Prathamesh S. Donvalkar, F. Barbosa, X. Ji, Yoshitomo Okawachi, Rees Mcnally, A. Farsi, A. Klenner, M. Lipson, A. Gaeta
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Broadband frequency comb generation in the near-visible using higher-order modes in silicon nitride microresonators
We demonstrate frequency comb generation in the visible optical spectrum via excitation of higher-order modes in silicon nitride microresonators. Anomalous group-velocity dispersion from the higher-order mode allows for broadband comb generation spanning 45 THz.