Next Article in Journal / Special Issue
Fluid Flow Shear Stress Stimulation on a Multiplex Microfluidic Device for Rat Bone Marrow Stromal Cell Differentiation Enhancement
Previous Article in Journal / Special Issue
Fiber-Based, Injection-Molded Optofluidic Systems: Improvements in Assembly and Applications
Article Menu

Export Article

Open AccessArticle
Micromachines 2015, 6(12), 1984-1995; doi:10.3390/mi6121469

Liquid Gradient Refractive Index Microlens for Dynamically Adjusting the Beam Focusing

College of Sciences, Zhejiang University of Technology, Hangzhou 310023, China
*
Author to whom correspondence should be addressed.
Academic Editors: Shih-Kang Fan and Nam-Trung Nguyen
Received: 23 September 2015 / Revised: 1 November 2015 / Accepted: 7 December 2015 / Published: 10 December 2015
(This article belongs to the Special Issue Optofluidics 2015)
View Full-Text   |   Download PDF [3876 KB, uploaded 10 December 2015]   |  

Abstract

An in-plane liquid gradient index (L-GRIN) microlens is designed for dynamically adjusting the beam focusing. The ethylene glycol solution (core liquid) withde-ionized (DI) water (cladding liquid) is co-injected into the lens chamber to form a gradient refractive index profile. The influences of the diffusion coefficient, mass fraction of ethylene glycol and flow rate of liquids on the refractive index profile of L-GRIN microlens are analyzed, and the finite element method and ray tracing method are used to simulate the convection-diffusion process and beam focusing process, which is helpful for the prediction of focusing effects and manipulation of the device. It is found that not only the focal length but the focal spot of the output beam can be adjusted by the diffusion coefficient, mass fraction and flow rate of liquids. The focal length of the microlens varies from 942 to 11 μm when the mass fraction of the ethylene glycol solution varies from 0.05 to 0.4, and the focal length changes from 127.1 to 8 μm by varying the flow rate of the core liquid from 0.5 × 103 to 5 × 103 pL/s when there is no slip between the core and cladding inlet. The multiple adjustable microlens with a simple planar microfluidic structure can be used in integrated optics and lab-on-chip systems. View Full-Text
Keywords: in-plane liquid gradient index (L-GRIN) microlens; optofluidics waveguide; adjustable focal length; convection-diffusion process; beam focusing; finite element method in-plane liquid gradient index (L-GRIN) microlens; optofluidics waveguide; adjustable focal length; convection-diffusion process; beam focusing; finite element method
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Le, Z.; Sun, Y.; Du, Y. Liquid Gradient Refractive Index Microlens for Dynamically Adjusting the Beam Focusing. Micromachines 2015, 6, 1984-1995.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Micromachines EISSN 2072-666X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top