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Transmission equation used in FDTD and MODE

- March 13, 2023 at 2:56 am
  
  gpsar
  Subscriber
  
  I know the equation Lumerical uses for transmission is shown here
  https://optics.ansys.com/hc/en-us/articles/360034405354-transmission-Script-command but when you solve for the Poynting vector what is the result? Does P = |E|^2?
- March 14, 2023 at 12:47 am
  
  Amrita Pati
  Ansys Employee
  
  Hello,
  
  The equation for Poynting vector is given as: $\begin{matrix} P = E \times H^{*} \end{matrix}$
  Regards,
  Amrita
- March 14, 2023 at 10:24 am
  
  gpsar
  Subscriber
  
  Hi Amrita,
  Thanks for your answer. But what is the result of integrating the Poynting vector, since you are only taking the real part?
  - March 14, 2023 at 3:32 pm
    
    Amrita Pati
    Ansys Employee
    
    Hello,
    
    The Poynting vector is integrated over the monitor surface to determine the total power through the monitor cross-section. The total power is then normalized to the source power to calculate the transmission.
    
    More details can be found on the following page:
    Integrating the Poynting Vector
    
    Regards,
    Amrita

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