Correction to: Plasmonics (2020) 15:543–549

https://doi.org/10.1007/s11468-019-01083-9

The original version of this article unfortunately contained a mistake in the “Acknowledgement” section. As for an important condition required by the first author’s affiliation so that the research project can attain the research grant support, the sentence that acknowledges the first author’s affiliation must thus be stated appropriately in the article. The corrected ‘Acknowledgement’ statement is given below.