High-refractive-index measurement with an elastomeric grating coupler

Kocabas, Askin and Ay, Feridun and Dana, Aykutiu and Kiyat, Isa and Aydinli, Atilla (2005) High-refractive-index measurement with an elastomeric grating coupler. Optics Letters, 30 (23). pp. 3150-3152. ISSN 0146-9592

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Abstract:	An elastomeric grating coupler fabricated by the replica molding technique is used to measure the modal indices of a silicon-on-insulator (SOI) planar waveguide structure. Because of the van der Waals interaction between the grating mold and the waveguide, the elastomeric stamp makes conformal contact with the waveguide surface, inducing a periodic index perturbation at the contact region. The phase of the incident light is changed to match the guided modes of the waveguide. The modal and bulk indices are obtained by measuring the coupling angles. This technique serves to measure the high refractive index with a precision better than 10(-3) and allows the elastomeric stamp to be removed without damaging the surface of the waveguide.
Item Type:	Article
Copyright:	© 2005 Optical Society of America
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Integrated Optical MicroSystems (IOMS)
Link to this item:	http://purl.utwente.nl/publications/63180
Official URL:	http://dx.doi.org/10.1364/OL.30.003150
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