Print Email Facebook Twitter All-optical on-chip sensor for high refractive index sensing Title All-optical on-chip sensor for high refractive index sensing Author Liu, Y. Salemink, H.W.M. Faculty Applied Sciences Department Kavli Institute of Nanoscience Date 2015-01-22 Abstract A highly sensitive sensor design based on two-dimensional photonic crystal cavity is demonstrated. The geometric structure of the cavity is modified to gain a high quality factor, which enables a sensitive refractive index sensing. A group of slots with optimized parameters is created in the cavity. The existence of the slots enhances the light–matter interactions between confined photons and analytes. The interactions result in large wavelength shifts in the transmission spectra and are denoted by high sensitivities. Experiments show that a change in refractive index of ?n???0.12 between water and oil sample 1 causes a spectral shift of 23.5?nm, and the spectral shift between two oil samples is 5.1?nm for ?n???0.039. These results are in good agreement with simulations, which are 21.3 and 7.39?nm for the same index changes. Subject refractive indexphotonic crystalsphotonssiliconcavitation To reference this document use: http://resolver.tudelft.nl/uuid:aad01a4c-fed5-4f77-b9ed-492b9a14a2fa Publisher American Institute of Physics ISSN 0003-6951 Source https://doi.org/10.1063/1.4906576 Source Applied Physics Letters, 106 (3), 2015 Part of collection Institutional Repository Document type journal article Rights (c) 2015 Author(s)All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. Files PDF Liu_2015.pdf 1000.72 KB Close viewer /islandora/object/uuid:aad01a4c-fed5-4f77-b9ed-492b9a14a2fa/datastream/OBJ/view