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Issue 14, 2013
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On-chip microlasers for biomolecular detection via highly localized deposition of a multifunctional phospholipid ink

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Abstract

We report on a novel approach to realize on-chip microlasers, by applying highly localized and material-saving surface functionalization of passive photonic whispering gallery mode microresonators. We apply dip-pen nanolithography on a true three-dimensional structure. We coat solely the light-guiding circumference of pre-fabricated poly(methyl methacrylate) resonators with a multifunctional molecular ink. The functionalization is performed in one single fabrication step and simultaneously provides optical gain as well as molecular binding selectivity. This allows for a direct and flexible realization of on-chip microlasers, which can be utilized as biosensors in optofluidic lab-on-a-chip applications. In a proof-of-concept we show how this highly localized molecule deposition suffices for low-threshold lasing in air and water, and demonstrate the capability of the ink-lasers as biosensors in a biotin–streptavidin binding experiment.

Graphical abstract: On-chip microlasers for biomolecular detection via highly localized deposition of a multifunctional phospholipid ink

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Article information


Submitted
31 Jan 2013
Accepted
02 Apr 2013
First published
07 May 2013

Lab Chip, 2013,13, 2701-2707
Article type
Paper

On-chip microlasers for biomolecular detection via highly localized deposition of a multifunctional phospholipid ink

U. Bog, T. Laue, T. Grossmann, T. Beck, T. Wienhold, B. Richter, M. Hirtz, H. Fuchs, H. Kalt and T. Mappes, Lab Chip, 2013, 13, 2701
DOI: 10.1039/C3LC50149C

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