<?xml version="1.0" encoding="UTF-8"?> <article key="pdf/12000" mdate="2012-11-29 00:00:00"> <author>V. Zamora and Z. Zhang and A. Meldrum</author> <title>FluorescentCore Microcavities Based On Silicon Quantum Dots for Oil Sensing Applications</title> <pages>1510 - 1515</pages> <year>2012</year> <volume>6</volume> <number>11</number> <journal>International Journal of Nuclear and Quantum Engineering</journal> <ee>https://publications.waset.org/pdf/12000</ee> <url>https://publications.waset.org/vol/71</url> <publisher>World Academy of Science, Engineering and Technology</publisher> <abstract>The compatibility of optical resonators with microfluidic systems may be relevant for chemical and biological applications. Here, a fluorescentcore microcavity (FCM) is investigated as a refractometric sensor for heavy oils. A highindex film of silicon quantum dots (QDs) was formed inside the capillary, supporting cylindrical fluorescence whispering gallery modes (WGMs). A set of standard refractive index oils was injected into a capillary, causing a shift of the WGM resonances toward longer wavelengths. A maximum sensitivity of 240 nmRIU (refractive index unit) was found for a nominal oil index of 1.74. As well, a sensitivity of 22 nmRIU was obtained for a lower index of 1.48, more typical of fuel hydrocarbons. Furthermore, the observed spectra and sensitivities were compared to theoretical predictions and reproduced via FDTD simulations, showing in general an excellent agreement. This work demonstrates the potential use of FCMs for oil sensing applications and the more generally for detecting liquid solutions with a high refractive index or high viscosity. </abstract> <index>Open Science Index 71, 2012</index> </article>