Journal article

Reconfigurable microfluidic photonic crystal slab cavities

Cameron LC Smith, Uwe Bog, Snjezana Tomljenovic-Hanic, Michael W Lee, Darran KC Wu, Liam O'Faolain, Christelle Monat, Christian Grillet, Thomas F Krauss, Christian Karnutsch, Ross C McPhedran, Benjamin J Eggleton



We demonstrate the spectral and spatial reconfigurability of photonic crystal double-heterostructure cavities in silicon by microfluidic infiltration of selected air holes. The lengths of the microfluidic cavities are changed by adjusting the region of infiltrated holes in steps of several microns. We systematically investigate the spectral signature of these cavities, showing high Q-factor resonances for a broad range of cavity lengths. The fluid can be removed by immersing the device in toluene, offering complete reconfigurability. Our cavity writing technique allows for tolerances in the infiltration process and provides flexibility as it can be employed at any time after photonic crystal..

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University of Melbourne Researchers


Funding Acknowledgements

The support of the Australian Research Council through its Federation Fellow, Centre of Excellence and Discovery Grant programs is gratefully acknowledged. Additional acknowledgement is given to the support of the School of Physics, University of Sydney, through its Denison Foundation and the International Science Linkages program of the Department of Education, Science and Technology. The silicon samples were fabricated in the framework of the EU-FP6 funded ePIXnet Nanostructuring Platform for Photonic Integration (