Kerr nonlinearity in cavity-enhanced conical-intersection-driven singlet fission.

We theoretically investigate the impact of Kerr nonlinearity on the cavity-enhanced conical-intersection-driven singlet fission (SF) process using the numerically accurate multiple Davydov Ansatz method. Our results show that the Kerr effect significantly influences the SF dynamics. However, the enhancement of the SF yield requires concerted fine-tuning of the system and cavity parameters and also depends significantly on the initial preparation of the SF system. We argue that optimizing light-matter coupling, Kerr interaction, and initial photon pumping is promising for designing efficient cavity-controlled singlet fission systems for photovoltaic applications.