What is it about?
Light is trapped in a 3D resonator that can be used to transfer selected light frequencies between different on-chip optical networks.
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Why is it important?
Most photonic filters are only planar like silicon ring resonators or non integratable if they are not. Rolled-up microcavities allow integrated fabrication and an out of plane light confinement. This could be used to couple photonic networks on stacked layers in three dimensional chips.
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This page is a summary of: Vertically aligned rolled-up SiO2 optical microcavities in add-drop configuration, Applied Physics Letters, June 2013, American Institute of Physics,
DOI: 10.1063/1.4812661.
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