Searches for additional scalars with two photons in the final state at CMS

Although the Higgs boson discovered at the LHC is so far compatible with the Standard Model Higgs boson within the experimental uncertainties, there is still room for extensions of the Standard Model. Some beyond Standard Models, such as the Two Higgs Doublet Model and the Next-to-Minimal Supersymmetric Standard Model, can predict additional Higgs bosons with rich and interesting phenomenologies. Some latest results of the searches for additional Higgs bosons or scalars with at least two photons included in the final state at CMS are presented. The searches include a search for a standard model-like Higgs boson in the mass range between 70 and 110 $\GeV$ in the diphoton final state, for a Higgs boson decaying into scalar(s) with at least one scalar decaying into two photons, and for a high-mass scalar in the exclusive diphoton production via photon-photon fusion with tagged protons. No evidence for the existence of extra scalars is found so far. Some of these searches are performed for the first time based on all LHC data collected by CMS at a center-of-mass energy of 13 TeV.