Surface-enhanced Raman spectroscopy: nonlocal limitations

Publication: Research - peer-review › Journal article – Annual report year: 2012

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Surface-enhanced Raman spectroscopy: nonlocal limitations. / Toscano, Giuseppe ; Raza, Søren ; Xiao, Sanshui ; Wubs, Martijn ; Jauho, Antti-Pekka; Bozhevolnyi, Sergey I.; Mortensen, N. Asger.

In: Optics Letters, Vol. 37, No. 13, 2012, p. 2538-2540.

Publication: Research - peer-review › Journal article – Annual report year: 2012

In: Optics Letters, Vol. 37, No. 13, 2012, p. 2538-2540.

Publication: Research - peer-review › Journal article – Annual report year: 2012

Bibtex

@article{5ecdf9e210b940989f2662c7f741c83f,

title = "Surface-enhanced Raman spectroscopy: nonlocal limitations",

publisher = "Optical Society of America",

author = "Giuseppe Toscano and Søren Raza and Sanshui Xiao and Martijn Wubs and Antti-Pekka Jauho and Bozhevolnyi, {Sergey I.} and Mortensen, {N. Asger}",

note = "This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-37-13-2538. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.",

year = "2012",

volume = "37",

number = "13",

pages = "2538--2540",

journal = "Optics Letters",

issn = "0146-9592",

}

RIS

TY - JOUR

T1 - Surface-enhanced Raman spectroscopy: nonlocal limitations

A1 - Toscano,Giuseppe

A1 - Raza,Søren

A1 - Xiao,Sanshui

A1 - Wubs,Martijn

A1 - Jauho,Antti-Pekka

A1 - Bozhevolnyi,Sergey I.

A1 - Mortensen,N. Asger

AU - Toscano,Giuseppe

AU - Raza,Søren

AU - Xiao,Sanshui

AU - Wubs,Martijn

AU - Jauho,Antti-Pekka

AU - Bozhevolnyi,Sergey I.

AU - Mortensen,N. Asger

PB - Optical Society of America

PY - 2012

Y1 - 2012

N2 - Giant field enhancement and field singularities are a natural consequence of the commonly employed local-response framework. We show that a more general nonlocal treatment of the plasmonic response leads to new and possibly fundamental limitations on field enhancement with important consequences for our understanding of surface-enhanced Raman spectroscopy (SERS). The intrinsic length scale of the electron gas serves to smear out assumed field singularities, leaving the SERS enhancement factor finite, even for geometries with infinitely sharp features. For silver nanogroove structures, mimicked by periodic arrays of half-cylinders (up to 120 nm in radius), we find no enhancement factors exceeding 10 orders of magnitude (1010).

AB - Giant field enhancement and field singularities are a natural consequence of the commonly employed local-response framework. We show that a more general nonlocal treatment of the plasmonic response leads to new and possibly fundamental limitations on field enhancement with important consequences for our understanding of surface-enhanced Raman spectroscopy (SERS). The intrinsic length scale of the electron gas serves to smear out assumed field singularities, leaving the SERS enhancement factor finite, even for geometries with infinitely sharp features. For silver nanogroove structures, mimicked by periodic arrays of half-cylinders (up to 120 nm in radius), we find no enhancement factors exceeding 10 orders of magnitude (1010).

U2 - 10.1364/OL.37.002538

DO - 10.1364/OL.37.002538

JO - Optics Letters

JF - Optics Letters

SN - 0146-9592

IS - 13

VL - 37

SP - 2538

EP - 2540

ER -