2024-03-29T15:37:25Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/509792020-03-12T09:59:16Zcom_10261_10252com_10261_3col_10261_10253
Guiding Light in Monolayers of Sparse and Random Plasmonic Meta-atoms
Otte, Marinus A.
Estévez, M. Carmen
Regatos, David
Lechuga, Laura M.
Sepúlveda, Borja
Ministerio de Ciencia e Innovación (España)
Ministerio de Ciencia e Innovación (España)
Fundación Botín
European Commission
Ministerio de Educación (España)
Consejo Superior de Investigaciones Científicas (España)
Eusko Jaurlaritza
Encouraged by the capacity of surface plasmons to confine and propagate electromagnetic fields, waveguiding concepts have been developed, including combinations of continuous metal films or ordered arrays of metal nanoparticles. So far, waveguiding in the latter systems has been based on near-field or diffractive coupling. Herein, we show that monolayers of sparse and disordered gold nanoparticles support a novel transverse-electric guided mode that, contrary to previous work, relies on the strong enhancement of the polarizability upon excitation of the nanoparticle LSPR, creating an effective refractive index sufficiently high to support light guidance over a large range of frequencies. Excitation of this guided mode offers interesting nanophotonics features and applications such as a tunable total absorption spectral band, attractive for light harvesting applications, or the generation of a large amplification of the sensitivity to changes of refractive index accompanied with striking enhancement of the limit of detection in real biosensing experiments. © 2011 American Chemical Society.
2012-06-06T11:54:57Z
2012-06-06T11:54:57Z
2011
2012-06-06T11:54:57Z
artículo
ACS Nano 5: 9179-9186 (2011)
http://hdl.handle.net/10261/50979
10.1021/nn203432z
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100003086
http://dx.doi.org/10.13039/501100003339
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100006373
eng
closedAccess
American Chemical Society