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

Kim, Hyunmin and Xiang, Chengxiang and Guell, Aleix G. and Penner, Reginald M. and Potma, Eric O. (2008) Tunable two-photon excited luminescence in single gold nanowires fabricated by lithographically patterned nanowire electrodeposition. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (33). pp. 12721-12727.

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Official URL: http://pubs.acs.org/doi/abs/http://pubs.acs.org/do...

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.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Physical Science > Photonics
ID Code:1444
Deposited By:Farnush Anwar
Deposited On:12 Dec 2008 15:12
Last Modified:13 Jan 2009 15:56

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