[Poonam JindalParticipant]

Hi Scott
Yes, I have tried to reinstall the evaluation version. That is why I am saying that I have lost two chances of installing the evaluation version. Both times the same error message pops up.
I have been using an older version of the software earlier. Some time back, I have installed the evaluation version of optiFDTD and made some design files.
But now when I installed the evaluation version for second and third time, the above attached error message is there.

[Poonam JindalParticipant]

Hi Scott
Yes, I have tried to reinstall the evaluation version. That is why I am saying that I have lost two chances of installing the evaluation version. Both times the same error message pops up.
I have been using an older version of the software earlier. Some time back, I have installed the evaluation version of optiFDTD and made some design files.
But now when I installed the evaluation version for second and third time, the above attached error message is there.

[Poonam JindalParticipant]

Thank u so much for the response.

Yes, the design is same as I send you and that of the results. The only difference is that I have inserted the observation areas in the design as per your previous comments.
The colour scale was saturated. I have adjusted the scale and got better propagation.

[Poonam JindalParticipant]

Thank u so much for the response.

Yes, the design is same as I send you and that of the results. The only difference is that I have inserted the observation areas in the design as per your previous comments.
The colour scale was saturated. I have adjusted the scale and got better propagation.

[Poonam JindalParticipant]

Ok Sir,

I am also attaching the jpeg file of analyzer.

[Poonam JindalParticipant]

Ok Sir,

I am also attaching the jpeg file of analyzer.

[Poonam JindalParticipant]

Hi Scott,

Thanks for the response.

1. I have done the 2D simulation for the designed structure.
2. I have also placed the input source outside the structure.
3. As per your suggestion, I have broaden the input waveguide by removing a row of rods. But again a lot of power is leaking out from the waveguide as shown in the attached file.
4. I have also simulated the structure at different mesh sizes like 0.04, 0.038, 0.01 etc. but getting almost same results each time.

I am getting very confused. Please guide me on what am I doing wrong?

[Poonam JindalParticipant]

Hi Scott,

Thanks for the response.

1. I have done the 2D simulation for the designed structure.
2. I have also placed the input source outside the structure.
3. As per your suggestion, I have broaden the input waveguide by removing a row of rods. But again a lot of power is leaking out from the waveguide as shown in the attached file.
4. I have also simulated the structure at different mesh sizes like 0.04, 0.038, 0.01 etc. but getting almost same results each time.

I am getting very confused. Please guide me on what am I doing wrong?

[Poonam JindalParticipant]

Hi Scott
Thanks a lot for your response.
I have seen all the suggestions and will work upon it. Further, I have some doubts as follows-
1. Regarding the relation between injected field and waveguide dimensions.
2. How to adjust the mesh size (resolution) in relation to the source wavelength.
3. What changes in the waveguide parameters I need to do to get the result beyond 1.4um (else suggest the relation between them).

I will be very thankful to you as this will be really helpful in my research.
Hoping for a favorable reply.
Poonam

[Poonam JindalParticipant]

Hi Scott
Thanks a lot for your response.
I have seen all the suggestions and will work upon it. Further, I have some doubts as follows-
1. Regarding the relation between injected field and waveguide dimensions.
2. How to adjust the mesh size (resolution) in relation to the source wavelength.
3. What changes in the waveguide parameters I need to do to get the result beyond 1.4um (else suggest the relation between them).

I will be very thankful to you as this will be really helpful in my research.
Hoping for a favorable reply.
Poonam

[Poonam JindalParticipant]

Hi Scott

Thanks for the response.
I am attaching the fdt file for your reference.

[Poonam JindalParticipant]

Hi Scott

Thanks for the response.
I am attaching the fdt file for your reference.

[Poonam JindalParticipant]

Thank u so much for your response Sir. I am getting a PBG for my design as 0.269228 c/a to 0.453655 c/a on the scale of wave vector k. Firstly I wanted to know how can I calculate wavelength range from this value (a = 1 micro meter the default setting). Operating wavelength of my design is 1430nm.
Secondly, How can i change the r/a ratio. I am taking r as the radius of air holes and is equal to 0.3a.
Can i optimize the value of lattice constant ‘a’ to get maximum transmission efficiency.

[Poonam JindalParticipant]

Dear Sir

I am resending the FDT file of my design.

Attachments:

1. 40-rods-modified1.fdt

[Poonam JindalParticipant]

Dear Sir

Thank you so much for clearing my doubt on output efficinecy. My aim is to optimize the design of 2D Photonic Crystal based Power splitter in terms of output efficiency. I am injecting the input power at 1550 nm and have introduced certain defects in the crystal structure to get maximum efficiency. Refractive index of the substrate is 3.47 and air holes are injected in it with a refractive index of 1. the size of the splitter is 10×10 micrometer.the air hole radius is 0.2 and radius of defects is 0.1.
The problem is that I am not getting teh desired efficiency at 1550nm. I wanted to know where I am lagging.