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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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.
|Subjects:||Material Science > Nanofabrication processes and tools|
Physical Science > Nano objects
Physical Science > Photonics
|Deposited By:||Farnush Anwar|
|Deposited On:||12 Dec 2008 15:12|
|Last Modified:||13 Jan 2009 15:56|
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