photonic Crystal Materials and Devices VIII, 69891B (6 May 2008); doi: 10.1117/12.781467
Show Author Affiliations
Reihaneh Jannesary, Johannes Kepler Univ. Linz (Austria)
Saeid Zamiri, Johannes Kepler Univ. Linz (Austria)
Azar D. Mazaheri, Univ. of Isfahan (Iran)
Abouzar Hamidipour, Sahand Univ. of Technology (Iran)
Abbas Mohtashami, Johannes Kepler Univ. Linz (Austria)
Kurt Hingerl, Johannes Kepler Univ. Linz (Austria)
Javad Zarbakhsh, Johannes Kepler Univ. Linz (Austria)
Kompetenzzentrum Automobil- und Industrie-Elektronik GmbH (Germany)

Published in SPIE Proceedings Vol. 6989:
Photonic Crystal Materials and Devices VIII
Richard M. De La Rue; Ceferino López; Michele Midrio; Pierre Viktorovitch, Editor(s)

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