Re: [MPB-discuss] Is it possible to simulate the interface of two lattices? Similar to a 1D lattice with internal "structure"

[Steven G. Johnson]

> On Jul 27, 2017, at 4:40 PM, Chris Flower  wrote:
> I'm interested in doing bandstructure calculations for a photonic crystal of 
> two different lattice structures. For instance, imagine (in 2D) a lattice of 
> rods of radius R1 for all lattice sites with y>0, and radius R2 for all 
> lattice sites with y<0. (With R1 != R2 of course.)
> 
> In my mind, this would require simulating a 1D lattice, where the unit cell 
> is infinite in the y direction, periodic in x. This is quite similar to 
> previous discussions on mpb-discuss about simulating bragg reflectors. The 
> main difference with the bragg reflector case is that there is no internal 
> "structure" in the y direction in the unit cell, aka it is uniform in y.
> 
> Is a structure like this possible to create in MPB? Please let me know if my 
> description is unclear at all. 


MPB could calculate things like surface states localized at the interface (via 
a supercell calculation).It can't calculate things like reflection 
coefficients.___
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[MPB-discuss] Is it possible to simulate the interface of two lattices? Similar to a 1D lattice with internal "structure"

[Chris Flower]

Hello everyone,

I'm interested in doing bandstructure calculations for a photonic crystal
of two different lattice structures. For instance, imagine (in 2D) a
lattice of rods of radius R1 for all lattice sites with y>0, and radius R2
for all lattice sites with y<0. (With R1 != R2 of course.)

In my mind, this would require simulating a 1D lattice, where the unit cell
is infinite in the y direction, periodic in x. This is quite similar to
previous discussions on mpb-discuss about simulating bragg reflectors. The
main difference with the bragg reflector case is that there is no internal
"structure" in the y direction in the unit cell, aka it is uniform in y.

Is a structure like this possible to create in MPB? Please let me know if
my description is unclear at all.

Thanks very much,
Chris
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