Enhancement of bulk-type multipolar second-harmonic generation arising from surface morphology of metals

Fu Xiang Wang, Francisco J. Rodriquez, Willem M. Albers, Martti Kauranen

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

Gold films of 20 and 150 nm nominal thickness were characterized by two-beam second-harmonic generation to address their second-order nonlinear optical responses of surface (dipolar) and bulk (higher multipolar) origin. The surface response is enhanced by ~20% in the case of the 20 nm film, as expected due to its higher surface roughness. Surprisingly, the bulk-type response is enhanced to a greater extent, exceeding 80%, and this can be explained by effective quadrupolar nonlinearity arising from the field interaction with the local nonlinearity of nanoscale surface features.
Original languageEnglish
Article number063009
JournalNew Journal of Physics
Volume12
Issue number6
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Fingerprint

harmonic generations
augmentation
nonlinearity
metals
surface roughness
gold
interactions

Cite this

Wang, Fu Xiang ; Rodriquez, Francisco J. ; Albers, Willem M. ; Kauranen, Martti. / Enhancement of bulk-type multipolar second-harmonic generation arising from surface morphology of metals. In: New Journal of Physics. 2010 ; Vol. 12, No. 6.
@article{352259b0c356459c93438181ebe1afdc,
title = "Enhancement of bulk-type multipolar second-harmonic generation arising from surface morphology of metals",
abstract = "Gold films of 20 and 150 nm nominal thickness were characterized by two-beam second-harmonic generation to address their second-order nonlinear optical responses of surface (dipolar) and bulk (higher multipolar) origin. The surface response is enhanced by ~20{\%} in the case of the 20 nm film, as expected due to its higher surface roughness. Surprisingly, the bulk-type response is enhanced to a greater extent, exceeding 80{\%}, and this can be explained by effective quadrupolar nonlinearity arising from the field interaction with the local nonlinearity of nanoscale surface features.",
author = "Wang, {Fu Xiang} and Rodriquez, {Francisco J.} and Albers, {Willem M.} and Martti Kauranen",
year = "2010",
doi = "10.1088/1367-2630/12/6/063009",
language = "English",
volume = "12",
journal = "New Journal of Physics",
issn = "1367-2630",
publisher = "Institute of Physics IOP",
number = "6",

}

Enhancement of bulk-type multipolar second-harmonic generation arising from surface morphology of metals. / Wang, Fu Xiang; Rodriquez, Francisco J.; Albers, Willem M.; Kauranen, Martti.

In: New Journal of Physics, Vol. 12, No. 6, 063009, 2010.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Enhancement of bulk-type multipolar second-harmonic generation arising from surface morphology of metals

AU - Wang, Fu Xiang

AU - Rodriquez, Francisco J.

AU - Albers, Willem M.

AU - Kauranen, Martti

PY - 2010

Y1 - 2010

N2 - Gold films of 20 and 150 nm nominal thickness were characterized by two-beam second-harmonic generation to address their second-order nonlinear optical responses of surface (dipolar) and bulk (higher multipolar) origin. The surface response is enhanced by ~20% in the case of the 20 nm film, as expected due to its higher surface roughness. Surprisingly, the bulk-type response is enhanced to a greater extent, exceeding 80%, and this can be explained by effective quadrupolar nonlinearity arising from the field interaction with the local nonlinearity of nanoscale surface features.

AB - Gold films of 20 and 150 nm nominal thickness were characterized by two-beam second-harmonic generation to address their second-order nonlinear optical responses of surface (dipolar) and bulk (higher multipolar) origin. The surface response is enhanced by ~20% in the case of the 20 nm film, as expected due to its higher surface roughness. Surprisingly, the bulk-type response is enhanced to a greater extent, exceeding 80%, and this can be explained by effective quadrupolar nonlinearity arising from the field interaction with the local nonlinearity of nanoscale surface features.

U2 - 10.1088/1367-2630/12/6/063009

DO - 10.1088/1367-2630/12/6/063009

M3 - Article

VL - 12

JO - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

IS - 6

M1 - 063009

ER -