RT Journal Article
T1 Extraordinarily transparent compact metallic metamaterials
A1 Palmer, Samuel J
A1 Xiao, Xiaofei
A1 Pazos Pérez, Nicolás
A1 Guerrini, Luca
A1 Correa Duarte, Miguel Ángel
A1 Maier, Stefan A
A1 Craster, Richard V
A1 Álvarez Puebla, Ramón A
A1 Giannini, Vincenzo
K1 3312 Tecnología de Materiales
K1 3303 Ingeniería y Tecnología Químicas
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.
PB Nature Communications
SN 20411723
YR 2019
FD 2019-05-09
LK http://hdl.handle.net/11093/4030
UL http://hdl.handle.net/11093/4030
LA eng
NO Nature Communications, 10(1): 2118 (2019)
NO Ministerio de Economía | Ref. CTM2014-58481R
DS Investigo
RD 20-sep-2024