PolyU researchers pioneer 3D micro-printed sensors to advance on-chip biosensing for early disease detection (IMAGE)
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(a) Simulated electric field distribution of WGMs along the radial direction around the edge of a microcavity. The inset shows the simulated electric field in the cross section. (b) Calculated shift of the peak wavelength of WGMs with respect to a change of external refractive index.
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