In this paper, two recent advances in silicon ring resonator biosensors are presented. First, we address the problem that due to the high index contrast, small deviations from perfect symmetry lift the degeneracy of the normal resonator mode. This severely deteriorates the quality of the output signal. To address this, we discuss an integrated interferometric approach to give access to the unsplit, high-quality normal modes of the microring resonator. Second, we demonstrate how digital microfluidics can be used for effective fluid delivery to nanophotonic microring resonator sensors fully constructed in SOI.

Date Published: 14 March 2013
PDF: 6 pages
Proc. SPIE 8629, Silicon Photonics VIII, 862905 (14 March 2013); doi: 10.1117/12.2001242

Published in SPIE Proceedings Vol. 8629:
Silicon Photonics VIII
Joel Kubby; Graham T. Reed, Editor(s)