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. Author manuscript; available in PMC: 2016 Jan 19.
Published in final edited form as: Anal Chim Acta. 2014 Oct 12;853:95–115. doi: 10.1016/j.aca.2014.10.009

Figure 10.

Figure 10

Example of whispering gallery mode. Glass beads that exhibit a resonance are immobilized with capture antibodies. As the beads come into resonance with the incident wavelength, the increase in intensity can be observed. Analyte addition to the beads causes this resonance wavelength to shift. The change in the wavelength is proportional to analyte concentration. The photograph of the beads in resonance are reprinted with permission from: HA Huckabay, SM Wildgen, RC Dunn, Label-free detection of ovarian cancer biomarkers using whispering gallery mode imaging. Biosensors and Bioelectronics, Volume 45, 2013, 223 – 229. © Elsevier. dx.doi.org/10.1016/j.bios.2013.01.072.