  Photoluminescence (PL) from femtosecond laser modified regions inside
cubic-boron nitride (c-BN) was measured under UV and visible light excitation.
Bright PL at the red spectral range was observed, with a typical excited state
lifetime of $\sim 4$~ns. Sharp emission lines are consistent with PL of
intrinsic vibronic defects linked to the nitrogen vacancy formation (via
Frenkel pair) observed earlier in high energy electron irradiated and
ion-implanted c-BN. These, formerly known as the radiation centers, RC1, RC2,
and RC3 have been identified at the locus of the voids formed by single
fs-laser pulse. The method is promising to engineer color centers in c-BN for
photonic applications.
