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Figure 8 | Nanoscale Research Letters

Figure 8

From: Toward Automatic Label-Free Whispering Gallery Modes Biodetection with a Quantum Dot-Coated Microsphere Population

Figure 8

WGMs in the fluorescence spectra of CdSe/ZnS cQDs coating ≃3 μm polystyrene microspheres. The spectra shown on the same scale are for two different microspheres. A small fluorescence background is observed as well as tiny peaks in each WGM. These peaks are attributed to polar modes, indicating that the spherical symmetry of the microspheres is broken

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