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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