Tunable Optofluidic Curvature for Micromanipulation

Author:

Verma Gopal12ORCID,Yadav Gyanendra3,Shi Yuzhi4,Zhou Lei‐Ming5,Qiu Cheng‐Wei6,Li Wei1ORCID

Affiliation:

1. GPL Photonics Laboratory State Key Laboratory of Luminescence and Applications Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun Jilin 130033 P. R. China

2. Gopal Photonics Research Laboratory (GPRL) Basti Pandari Mishra Amari Bazar U.P. 272155 India

3. School of Physical Sciences University of Liverpool Liverpool L69 3BX UK

4. Institute of Precision Optical Engineering School of Physics Science and Engineering Tongji University Shanghai 200092 China

5. Department of Optical Engineering Hefei University of Technology Hefei Anhui 230009 China

6. Department of Electrical and Computer Engineering National University of Singapore Singapore 117583 Singapore

Abstract

AbstractManipulating micro/nanoparticles on deformed liquid interfaces induced by radiation pressure presents an active, non‐invasive, and contactless method. However, a significant challenge arises due to the relatively small magnitude of the radiation force in normal incidence. Nevertheless, this technique holds immense utility in controlling particle movement at interfaces, with numerous applications in both physical and biological contexts. To overcome this, the peculiar properties of total internal reflection (TIR) in retro‐reflection mode are expoited to create a high amplitude bulge on the water surface, which can migrate radius particles as forcibly as the traditional micro‐post paradigm. The bulge height is measured using an interferometric technique, and the underlying physics are demonstrated using an imitated particle with a capillary charge. By shining two pump lasers, an interface shape is created with increasing complexity, and the relative pump laser intensity is tuned to migrate particles in the desired direction. The method provides a non‐invasive and contactless way to remotely actuate almost all types of micro/nanoparticles at the liquid surface.

Funder

Innovative Research Group Project of the National Natural Science Foundation of China

Publisher

Wiley

Subject

Condensed Matter Physics,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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