Learning Forum

[sharifshuvocu19702012]

I want to design a hybrid plasmonic waveguide based biosensor.Can someone help me with these?also i have to calculate sensitivity.

I have already made a design.But it is not giving me the expected graph.Help me regarding this.

[Guilin Sun]

Could you please elaborate more regarding to the results you want? what source you are using? it seems like a plane wave but the structure seems not periodic. This can only be an approximation. Usually plan wave should match with periodic boundary conditions. Please consider it carefully.

We have examples for your reference:

https://optics.ansys.com/hc/en-us/articles/360042089353-Resonant-bio-sensor-grating 

https://optics.ansys.com/hc/en-us/articles/360042833173-Thermally-tuned-waveguide-sensor

https://optics.ansys.com/hc/en-us/articles/11036662048787-Fiber-Bragg-Grating-Temperature-Sensor

You can certainly simulate the sensitivity.

 

 

[sharifshuvocu19702012]

I am not using plane wave source.I am using a mode source.

[sharifshuvocu19702012]

I want to calculate effective mode index,normalized guided power,propagation distance,surface and bulk sensitivity.and also figure of merit.

 

[Guilin Sun]

effective index can be found from the mode source;

Not sure what is your definition of the normalized guided power. You can use port to get transmission for each mode you want;

also not sure what "propagation distance" means, since usually it is what you set;

"surface and bulk sensitivity" what are the math and physical defintions? FDTD gives you field components and power quantity. The rest is up to you for calculation from definition;

"Figure of merit" is what you define and calculate.