The analysis group sets the monitor just on the absorbing structure, not the whole region to save memory. The monitor size does not have any relation with the source power. The source power is only related to the source amplitude and the area.
This example just uses another method to get the absorption power density. Usually, the analysis group just normalizes to the source power its power, so the result will be similar to 1Watt. In HEAT simulation one can modify the scale factor:
In the above screen shot, 55 means the actual optical power absorbed is 55 times larger in HEAT than the original data from FDTD.
If in FDTD it is normalized to the source power its self, then this scale factor will the actual optical power used in HEAT. eg, 0.001 will mean it is 1mW;1e-6 means 1uW and so on.
So you can do the power scaling quite easily either in FDTD or in HEAT, once you know what are used to normalize.
This example just uses another method to get the absorption power density. Usually, the analysis group just normalizes to the source power its power, so the result will be similar to 1Watt. In HEAT simulation one can modify the scale factor:
In the above screen shot, 55 means the actual optical power absorbed is 55 times larger in HEAT than the original data from FDTD.If in FDTD it is normalized to the source power its self, then this scale factor will the actual optical power used in HEAT. eg, 0.001 will mean it is 1mW;1e-6 means 1uW and so on.
So you can do the power scaling quite easily either in FDTD or in HEAT, once you know what are used to normalize.
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