Controlling uncoupled resonances in photonic crystals through breaking the mirror symmetry

Optics Express
Onur KilicOlav Solgaard

Abstract

We show that modes in a photonic crystal slab that are uncoupled to outside radiation in a symmetric structure can be excited by breaking the mirror symmetry through introducing a protrusion on the side of the photonic crystal holes. We show that coupling to these resonances can be controlled by the strength of this asymmetry, and that it is also possible to choose among modes to couple to, through the shape of the asymmetry introduced. We provide simple theoretical arguments that explain the effect, and present eigenmode simulations and time-domain simulations. We confirm this predicted behavior with measurements on a photonic crystal with a broken mirror symmetry that exhibits an additional sharp resonant feature with a linewidth of 0.5 nm, in agreement with both calculated and simulated predictions.

References

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Citations

Jul 15, 2015·Nano Letters·Kitty Y M YeungDonhee Ham
Jul 1, 2016·Nanoscale Research Letters·Hao Wang Rusli
Jun 2, 2015·Optics Letters·P Duke Anderson, Michelle L Povinelli
Jul 18, 2020·Physical Review Letters·Adam C OvervigNanfang Yu
Oct 30, 2020·Optics Express·Awad KhaledMohamed Hussein
Jan 15, 2021·Nanomaterials·Hartmut HillmerThomas Kusserow
Apr 1, 2014·Nano Letters·Kitty Y M YeungDonhee Ham

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