when the sound barrier is broken,a series of concentric waves of sound is produced.Does it mean when the speed of light barrier is broken,a ripple of photons are created in the space-time fabric?
The light barrier cannot be broken in vacuum as you should know by now. c is the velocity of light in vacuum.
But, within a medium light can have a lower phase velocity in the medium, depending on the index of refraction of the medium. There the barrier phenomenon can appear and it is called Cherenkov radiation.
This phenomenon has practical applications as in particle detectors etc.
Speed of light in the vacuum cannot be exceeded by matter, so the barrier cannot be broken.
Speed of light in medium, however, may be surpassed by a charged particle also moving in that medium, resulting in Cherenkov radiation. But it is hardly something as "ripple in the space-time fabric".