How to understand the negative rotationally averaged two-photon transition strength (DeltaTPA)
I have calculated the two-photon absorption (TPA) of a system using the CCSD response approach. My system has a C2v symmetry. TPAs of three excited states for each irreducible representation have been calculated. For most of the excited states considered, I got the positive DeltaTPAs, while for some excited states, I got the negative DeltaTPAs. The negative DeltaTPA will lead to the negative TPA cross section, then to the negative TPA absorption coefficient (Beta). My question is:
whether the negative Beta can be related to the nonlinear saturable absorption process.
Any references and comments are appreciated.
Use this forum for general discussions of topics that don't fit in the other forums
1 post • Page 1 of 1
Who is online
Users browsing this forum: No registered users and 4 guests