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Publisher DOI: 10.1002/adom.202100785
Title: Control over light emission in low-refractive-index artificial materials inspired by reciprocal design
Language: English
Authors: Maiwald, Lukas 
Sommer, Timo 
Sidorenko, Mikhail S. 
Yafyasov, Ruslan R. 
Mustafa, Meraj E 
Schulz, Kai Marvin 
Rybin, Mikhail V. 
Eich, Manfred 
Petrov, Alexander  
Keywords: additive technology; low-index artificial materials; low-index complete photonic bandgap; reciprocal space engineering; wave localization
Issue Date: 4-Jan-2022
Publisher: Wiley-VCH
Source: Advanced Optical Materials 10 (1): 2100785 (2022-01)
Abstract (english): 
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.
DOI: 10.15480/882.4740
ISSN: 2195-1071
Journal: Advanced optical materials 
Institute: Optische und Elektronische Materialien E-12 
Document Type: Article
Project: SPP 1839: Teilprojekt "Quasi-ungeordnete Strukturen mit vollständiger photonischer Bandlücke 2D und 3D mit beliebig kleinen Brechungsindexkontrasten" 
Projekt DEAL 
License: CC BY-NC 4.0 (Attribution-NonCommercial) CC BY-NC 4.0 (Attribution-NonCommercial)
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