Controlled surface-plasmon coupling in SiO2-coated gold nanochains for tunable nonlinear optical properties
Controlled surface-plasmon coupling in SiO2-coated gold nanochains for tunable nonlinear optical properties
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DOI：
10.1063/1.2172022
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发表时间：
2006-02
影响因子：
4
通讯作者：
Yong Yang;M. Nogami;Jianlin Shi;Hangrong Chen;G. Ma;S. Tang
中科院分区：
文献类型：
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作者：
Yong Yang;M. Nogami;Jianlin Shi;Hangrong Chen;G. Ma;S. Tang
采用HAuCl4还原和表面活性剂化学修饰的方法，成功地在玻璃衬底上合成并自组装了在可见光到近红外多个波长范围内表现出较大三阶非线性的包覆金纳米粒子的线型链。分别测量了2、3、4和5Au粒子的横向和纵向表面等离子体共振模在530、620、715、830和1100 nm处的峰值吸收光谱。在多个波长观察到了显著增强的三阶非线性光学响应。
Linear chains of SiO2-coated Au nanoparticles, exhibiting large third-order nonlinearity at multiple wavelengths ranging from visible to near infrared, were successfully synthesized and self-assembled on glass substrates using a reduction of HAuCl4 and chemical surfactant modification. The optical absorption spectra peaking at 530, 620, 715, 830, and 1100nm wavelengths were measured to the transverse and longitudinal surface plasmon resonance modes of 2, 3, 4, and 5 Au particles, respectively. Greatly enhanced third-order nonlinear optical responses have been observed at multiple wavelengths.