Hi 2 All, I want to know that can we calculate the dielectric constant , electro-optic coefficient as a function of external electric field. Like if i want to increase electric field in Z direction gradually , what is change in dielectric constant , electro optic properties and non linear optical properties???? which parameters to apply ?? which inputs to be added ???
Sir what i thaink, i have to do the following things 1) Scf with these extra parameters tefield=.true., edir = 3 (Z dierection) emaxpos= 0.5D0,(it means that electric field is maximum at c/2 where c is the lattice constant along z axis) eopreg=0.1D0 (I dident get the Zone meaning) eamp= 1.9 *(10 raise to power -15) V/m,( only this electric field i have to vary and calculate optical properties at diffrent values) 2) pw.x with calculation =phonon with above same parameters 3) Ph.x (phonon at gamma) Please advice, Thanks, Take care Dev Sharma, Univeristy of Delhi -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.democritos.it/pipermail/pw_forum/attachments/20090928/9044d23c/attachment.htm