Erratum: Encoding and decoding of orbital angular momentum for wireless optical interconnects on chip

In section 2&3 of our manuscript [1], we incorrectly calculated and marked the whispering-gallery-mode (WGM) order of the ring cavity. In [1], the WGM order is obtained from electric intensity distribution (${\left|E\right|}^2$) along the ring. However, the WGM order represents the cycle number of electric field distribution along the ring so that it should be calculated from the amplitude field distribution ($E$). Here the correct WGM orders are summarized as:

The authors regret the errors, although these do not change the techniques and conclusions presented in [1].