Boundary Conditions

[Saurabh Bhamra]

Which boundary conditions to be checked before simulation a structure. By default what I see when open it is all selected to APML So anyone who can tell what APML, PEC, PMC,PBC means ?

[Amr Elaryan]

Hay Saurabh
PBC is suitable for periodic structures such as grating or nano hole array.
usually, we use it in a direction normal to the direction of propagation. say light propagates in z- direction
then, to show periodicity we can use PBC in x, y directions
APML means anisotropic perfect matched layer and it is suitable for to show that light is almost absorbed and there no reflections.
usually, we use it in direction of propagation.

in some cases one may use either magnetic or electric conductor as a boundary. then PMC or PEC. frankly, i did not use them before.

[Marwa Tharwat]

thanks amr
for the explanation. increasing no of layers in APML increase the effect of the absorption. and that is suitable for plasmonic application

[Amr Elaryan]

thanks marwa

[umer syed]

hi saurabh
OptiFDTD now has options to use Perfect Electrical Conductor (PEC) and Perfect
Magnetic Conductor (PMC) boundary conditions. You can choose which boundaries
use the new conditions, and Anisotropic PML can be used for the remaining
boundaries. With this PEC/PMC/Anisotropic PML combination, the following
simulations may be obtained:
1. Plane wave simulation
2. Domain reduced simulation for symmetric, periodic, or photonic band gap structures

With PBC, you can simulate a simple plane wave simulation, or a periodic layout simulation.
APML is an XML-based markup language for specifying turn-taking, performative, affective,
and intonational aspects of text for speech synthesisis and facial animation..

with regards

[umer syed]

u can also refer to the below mentioned links…

Periodic Boundary Condition for PBG Simulation

PMC/PEC Boundary Conditions and Plane Wave Simulation

[aasif bashir dar]

OptiFDTD now has options to use Perfect Electrical Conductor (PEC) and PerfectMagnetic Conductor (PMC) boundary conditions. You can choose which boundaries use the new conditions, and Anisotropic PML can be used for the remaining boundaries. With this PEC/PMC/Anisotropic PML combination, the followingsimulations may be obtained:

Plane wave simulation
Domain reduced simulation for symmetric, periodic, or photonic band gap structures

OptiFDTD has options to use simplified Periodic Boundary Condition (PBC). It can work with other boundary conditions such as Anisotropic PML, PMC, and PEC.
please visit the links below;

PMC/PEC Boundary Conditions and Plane Wave Simulation

Periodic Boundary Condition for PBG Simulation

with regards

[SAHIL SINGH]

Hi asif Bashir,

Thanks for providing information that OptiFDTD has options to use Perfect Electrical Conductor (PEC) and Perfect Magnetic Conductor (PMC) boundary conditions.. Will surely try to look into the links provided by you..

Regards
Sahil Singh

[Author]

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