Surface-Enhanced Raman Scattering with Ag Nanoparticles Optically Trapped by a Photonic Crystal Cavity

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• 作者：Shiyun Lin ; Wenqi Zhu ; Yuhang Jin ; Kenneth B. Crozier
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：February 13, 2013
• 年：2013
• 卷：13
• 期：2
• 页码：559-563
• 全文大小：395K
• 年卷期：v.13,no.2(February 13, 2013)
• ISSN：1530-6992

文摘

We demonstrate a reusable and reconfigurable surface enhanced Raman scattering (SERS) platform by optically trapping Ag nanoparticles with a photonic crystal cavity integrated with a microfluidic chip. High-performance SERS is performed in a very reproducible manner, owing to the fact that Ag aggregates are produced by optical trapping in a controllable process that is monitored in real-time by the cavity resonance shift that occurs with the trapping of each additional nanoparticle.

Keywords:

Optical trapping; SERS; silicon photonics; resonator