Imaging Gold Nanorods by Plasmon-Resonance-Enhanced Four Wave Mixing

被引：39

作者：

Jung, Yookyung ^{[2
]}

Chen, Hongtao ^{[1
]}

Tong, Ling ^{[1
]}

Cheng, Ji-Xin ^{[1
,3
]}

机构：

[1] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

[2] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[3] Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 07期

基金：

美国国家科学基金会;

关键词：

PHOTOACOUSTIC TOMOGRAPHY; 2ND-HARMONIC GENERATION; RAMAN-SCATTERING; NANOPARTICLES; LUMINESCENCE; MICROSCOPY; NANOWIRES; DYNAMICS;

D O I：

10.1021/jp810852c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The current work investigates the four-wave mixing (FWM) signal from gold nanorods (NRs) using two synchronized lasers and its potential applications in bioimaging. Using the lightning rod model, we show that the strongest FWM occurs when the pump laser wavelength is tuned to be resonant with the longitudinal plasmon resonance wavelength of NR. The calculation is experimentally demonstrated by comparing the intensities of FWM from NRs with different plasmon resonance wavelengths. The FWM signal is further found to be enhanced by aggregation of NRs and is strongly dependent on pulse width. The FWM intensity from NRs is similar to 39 times stronger than the coherent anti-Stokes Raman scattering intensity from melamine beads. This plasmon-resonance-enhanced FWM signal enables NRs to be used as a nonlinear optical (NLO) imaging probe.

引用

页码：2657 / 2663

页数：7

共 31 条

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