Abstract
| Original language | English |
|---|---|
| Article number | 063009 |
| Journal | New Journal of Physics |
| Volume | 12 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2010 |
| MoE publication type | A1 Journal article-refereed |
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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 journal › Article › Scientific › peer-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 -