Reconfigurable Sorting of Nanoparticles on a Thermal Tuning Silicon Based Optofluidic Chip

IEEE Photonics Journal

Zhoufeng Ying¹  Ho-pui Ho²  Guanghui Wang³  Xiaofu Xu³  Xuping Zhang³  Wenxiang Jiao³  Yuming Dong⁴ 

[1] Department of Electrical and Computer Engineering, University of Texas at Austin, Texas, USA;Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong;Institute of Optical Communication Engineering, Nanjing University, Jiangsu, China;Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China;

关键词: Integrated optics devices;    nanofluidics;    silicon photonics;    optical tweezers or optical manipulation.;   

DOI  :  10.1109/JPHOT.2017.2781283

来源: DOAJ

【 摘 要 】

We numerically demonstrate a scheme of optofluidic sorting of nanoparticles on a silicon-based lab-on-a-chip system, with reconfigurable and multilevel sorting size thresholds. Size-dependent sorting of nanoparticles originates from the size-dependent distribution of trapping potential wells, which determines whether a nanoparticle can jump back and forth between parallel waveguides in weakly coupling condition. In numerical modeling, we find that it is easier for larger ones to transfer and the size threshold is power ratio dependent. By setting a thermal tuning ring-assisted Mach-Zehnder interferometer ahead, we can adjust effectively the input power ratio of the parallel waveguides as well as the potential well distribution across them, working as a thermal tuning reconfigurable sorting unit. Consequently, a tree cascaded unit with different thresholds is also presented to be a reconfigurable multilevel sorting unit. The proposed design offers a simple and ultracompact scheme for the reconfigurable and multilevel optofluidic sorting of nanoparticles on thermo-optofluidics chip for the first time.

【 授权许可】

Unknown