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arXiv · 1810.06734

Ridge Resonance: A new Resonance Phenomenon for Silicon Photonics Harnessing Bound States in the Continuum

Thach G. Nguyen·Guanghui Ren·Steffen Schoenhardt·Markus Knoerzer·Andreas Boes·Arnan Mitchell
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Abstract

We present a new resonant behavior based on bound states in the continuum in a guided wave silicon platform. The continuum has the form of a collimated beam of light which is confined vertically in a TE mode of a silicon slab. The bound state is a discrete TM mode of a ridge on the silicon slab. The coupling between the slab and ridge modes results in a single sharp resonance at the wavelength where they phase match. We experimentally demonstrate this phenomenon on a silicon photonic chip using foundry compatible parameters and interface it on-chip to standard single mode silicon nanowire waveguides. The fabricated chip exhibits a single sharp resonance near 1550 nm with a line width of a few nanometer, an extinction ratio of 25 dB and a thermal stability of 19.5 pm/C. We believe that this is the first demonstration of bound states in the continuum resonance realized using guided wave components.

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Thach G. Nguyen, Guanghui Ren, Steffen Schoenhardt, Markus Knoerzer, Andreas Boes, Arnan Mitchell. 2018-10-15. Ridge Resonance: A new Resonance Phenomenon for Silicon Photonics Harnessing Bound States in the Continuum. https://doi.org/10.1002/lpor.201900035

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