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Proceedings Paper

Waveguide-based optofluidics
Author(s): Christian Karnutsch; Snjezana Tomljenovic-Hanic; Christelle Monat; Christian Grillet; Peter Domachuk; Ross McPhedran; Benjamin J. Eggleton; Liam O'Faolain; Thomas F. Krauss; Sanshui Xiao; Niels A. Mortensen
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Paper Abstract

Optofluidic devices exploit the characteristics of liquids to achieve a dynamic adaptation of their optical properties. The use of liquids allows for functionalities of optical elements to be created, reconfigured or tuned. We present an overview of our work on fluid-control of optical elements and highlight the benefits of an optofluidic approach, focusing on optofluidic cavities created in silicon photonic crystal (PhC) waveguide platforms. These cavities can be spatially and spectrally reconfigured, thus allowing a dynamic control of their optical characteristics. PhC cavities are major building blocks in many applications, from microlasers and biomedical sensor systems to optical switches and integrated circuits. In this paper, we show that PhC microcavities can be formed by infusing a liquid into a selected section of a uniform PhC waveguide and that the optical properties of these cavities can be tuned and adapted. By taking advantage of the negative thermo-optic coefficient of liquids, we describe a method which renders PhC cavities insensitive to temperature changes in the environment. This is only one example where the fluid-control of optical elements results in a functionality that would be very hard to realize with other methods and techniques.

Paper Details

Date Published: 16 February 2010
PDF: 15 pages
Proc. SPIE 7606, Silicon Photonics V, 760615 (16 February 2010);
Show Author Affiliations
Christian Karnutsch, Hochschule Karlsruhe (Germany)
Snjezana Tomljenovic-Hanic, The Univ. of Sydney (Australia)
Christelle Monat, The Univ. of Sydney (Australia)
Christian Grillet, The Univ. of Sydney (Australia)
Peter Domachuk, The Univ. of Sydney (Australia)
Ross McPhedran, The Univ. of Sydney (Australia)
Benjamin J. Eggleton, The Univ. of Sydney (Australia)
Liam O'Faolain, Univ. of St. Andrews (United Kingdom)
Thomas F. Krauss, Univ. of St. Andrews (United Kingdom)
Sanshui Xiao, Technical Univ. of Denmark (Denmark)
Niels A. Mortensen, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 7606:
Silicon Photonics V
Joel A. Kubby; Graham T. Reed, Editor(s)

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