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. 2019 Dec 30;9:20338. doi: 10.1038/s41598-019-56692-5

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) Simulated mode field profile for a cavity with a Q-factor larger than 20,000 in a HUDS slab with TE polarization PBG. (b) Simulated mode field profile of the HUDS-cladded photonic crystal cavity with a Q factor of 1 million. (c) Simulated mode field profile of the resonant mode of a HUDS-based cavity-waveguide filter and (d) its simulated transmission spectrum.