  Single bubble sonoluminescence has been experimentally produced through a
novel approach of optimized sound excitation. A driving consisting of a first
and second harmonic with selected amplitudes and relative phase results in an
increase of light emission compared to sinusoidal driving. We achieved a raise
of the maximum photo current of up to 300% with the two-mode sound signal.
Numerical simulations of multimode excitation of a single bubble are compared
to this result.
