Control over light emission in low-refractive-index artificial materials inspired by reciprocal design

Reciprocal space engineering allows tailoring the scattering response of media with a low refractive-index contrast. Here it is shown that a quasiperiodic leveled-wave structure with well-defined reciprocal space and random real space distribution can be engineered to open a complete photonic bandgap (CPBG) for any refractive-index contrast. For these structures, an analytical estimation is derived, which predicts that there is an optimal number of Bragg peaks for any refractive-index contrast. A finite 2D or 3D CPBG is expected at this optimal number even for an arbitrarily small refractive-index contrast. Results of numerical simulations of dipole emission in 2D and 3D structures support the estimations. In 3D simulations, an emission suppression of almost 10 dB is demonstrated with a refractive index down to 1.38. The 3D structures are realized by additive manufacturing on millimeter scale for a material with a refractive index of n ≈ 1.59. Measurements confirm a strong suppression of microwave transmission in the expected frequency range.

Subjects

additive technology

low-index artificial materials

low-index complete photonic bandgap

reciprocal space engineering

wave localization

DDC Class

530: Physik

600: Technik

Funding(s)

SPP 1839: Teilprojekt "Quasi-ungeordnete Strukturen mit vollständiger photonischer Bandlücke 2D und 3D mit beliebig kleinen Brechungsindexkontrasten"

Projekt DEAL

Publication version

publishedVersion

Lizenz

https://creativecommons.org/licenses/by-nc/4.0/

Name

Advanced Optical Materials - 2021 - Maiwald - Control over Light Emission in Low%u2010Refractive%u2010Index Artificial Materials.pdf

Size

1.68 MB

Format

Adobe PDF

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Control over light emission in low-refractive-index artificial materials inspired by reciprocal design