用FDTD模拟oled时，是怎么计算light extraction efficiency的

- August 2, 2023 at 3:26 am
  
  Jun Luo
  Subscriber
  
  我想请问一下用FDTD模拟oled时，是怎么计算light extraction efficiency的？我已经知道如何算power_radiated，但是我如果直接算power_radiated/dipolepower(f)，并且作图，就只能得到下面的结果，这个efficiency超过了1，我也不知道为什么
- August 2, 2023 at 9:08 am
  
  Jun Luo
  Subscriber
  
  现在这个问题已经解决了，然后我想问的是用dipolepower(f)/sourcepower(f)和用6个monitor组成的trans_box这个analysis group(是用transmission函数算的)算出来的光源发光功率怎么差了好几倍？这两个有什么区别吗
- August 2, 2023 at 10:47 pm
  
  Guilin Sun
  Ansys Employee
  
  sourcepower(f)是指偶极子在均匀介质无限大情况下的辐射功率；
  dipolepower(f) 是偶极子在有环境影响下的实际辐射功率。它受周围介质的影响。
  参见
  dipolepower - Script command
  sourcepower
  - August 3, 2023 at 4:16 am
    
    Jun Luo
    Subscriber
    
    所以请问是怎么计算light extraction efficiency的？能给出案例吗？谢谢！
- August 3, 2023 at 3:17 pm
  
  Guilin Sun
  Ansys Employee
  
  请参考网上OLED仿真的例子，就是远场功率除以偶极子功率。
  一般需要多个仿真。

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