Nanomanipulation Using Silicon Photonic Crystal Resonators
Nanomanipulation Using Silicon Photonic Crystal Resonators
复制标题
DOI：
10.1021/nl9029225
复制
发表时间：
2010-01-01
期刊：
影响因子：
10.8
通讯作者：
Erickson, David
中科院分区：
文献类型：
--
作者：
Mandal, Sudeep;Serey, Xavier;Erickson, David
光镊已经使许多微尺度过程成为可能，例如单细胞处理（2）、流式细胞术（3）、定向组装（4.5）和光学层析。(6.7)为了将这种功能扩展到纳米级，已经开发了许多近场方法，这些方法通过限制光来产生更高的光学力。到亚波长体积。（8-10）目前，这些技术在可执行的处理的复杂性和精度方面都受到限制。在这里，我们提出了一类新的利用一维硅光子晶体中的光学共振的纳米级光学陷阱。通过同时利用光在耦合波导（11）中的传播性质及其在谐振器内的静止性质，沿着传输、捕获和操纵较大纳米颗粒的能力，证明了48 nm和62 nm介电纳米颗粒的捕获。谐振器内的场放大被示出为产生比传统的镊子强几个数量级的陷阱和比其他近场技术硬一个数量级。我们的方法为一类新的光学捕获平台奠定了基础，这些平台最终可以实现复杂的全光学单分子操纵和纳米材料的定向组装。
Optical tweezers' have enabled a number of microscale processes such as single cell handling(2), flow-cytometry(3), directed assembly,(4.5) and optical chromatography.(6.7) To extend this functionality to the nanoscale, a number of near-field approaches have been developed that yield much higher optical forces by confining light. to subwavelength volumes.(8-10) At present, these techniques are limited in both the complexity and precision with which handling can be performed, Here, we present a new class of nanoscale optical trap exploiting optical resonance in one-dimensional silicon photonic crystals. The trapping of 48 nm and 62 nm dielectric nanoparticles is demonstrated along with the ability to transport, trap, and manipulate larger nanoparticles by simultaneously exploiting the propagating nature of the light in a coupling waveguide(11) and its stationary nature within the resonator. Field amplification within the resonator is shown to produce a trap several orders of magnitude stronger than conventional tweezers and an order of magnitude stiffer than other near-field techniques. Our approach lays the groundwork for a new class of optical trapping platforms that Could eventually enable complex all-optical single molecule manipulation and directed assembly of nanoscale material.