What does “index unit” imply when object defined dielectric is used ?

- April 24, 2021 at 9:23 am
  
  nafis16buet
  Subscriber
  
  I am a new Lumerical User. From Lumerical University's tutorial on FTDT, I came to know that we can use an object which has a user-specified refractive index. But below the index text box, there's also an option to select the index units. I am confused at this, since I know that refractive index does not have a unit. nWould you kindly explain what the index units imply? Thanks.n
- April 27, 2021 at 1:27 am
  
  Kyle
  Ansys Employee
  
  nThis is used to define the length units used when a spatially varying index is defined using an equation. There are more details on defining a spatially varying index on the geometry object documentation pages, for example:nn
- April 27, 2021 at 8:26 am
  
  nafis16buet
  Subscriber
  
  Thank you very much, . Your answer is really helpful. Thanks for attaching the documentation link too. n
- April 27, 2021 at 4:50 pm
  
  Kyle
  Ansys Employee
  
  You're welcome !n