Active feedback cooling is an important technique for achieving the quantum ground state in micro/nanomechanical resonators. We studied the effect of tensile strain on the achievable minimum temperature and quantum occupation number by fabricating a doubly clamped beam resonator from a GaAs/InAlAs strained layer heterostructure. Despite the increase of the minimum temperature, we demonstrate that the occupation number can be decreased by applying tensile strain to the mechanical resonator.
ASJC Scopus subject areas
- Physics and Astronomy(all)