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

Jelena Vuckovic; Axel Scherer

doi:10.1117/12.463873

25 April 2002 Optimization of Q factor in optical nanocavities based on free-standing membranes

Jelena Vuckovic, Axel Scherer

Proceedings Volume 4655, Photonic Bandgap Materials and Devices; (2002) https://doi.org/10.1117/12.463873
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

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.

Citation Download Citation

Jelena Vuckovic and Axel Scherer "Optimization of Q factor in optical nanocavities based on free-standing membranes", Proc. SPIE 4655, Photonic Bandgap Materials and Devices, (25 April 2002); https://doi.org/10.1117/12.463873

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