Feedback cooling of a strained GaAs micromechanical beam resonator

Takayuki Watanabe, Koji Onomitsu, Hiroshi Yamaguchi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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.

Original languageEnglish
Article number065201
JournalApplied Physics Express
Issue number6
Publication statusPublished - 2010 Jun


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