Suppression of quantum-radiation-pressure noise in an optical spring
Recent advances in micro- and nanofabrication techniques have led to corresponding improvement in the performance of optomechanical systems, which provide a promising avenue towards quantum-limited metrology and the study of quantum behavior in macroscopic mechanical objects. One major impediment to reaching the quantum regime is thermal excitation, which can be overcome for a sufficiently high mechanical quality factor Q. Here, we propose a method for increasing the effective Q of a mechanical resonator by stiffening it via the optical spring effect exhibited by linear optomechanical systems and show how the associated quantum-radiation-pressure noise can be evaded by sensing and feedback control. In a parameter regime that is attainable with current technology, this method allows for realistic quantum cavity optomechanics in a frequency band well below that which has been realized thus far.
© 2013 American Physical Society. Received 3 February 2013; revised manuscript received 30 July 2013; published 4 September 2013. The authors would like to thank Matt Evans and Sheila Dwyer for several illuminating discussions. We also gratefully acknowledge support from the National Science Foundation. Specifically, W.Z.K. and R.X.A. were supported by NSF Grant No. PHY-0757058; H.M. and Y.C. were supported by NSF Grant No. PHY-1068881 and CAREER Grant No. PHY-0956189; and T.C. was supported by NSF CAREER Grant No. PHY-1150531.
Published - PhysRevA.88.033805.pdf
Submitted - Quantum_radiation.pdf