Tunable two-photon excited luminescence in single gold nanowires fabricated by lithographically patterned nanowire electrodeposition

Hyunmin Kim; Chengxiang Xiang; Aleix G. Güell; Reginald M. Penner; Eric O. Potma

doi:10.1021/jp8032758

Tunable two-photon excited luminescence in single gold nanowires fabricated by lithographically patterned nanowire electrodeposition

Hyunmin Kim, Chengxiang Xiang, Aleix G. Güell, Reginald M. Penner, Eric O. Potma

Division of Biotechnology

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

The two-photon excited luminescence (TPEL) of single gold nanowires was investigated under far-field illumination with picosecond pulses. These nanowires, having a rectangular cross-section, a precisely defined thickness, and millimeter-scale length, were prepared by using the lithographically patterned nanowire electrodepostion (LPNE) technique. The TPEL from these wires was investigated as a function of wire thickness. It is found that the optical properties of the wire are dominated by the transverse surface plasmon resonance, which enhances the two-photon absorption process and subsequent emission in the polarization direction of the plasmon mode. Upon tuning the thickness of the wire from 74 to 25 nm, an enhancement of 3 orders of magnitude in the TPEL was observed. The TPEL tunability is found to be consistent with the geometry-dependent field concentration at the metal surface as predicted by the lightning rod model.

Original language	English
Pages (from-to)	12721-12727
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	33
DOIs	https://doi.org/10.1021/jp8032758
State	Published - 21 Aug 2008

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title = "Tunable two-photon excited luminescence in single gold nanowires fabricated by lithographically patterned nanowire electrodeposition",

abstract = "The two-photon excited luminescence (TPEL) of single gold nanowires was investigated under far-field illumination with picosecond pulses. These nanowires, having a rectangular cross-section, a precisely defined thickness, and millimeter-scale length, were prepared by using the lithographically patterned nanowire electrodepostion (LPNE) technique. The TPEL from these wires was investigated as a function of wire thickness. It is found that the optical properties of the wire are dominated by the transverse surface plasmon resonance, which enhances the two-photon absorption process and subsequent emission in the polarization direction of the plasmon mode. Upon tuning the thickness of the wire from 74 to 25 nm, an enhancement of 3 orders of magnitude in the TPEL was observed. The TPEL tunability is found to be consistent with the geometry-dependent field concentration at the metal surface as predicted by the lightning rod model.",

author = "Hyunmin Kim and Chengxiang Xiang and G{\"u}ell, {Aleix G.} and Penner, {Reginald M.} and Potma, {Eric O.}",

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T1 - Tunable two-photon excited luminescence in single gold nanowires fabricated by lithographically patterned nanowire electrodeposition

AU - Kim, Hyunmin

AU - Xiang, Chengxiang

AU - Güell, Aleix G.

AU - Penner, Reginald M.

AU - Potma, Eric O.

PY - 2008/8/21

Y1 - 2008/8/21

N2 - The two-photon excited luminescence (TPEL) of single gold nanowires was investigated under far-field illumination with picosecond pulses. These nanowires, having a rectangular cross-section, a precisely defined thickness, and millimeter-scale length, were prepared by using the lithographically patterned nanowire electrodepostion (LPNE) technique. The TPEL from these wires was investigated as a function of wire thickness. It is found that the optical properties of the wire are dominated by the transverse surface plasmon resonance, which enhances the two-photon absorption process and subsequent emission in the polarization direction of the plasmon mode. Upon tuning the thickness of the wire from 74 to 25 nm, an enhancement of 3 orders of magnitude in the TPEL was observed. The TPEL tunability is found to be consistent with the geometry-dependent field concentration at the metal surface as predicted by the lightning rod model.

AB - The two-photon excited luminescence (TPEL) of single gold nanowires was investigated under far-field illumination with picosecond pulses. These nanowires, having a rectangular cross-section, a precisely defined thickness, and millimeter-scale length, were prepared by using the lithographically patterned nanowire electrodepostion (LPNE) technique. The TPEL from these wires was investigated as a function of wire thickness. It is found that the optical properties of the wire are dominated by the transverse surface plasmon resonance, which enhances the two-photon absorption process and subsequent emission in the polarization direction of the plasmon mode. Upon tuning the thickness of the wire from 74 to 25 nm, an enhancement of 3 orders of magnitude in the TPEL was observed. The TPEL tunability is found to be consistent with the geometry-dependent field concentration at the metal surface as predicted by the lightning rod model.

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Tunable two-photon excited luminescence in single gold nanowires fabricated by lithographically patterned nanowire electrodeposition

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