Dear,
when you set the electric filed direction for polarized situation, the
electric field can be represented by a vector perpendicular to the direction of
wave propagation. The magnetic field, too, is a vector perpendicular to the
electric vector and perpendicular to the direction of propagation. If the
direction of the electric field vector is constant, the polarization of the
wave is called linear. There is also elliptically polarized waves ( the
electric vector rotates around the axis of propagation). The elliptical
polarization can be right or left in the opposite direction. If the maximum
amplitude of the electric field is the same regardless of its direction,
polarization is called circular (a case of elliptical polarization).
Karim
Dears:
I am trying to use siesta's optical module to calculate graphene's
optical propertities,but i am confused by the command 'optical.vector'.In the
manual it says :"Optical.Vector (data block): This block contains 3 numbers
that specify the vector direction for either the electric field or light
propagation, for a polarized or unpolarized calculation,respectively. A typical
block might look like:
%block Optical.Vector
1.0 0.0 0.5
%endblock Optical.Vector"
My question is when i set the electric filed direction for polarized
situation,how can i know the propagation direction ? I'm very confused of it
,could you help me ?Thank you very much!
