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. 2018 Jan 1;18(1):105. doi: 10.3390/s18010105

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Experimentally-measured reflectance spectra of the double Bragg mirror structure following (a) (n_L1n_H1)⁹(n_L2n_H2)⁹; (b) (n_L1n_H1)¹⁰(n_L2n_H2)¹⁰; (c) (n_L1n_H1)¹¹(n_L2n_H2)¹¹; and (d) (n_L1n_H1)¹²(n_L2n_H2)¹² sequences.