acoustotreams.ScalarPlaneWaveBasisByComp.diffr_orders

classmethod ScalarPlaneWaveBasisByComp.diffr_orders(kpar, lattice, bmax)[source]

Creates a basis set for a two-dimensional periodic system.

The reciprocal lattice of the given lattice is used to determine all diffraction orders within the defined maximum radius of the circle in the reciprocal space.

Example

>>> acoustotreams.ScalarPlaneWaveBasisByComp.diffr_orders([0, 0], acoustotreams.Lattice.square(2 * np.pi), 1)
ScalarPlaneWaveBasisByComp(
    kx=[ 0.  0.  0.  1. -1.],
    ky=[ 0.  1. -1.  0.  0.],
)
Parameters:

  • kpar (float) – In-plane wave-vector components (rad/m). Ideally, they are defined within the first Brillouin zone (use misc.firstbrillouin2d()).

  • lattice (acoustotreams.Lattice or float) – Lattice definition or pitch.

  • bmax (float) – Maximum length of reciprocal-lattice vectors that defines a maximum momentum transfer with respect to kpar.