Silicon photonic micro-disk resonators for label-free biosensing

Silicon photonic biosensors are highly attractive for multiplexed Lab-on-Chip systems. Here, we characterize the sensing performance of 3 µm TE-mode and 10 µm dual TE/TM-mode silicon photonic micro-disk resonators and demonstrate their ability to detect the specific capture of biomolecules. Our expe...

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Bibliographic Details
Published in:Optics express 2013-04, Vol.21 (7), p.7994-8006
Main Authors: Grist, Samantha M, Schmidt, Shon A, Flueckiger, Jonas, Donzella, Valentina, Shi, Wei, Talebi Fard, Sahba, Kirk, James T, Ratner, Daniel M, Cheung, Karen C, Chrostowski, Lukas
Format: Article
Language:English
Subjects:
Biopolymers - analysis
Biosensing Techniques - instrumentation
Equipment Design
Equipment Failure Analysis
Miniaturization
Refractometry - instrumentation
Silicon - chemistry
Staining and Labeling
Surface Plasmon Resonance - instrumentation
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Summary:Silicon photonic biosensors are highly attractive for multiplexed Lab-on-Chip systems. Here, we characterize the sensing performance of 3 µm TE-mode and 10 µm dual TE/TM-mode silicon photonic micro-disk resonators and demonstrate their ability to detect the specific capture of biomolecules. Our experimental results show sensitivities of 26 nm/RIU and 142 nm/RIU, and quality factors of 3.3x10(4) and 1.6x10(4) for the TE and TM modes, respectively. Additionally, we show that the large disks contain both TE and TM modes with differing sensing characteristics. Finally, by serializing multiple disks on a single waveguide bus in a CMOS compatible process, we demonstrate a biosensor capable of multiplexed interrogation of biological samples.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.007994