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Proceedings Paper

Optimization of Q factor in optical nanocavities based on free-standing membranes
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Paper Abstract

We express the quality factor of a mode in terms of the Fourier transforms of its field components, and prove that the reduction in radiation loss can be achieved by suppressing the mode's wave-vector components within the light cone. Although this is intuitively clear, our analytical proof gives us insight into how to achieve the Q factor optimization, without the mode delocalization. We focus on the dipole defect mode in free standing membrane and achieve Q > 104, while preserving the mode volume of the order of one half of cubic wavelength in material. The derived expressions and conclusions can be used in optimization of Q factor for any type of defect in planar photonic crystals.

Paper Details

Date Published: 25 April 2002
PDF: 8 pages
Proc. SPIE 4655, Photonic Bandgap Materials and Devices, (25 April 2002); doi: 10.1117/12.463873
Show Author Affiliations
Jelena Vuckovic, California Institute of Technology (United States)
Axel Scherer, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 4655:
Photonic Bandgap Materials and Devices
Ali Adibi; Axel Scherer; Shawn-Yu Lin, Editor(s)

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