Extended Data Fig. 2: Dispersed spectra of the \(\widetilde{A}/\widetilde{B}\to \widetilde{X}\) transitions of CaOPh-x species.
From: Bottom-up approach to making larger hydrocarbon molecules capable of optical cycling
a-b, CaOPh-CH3. c-d, CaOPh-\({\rm{C}}{({{\rm{CH}}}_{3})}_{3}\). e-f, CaOPh-Ad. g-h, CaOPh-1diA. i-j, CaOPh-4diA. The black curves and red dashed curves show the experimental spectra and the Voigt profile fits, respectively. The blue sticks indicate the theoretical predictions of the intensity ratios and harmonic frequencies of the vibrational decays. The vibrational decays are labeled with notation \({n}_{i}^{j}\), where n represents the vibrational mode νn, i and j are the vibrational quantum numbers in the ground and excited states, respectively. * indicates the calcium atomic lines induced by the laser ablation of the calcium/CaH2 targets.
