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Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material
Photonic crystals (PCs) are periodically patterned dielectrics providing opportunities to shape and slow down the light for processing of optical signals, lasing and spontaneous emission control. Unit cells of conventional PCs are comparable to the wavelength of light and are not suitable for subwav...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6318287/ https://www.ncbi.nlm.nih.gov/pubmed/30604741 http://dx.doi.org/10.1038/s41467-018-07795-6 |
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author | Alfaro-Mozaz, F. J. Rodrigo, S. G. Alonso-González, P. Vélez, S. Dolado, I. Casanova, F. Hueso, L. E. Martín-Moreno, L. Hillenbrand, R. Nikitin, A. Y. |
author_facet | Alfaro-Mozaz, F. J. Rodrigo, S. G. Alonso-González, P. Vélez, S. Dolado, I. Casanova, F. Hueso, L. E. Martín-Moreno, L. Hillenbrand, R. Nikitin, A. Y. |
author_sort | Alfaro-Mozaz, F. J. |
collection | PubMed |
description | Photonic crystals (PCs) are periodically patterned dielectrics providing opportunities to shape and slow down the light for processing of optical signals, lasing and spontaneous emission control. Unit cells of conventional PCs are comparable to the wavelength of light and are not suitable for subwavelength scale applications. We engineer a nanoscale hole array in a van der Waals material (h-BN) supporting ultra-confined phonon polaritons (PhPs)—atomic lattice vibrations coupled to electromagnetic fields. Such a hole array represents a polaritonic crystal for mid-infrared frequencies having a unit cell volume of [Formula: see text] (with λ(0) being the free-space wavelength), where PhPs form ultra-confined Bloch modes with a remarkably flat dispersion band. The latter leads to both angle- and polarization-independent sharp Bragg resonances, as verified by far-field spectroscopy and near-field optical microscopy. Our findings could lead to novel miniaturized angle- and polarization-independent infrared narrow-band couplers, absorbers and thermal emitters based on van der Waals materials and other thin polar materials. |
format | Online Article Text |
id | pubmed-6318287 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-63182872019-01-07 Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material Alfaro-Mozaz, F. J. Rodrigo, S. G. Alonso-González, P. Vélez, S. Dolado, I. Casanova, F. Hueso, L. E. Martín-Moreno, L. Hillenbrand, R. Nikitin, A. Y. Nat Commun Article Photonic crystals (PCs) are periodically patterned dielectrics providing opportunities to shape and slow down the light for processing of optical signals, lasing and spontaneous emission control. Unit cells of conventional PCs are comparable to the wavelength of light and are not suitable for subwavelength scale applications. We engineer a nanoscale hole array in a van der Waals material (h-BN) supporting ultra-confined phonon polaritons (PhPs)—atomic lattice vibrations coupled to electromagnetic fields. Such a hole array represents a polaritonic crystal for mid-infrared frequencies having a unit cell volume of [Formula: see text] (with λ(0) being the free-space wavelength), where PhPs form ultra-confined Bloch modes with a remarkably flat dispersion band. The latter leads to both angle- and polarization-independent sharp Bragg resonances, as verified by far-field spectroscopy and near-field optical microscopy. Our findings could lead to novel miniaturized angle- and polarization-independent infrared narrow-band couplers, absorbers and thermal emitters based on van der Waals materials and other thin polar materials. Nature Publishing Group UK 2019-01-03 /pmc/articles/PMC6318287/ /pubmed/30604741 http://dx.doi.org/10.1038/s41467-018-07795-6 Text en © The Author(s) 2019 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/. |
spellingShingle | Article Alfaro-Mozaz, F. J. Rodrigo, S. G. Alonso-González, P. Vélez, S. Dolado, I. Casanova, F. Hueso, L. E. Martín-Moreno, L. Hillenbrand, R. Nikitin, A. Y. Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material |
title | Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material |
title_full | Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material |
title_fullStr | Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material |
title_full_unstemmed | Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material |
title_short | Deeply subwavelength phonon-polaritonic crystal made of a van der Waals material |
title_sort | deeply subwavelength phonon-polaritonic crystal made of a van der waals material |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6318287/ https://www.ncbi.nlm.nih.gov/pubmed/30604741 http://dx.doi.org/10.1038/s41467-018-07795-6 |
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