Photonic crystal slab sensor with enhanced surface area

Christopher Kang; Christopher T. Phare; Yurii A. Vlasov; Solomon Assefa; Sharon M. Weiss

doi:10.1364/OE.18.027930

Photonic crystal slab sensor with enhanced surface area

Christopher Kang, Christopher T. Phare, Yurii A. Vlasov, Solomon Assefa, Sharon M. Weiss

Research output: Contribution to journal › Article › peer-review

Abstract

In this work, we demonstrate improved molecular detection sensitivity for silicon slab photonic crystal cavities by introducing multiplehole defects (MHDs), which increase the surface area available for labelfree detection without degrading the quality factor. Compared to photonic crystals with L3 defects, adding MHDs into photonic crystal cavities enabled a 44% increase in detection sensitivity towards small refractive index perturbations due to surface monolayer attachment of a small aminosilane molecule. Also, photonic crystals with MHDs exhibited 18% higher detection sensitivity for bulk refractive index changes.

Original language	English (US)
Pages (from-to)	27930-27937
Number of pages	8
Journal	Optics Express
Volume	18
Issue number	26
DOIs	https://doi.org/10.1364/OE.18.027930
State	Published - Dec 20 2010
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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AU - Phare, Christopher T.

AU - Vlasov, Yurii A.

AU - Assefa, Solomon

AU - Weiss, Sharon M.

PY - 2010/12/20

Y1 - 2010/12/20

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AB - In this work, we demonstrate improved molecular detection sensitivity for silicon slab photonic crystal cavities by introducing multiplehole defects (MHDs), which increase the surface area available for labelfree detection without degrading the quality factor. Compared to photonic crystals with L3 defects, adding MHDs into photonic crystal cavities enabled a 44% increase in detection sensitivity towards small refractive index perturbations due to surface monolayer attachment of a small aminosilane molecule. Also, photonic crystals with MHDs exhibited 18% higher detection sensitivity for bulk refractive index changes.

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Photonic crystal slab sensor with enhanced surface area

Abstract

ASJC Scopus subject areas

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