Direct Laser Writing Polymer Micro-Resonators for Refractive Index Sensors

Heming Wei; Sridhar Krishnaswamy

doi:10.1109/LPT.2016.2623814

Direct Laser Writing Polymer Micro-Resonators for Refractive Index Sensors

Heming Wei, Sridhar Krishnaswamy

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

A sensitive refractometric polymer micro-resonator sensor is fabricated using direct laser writing. The design consists of two tapered waveguides that can be directly coupled by single mode fibers, two 'Y' splitting waveguides that are combined in a Mach-Zehnder interferometer (MZI) configuration and a micro-cylinder that evanescently couples with the arms of the MZI. The resonant wavelength shifts in response to the refractive index change in the surrounding medium of the micro-cylinder. The strong interaction between the medium and the whispering gallery mode results in a sensitivity of 154.84 nm/RIU (refractive index units), which demonstrates that such micro-resonators can be used for measurements of refractive index of liquids.

Original language	English (US)
Article number	7731136
Pages (from-to)	2819-2822
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	28
Issue number	24
DOIs	https://doi.org/10.1109/LPT.2016.2623814
State	Published - Dec 15 2016

Keywords

Polymer micro-resonator
direct laser writing
integrated optics devices
tapered waveguide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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