  We present a temperature enhanced photothermal cooling scheme in a
micro-cantilever based FP cavity. Experiments at various temperatures show a
temperature dependence of photothermal cooling efficiency. And approximate one
order of improvement on the cooling efficiency is achieved experimentally when
the temperature decreases from 298 K to 100 K. Numerical analysis reveals that
the dramatic change of the cooling efficiency is attributed to the temperature
dependent dynamics of the photothermal backaction. A high efficient cooling can
be achieved by controlling the temperature for an optimized the dynamics of
photothermal backaction.
