Enhanced detection limit by dark mode perturbation in 2D photonic crystal slab refractive index sensors

We demonstrate for the first time a 300nm thick, 300μm × 300μm 2D dielectric photonic crystal slab membrane with a quality factor of 10,600 by coupling light to slightly perturbed dark modes through alternating nano-hole sizes. The newly created fundamental guided resonances greatly reduce nano-fabr...

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Bibliographic Details
Published in:Optics express 2013-12, Vol.21 (25), p.31698-31712
Main Authors: Nicolaou, Costa, Lau, Wah Tung, Gad, Raanan, Akhavan, Hooman, Schilling, Ryan, Levi, Ofer
Format: Article
Language:English
Subjects:
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Models, Theoretical
Photometry - instrumentation
Refractometry - instrumentation
Surface Plasmon Resonance - instrumentation
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Summary:We demonstrate for the first time a 300nm thick, 300μm × 300μm 2D dielectric photonic crystal slab membrane with a quality factor of 10,600 by coupling light to slightly perturbed dark modes through alternating nano-hole sizes. The newly created fundamental guided resonances greatly reduce nano-fabrication accuracy requirements. Moreover, we created a new layer architecture resulting in electric field enhancement at the interface between the slab and sensing regions, and spectral sensitivity of >800 nm/RIU, that is, >0.8 of the single-mode theoretical upper limit of spectral sensitivity.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.031698