  We propose a novel optical method to detect the existence of Majorana
fermions at the ends of the semiconductor nanowire via the coupling to an
electron spin trapped on a carbon nanotube resonator under the control of a
strong pump field and a weak probe field. The coupling strength of Majorana
fermion to the spin in the carbon nanotube and the decay rate of the Majorana
fermion can be easily measured from the probe absorption spectrum via
manipulating the spin-mechanical coupling in the suspended\ carbon nanotube.
The scheme proposed here will open a good perspective for its applications in
all-optical controlled Majorana fermion-based quantum computation and quantum
information processing.
