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. 2018 Nov 21;8:17176. doi: 10.1038/s41598-018-35647-2

Figure 2.

Figure 2

Transmission spectra of the µIMZI with the cavity diameter d = 50 µm, where (a) shows a response to RI changes and (b) shows the evolution of the Al2O3 film thickness (initially t = 154 nm) with its etching process recorded for a water-filled cavity. The spectrum before the deposition was given for reference. Arrows indicate the shift of the minimum induced by each procedure.