We incorrectly calculated and marked the whispering-gallery-mode (WGM) order of the ring cavity in our manuscript. Here, we provide the correct value of WGM orders. It should be mentioned that the main results, techniques, and conclusions presented in the published paper would not be affected.
©2013 Optical Society of America
In section 2&3 of our manuscript , we incorrectly calculated and marked the whispering-gallery-mode (WGM) order of the ring cavity. In , the WGM order is obtained from electric intensity distribution () 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 (). Here the correct WGM orders are summarized as:
|Resonant frequency||Incorrect WGM order||Correct WGM order||OAM order|
The authors regret the errors, although these do not change the techniques and conclusions presented in .