Imperial College London
Alternate

ProfessorRichardCraster

Faculty of Natural Sciences

Dean of the Faculty of Natural Sciences
 
 
 
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Contact

 

+44 (0)20 7594 8554r.craster Website

 
 
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Assistant

 

Miss Hannah Cline +44 (0)20 7594 1934

 
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Location

 

3.05Faculty BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Palmer:2019:10.1038/s41467-019-09939-8,
author = {Palmer, S and Xiao, X and Pazos-Perez, N and Guerrini, L and Correa-Duarte, M and Maier, S and Craster, R and Alvarez-Puebla, R and Giannini, V},
doi = {10.1038/s41467-019-09939-8},
journal = {Nature Communications},
title = {Extraordinarily transparent compact metallic metamaterials},
url = {http://dx.doi.org/10.1038/s41467-019-09939-8},
volume = {10},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The design of achromatic optical components requires materials with high transparency and low dispersion. We show that although metals are highly opaque, densely packed arrays of metallic nanoparticles can be more transparent to infrared radiation than dielectrics such as germanium, even when the arrays are over 75% metal by volume. Such arrays form effective dielectrics that are virtually dispersion-free over ultra-broadband ranges of wavelengths from microns up to millimeters or more. Furthermore, the local refractive indices may be tuned by altering the size, shape, and spacing of the nanoparticles, allowing the design of gradient-index lenses that guide and focus light on the microscale. The electric field is also strongly concentrated in the gaps between the metallic nanoparticles, and the simultaneous focusing and squeezing of the electric field produces strong ‘doubly-enhanced’ hotspots which could boost measurements made using infrared spectroscopy and other non-linear processes over a broad range of frequencies.
AU  - Palmer,S
AU  - Xiao,X
AU  - Pazos-Perez,N
AU  - Guerrini,L
AU  - Correa-Duarte,M
AU  - Maier,S
AU  - Craster,R
AU  - Alvarez-Puebla,R
AU  - Giannini,V
DO  - 10.1038/s41467-019-09939-8
PY  - 2019///
SN  - 2041-1723
TI  - Extraordinarily transparent compact metallic metamaterials
T2  - Nature Communications
UR  - http://dx.doi.org/10.1038/s41467-019-09939-8
UR  - http://hdl.handle.net/10044/1/69859
VL  - 10
ER  -
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