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Updated: Mar 23, 2026

$Fabrication of Refractive-index-matched Devices for Biomedical Microfluidics$

Fabrication of Refractive-index-matched Devices for Biomedical Microfluidics

Published on: September 10, 2018

Tunable optofluidic birefringent lens.

D Wee¹, S H Hwang, Y S Song

¹Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea. jaeryoun@snu.ac.kr.

|April 2, 2016

Summary

This summary is machine-generated.

This study demonstrates an optofluidic lens using liquid crystal interfaces. The lens

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Area of Science:

Optofluidics
Liquid Crystal Physics
Microfluidics

Background:

Optofluidic devices offer tunable optical properties.
Liquid-liquid interfaces can be engineered for optical applications.
Nematic liquid crystals (NLCs) exhibit anisotropic optical behavior.

Purpose of the Study:

To demonstrate an optofluidic birefringent lens using hydrodynamic liquid-liquid (L(2)) interfaces.
To investigate the optical characteristics of the L(2) lens under electric field control.
To evaluate the lens' performance using experimental and numerical methods.

Main Methods:

Fabrication of an optofluidic microchannel device.
Utilizing nematic liquid crystal (NLC) and an optically isotropic fluid.
Applying an electric field perpendicular to the flow direction.
Experimental characterization and numerical simulations (hydrodynamic theory of NLCs, ray-tracing model).

Main Results:

The L(2) interface acts as a tunable birefringent lens.
Electric field reorients NLCs, overcoming viscous stress.
Polarization of incident light (s- vs. p-polarized) affects focal length.
Successful evaluation of lens curvatures and focal lengths.

Conclusions:

Optofluidic birefringent lenses can be realized using L(2) interfaces.
Tunable optical properties are achieved through electric field control of NLC orientation.
The developed model accurately predicts the lens' optical behavior.