Journal
OPTICS EXPRESS
Volume 27, Issue 21, Pages 30692-30699Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.030692
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Funding
- National Natural Science Foundation of China [61875099, 61505092]
- Natural Science Foundation of Zhejiang Province [LGJ18F050001, LY18F050005]
- Air Force Office of Scientific Research [FA9550-17-C-0017]
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We design and fabricate an on-substrate bowtie photonic crystal (PhC) cavity in silicon. By optimizing the bowtie shapes in the unit cells of the PhC cavity, the maximum of the electric field can be highly confined in the bowtie tips. Due to such confinement, an ultra-low mode volume of similar to 0.1( lambda/n(Si))(3) is achieved, which is more than an order of magnitude smaller than the previous on-substrate nanobeam cavities. An ultra-high quality (Q) factor as large as 10(6) is predicted by simulation, and up to 1.4 x 10(4) is measured in experiment. The observation of pronounced thermo-optic bistability is consistent with the strong confinement of light in the cavities. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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