利用氮化硅微盘谐振器中的回音壁模式对微颗粒进行光学操控。

Optical manipulation of microparticles using whispering-gallery modes in a silicon nitride microdisk resonator.

机构信息

Photonic Device Laboratory, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China.

出版信息

Opt Lett. 2011 Nov 1;36(21):4257-9. doi: 10.1364/OL.36.004257.

DOI:10.1364/OL.36.004257

PMID:22048383

Abstract

We demonstrate optical manipulation of 1 μm sized polystyrene microparticles on silicon nitride microdisk resonator devices using whispering-gallery modes in an integrated optofluidic chip. We demonstrate multiple trapping tracks and extended trapping ranges within single wavelengths through exciting high-order modes. We observe various sets of trapping tracks and ranges through exciting various resonance modes. We switch particle traveling tracks by tuning the laser wavelength to various wavelengths. We also observe microparticles assembling along the trapping tracks.

摘要

我们在集成的光流控芯片中使用氮化硅微盘谐振器的 whispering-gallery 模式演示了对 1 μm 大小的聚苯乙烯微球的光学操纵。我们通过激发高阶模式，在单个波长内实现了多个捕获轨迹和扩展的捕获范围。通过激发各种共振模式，我们观察到了各种捕获轨迹和范围。我们通过将激光波长调谐到不同的波长来切换粒子的行进轨迹。我们还观察到微球沿着捕获轨迹组装。