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. 2018 Mar 15;8:4642. doi: 10.1038/s41598-018-22895-5

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© The Author(s) 2018

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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Contour maps showing the dependence of Q_PSB and λ_PSB of apodized NAA-DBRs as a function of the fabrication parameters (ΔA_J = A_max − A_min – amplitude difference and t_pw – pore widening time) (Note: ΔA_J = 0 – non-apodized NAA-DBRs). (a and b) Values of Q_PSB and λ_PSB as a function of ΔA_J and t_pw for linear positive apodization, respectively. (c and d) Values of Q_PSB and λ_PSB as a function of ΔA_J and t_pw for linear negative apodization, respectively. (e and f) Values of Q_PSB and λ_PSB as a function of ΔA_J and t_pw for logarithmic positive apodization, respectively. (g and h) Values of Q_PSB and λ_PSB as a function of ΔA_J and t_pw for logarithmic negative apodization, respectively.