Yambo Community Forum

Dear all，

For low-dimensional periodic materials (1D or 2D), can Yambo calculate the BSE absorption spectrum under circularly polarized light?

Best,
sunxl

Dear sunxl,
yes, it is possible.

If you put in the input file, you will get both eps_ii and eps_ij, from which you can reconstruct the absorption of circular light.

For setting the two directions as "i=x" and "j=y" for example , you can use and Best,
D.

Dear Davide,

Thank you for your patient response.

1、If I want to calculate the absorption spectra under different circularly polarized light, then how should the left-handed and right-handed circularly polarized lights be set up respectively?

2、I studied the tutorial on calculating the magneto-optical Kerr effect. It mentioned that when setting BLongDir = 100, one can obtain eps_xx, as well as the off-diagonal element eps_xy. However, for a general system, eps_yy and eps_yx also need to be calculated. Should BLongDir be set to 010?

3、If it is a non-magnetic chiral structure, by setting BSEprop="abs kerr" and following the calculation process of the magneto-optical Kerr effect tutorial, calculate the absorption spectra under left-handed and right-handed circularly polarized light respectively, is the result obtained the circular dichroism caused by the chiral structure?

Best,
sunxl