TY - JOUR
T1 - Cavity optomechanics and cooling nanomechanical oscillators using microresonator enhanced evanescent near-field coupling
AU - Anetsberger, G.
AU - Weig, E. M.
AU - Kotthaus, J. P.
AU - Kippenberg, T. J.
N1 - Funding Information:
T.J.K. acknowledges funding by an ERC Starting Grant (SiMP), a Marie Curie Excellence Grant, the NCCR of Quantum Photonics, DARPA (Orchid programme) and the SNF. The MPQ is gratefully acknowledged for support of this work.
PY - 2011/12
Y1 - 2011/12
N2 - Nanomechanical oscillators are at the heart of a variety of precision measurements. This article reports on dispersive radiation coupling of nanomechanical oscillators to the evanescent near-field of toroid optical microresonators. The optomechanical coupling coefficient which reaches values >200 MHz/nm, corresponding to a vacuum optomechanical coupling rate >4 kHz, is characterized in detail and good agreement between experimental, analytical and finite element simulation based values is found. It is shown that both the mode-structure and -patterns of nanomechanical oscillators can be characterized relying solely on Brownian motion. Moreover, it is demonstrated that the radiation pressure interaction can cause self-sustained coherent nanomechanical oscillations at nano-Watt power levels as well as cooling of the nanomechanical oscillator. Finally, the feasibility of coupling nanomechanical motion to two optical modes where the optical mode spacing exactly equals the mechanical resonance frequency is demonstrated for the first time. As shown here, this Raman-type scheme allows both amplification and cooling.
AB - Nanomechanical oscillators are at the heart of a variety of precision measurements. This article reports on dispersive radiation coupling of nanomechanical oscillators to the evanescent near-field of toroid optical microresonators. The optomechanical coupling coefficient which reaches values >200 MHz/nm, corresponding to a vacuum optomechanical coupling rate >4 kHz, is characterized in detail and good agreement between experimental, analytical and finite element simulation based values is found. It is shown that both the mode-structure and -patterns of nanomechanical oscillators can be characterized relying solely on Brownian motion. Moreover, it is demonstrated that the radiation pressure interaction can cause self-sustained coherent nanomechanical oscillations at nano-Watt power levels as well as cooling of the nanomechanical oscillator. Finally, the feasibility of coupling nanomechanical motion to two optical modes where the optical mode spacing exactly equals the mechanical resonance frequency is demonstrated for the first time. As shown here, this Raman-type scheme allows both amplification and cooling.
KW - Cavity optomechanics
KW - Dynamical backaction
KW - Microresonator
KW - Nanomechanical oscillator
KW - Precision measurement
KW - Radiation pressure cooling and amplication
UR - http://www.scopus.com/inward/record.url?scp=82955203754&partnerID=8YFLogxK
U2 - 10.1016/j.crhy.2011.10.012
DO - 10.1016/j.crhy.2011.10.012
M3 - Short survey
AN - SCOPUS:82955203754
SN - 1631-0705
VL - 12
SP - 800
EP - 816
JO - Comptes Rendus Physique
JF - Comptes Rendus Physique
IS - 9-10
ER -