Silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission

Abstract Light extraction from a thin planar layer can be increased by introducing a two-dimensional periodic pattern on its surface. This structure, the so-called photonic crystal (PhC) slab, then not only enhances the extraction efficiency of light but can direct the extracted emission into desire...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	L. Ondič, M. Varga, I. Pelant, J. Valenta, A. Kromka, R. G. Elliman
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/435f2c32899041349016668eb87c8f80
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:435f2c32899041349016668eb87c8f80
record_format	dspace
spelling	oai:doaj.org-article:435f2c32899041349016668eb87c8f802021-12-02T11:52:44ZSilicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission10.1038/s41598-017-05973-y2045-2322https://doaj.org/article/435f2c32899041349016668eb87c8f802017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05973-yhttps://doaj.org/toc/2045-2322Abstract Light extraction from a thin planar layer can be increased by introducing a two-dimensional periodic pattern on its surface. This structure, the so-called photonic crystal (PhC) slab, then not only enhances the extraction efficiency of light but can direct the extracted emission into desired angles. Careful design of the structures is important in order to have a spectral overlap of the emission with extraction (leaky) modes. We show that by fabricating PhC slabs with optimized dimensions from silicon nanocrystals (SiNCs) active layers, the extraction efficiency of vertical light emission from SiNCs at a particular wavelength can be enhanced ∼ 11 times compared to that of uncorrugated SiNCs-rich layer. More importantly, increased light emission can be obtained in a broad spectral range and, simultaneously, the extracted light can stay confined within relatively narrow angle around the normal to the sample plane. We demonstrate experimentally and theoretically that the physical origin of the enhancement is such that light originating from SiNCs first couples to leaky modes of the PhCs and is then efficiently extracted into the surrounding.L. OndičM. VargaI. PelantJ. ValentaA. KromkaR. G. EllimanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q L. Ondič M. Varga I. Pelant J. Valenta A. Kromka R. G. Elliman Silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission
description	Abstract Light extraction from a thin planar layer can be increased by introducing a two-dimensional periodic pattern on its surface. This structure, the so-called photonic crystal (PhC) slab, then not only enhances the extraction efficiency of light but can direct the extracted emission into desired angles. Careful design of the structures is important in order to have a spectral overlap of the emission with extraction (leaky) modes. We show that by fabricating PhC slabs with optimized dimensions from silicon nanocrystals (SiNCs) active layers, the extraction efficiency of vertical light emission from SiNCs at a particular wavelength can be enhanced ∼ 11 times compared to that of uncorrugated SiNCs-rich layer. More importantly, increased light emission can be obtained in a broad spectral range and, simultaneously, the extracted light can stay confined within relatively narrow angle around the normal to the sample plane. We demonstrate experimentally and theoretically that the physical origin of the enhancement is such that light originating from SiNCs first couples to leaky modes of the PhCs and is then efficiently extracted into the surrounding.
format	article
author	L. Ondič M. Varga I. Pelant J. Valenta A. Kromka R. G. Elliman
author_facet	L. Ondič M. Varga I. Pelant J. Valenta A. Kromka R. G. Elliman
author_sort	L. Ondič
title	Silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission
title_short	Silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission
title_full	Silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission
title_fullStr	Silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission
title_full_unstemmed	Silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission
title_sort	silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/435f2c32899041349016668eb87c8f80
work_keys_str_mv	AT londic siliconnanocrystalbasedphotoniccrystalslabswithbroadbandandefficientdirectionallightemission AT mvarga siliconnanocrystalbasedphotoniccrystalslabswithbroadbandandefficientdirectionallightemission AT ipelant siliconnanocrystalbasedphotoniccrystalslabswithbroadbandandefficientdirectionallightemission AT jvalenta siliconnanocrystalbasedphotoniccrystalslabswithbroadbandandefficientdirectionallightemission AT akromka siliconnanocrystalbasedphotoniccrystalslabswithbroadbandandefficientdirectionallightemission AT rgelliman siliconnanocrystalbasedphotoniccrystalslabswithbroadbandandefficientdirectionallightemission
_version_	1718394918922092544

Silicon nanocrystal-based photonic crystal slabs with broadband and efficient directional light emission

Ejemplares similares