Ross Benjamin M, Lee Luke P
Applied Science and Technology Graduate Group, Biomolecular Nanotechnology Center, Berkeley Sensor and Actuator Center, Department of Bioengineering, University of California-Berkeley, Berkeley, CA 94720, USA.
Nanotechnology. 2008 Jul 9;19(27):275201. doi: 10.1088/0957-4484/19/27/275201. Epub 2008 May 27.
We present a systematic numerical study of plasmon resonance of the nanocrescent. We show that by varying the nanocrescent geometry, the plasmon resonance peak can be tuned into the near-infrared and local field enhancement can be increased significantly, with maximum enhancement of the electric field amplitude of approximately 100 for realistic geometric parameters. Because of its wide tunability, high local field enhancement, and geometry which utilizes both sharp features and intra-particle coupling, the nanocrescent is a structure well suited for in vivo cellular imaging as well as in vitro diagnostic applications.
我们对纳米月牙形结构的等离子体共振进行了系统的数值研究。我们表明，通过改变纳米月牙形结构的几何形状，等离子体共振峰可以调谐到近红外区域，并且局部场增强可以显著提高，对于实际的几何参数，电场振幅的最大增强约为100。由于其广泛的可调谐性、高局部场增强以及利用了尖锐特征和粒子内耦合的几何形状，纳米月牙形结构非常适合用于体内细胞成像以及体外诊断应用。
