Journal
PHYSICAL REVIEW RESEARCH
Volume 3, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.3.L032022
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Funding
- EPSRC [EP/L015242/1, EP/N031105/1]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant [749709]
- Marie Curie Actions (MSCA) [749709] Funding Source: Marie Curie Actions (MSCA)
- EPSRC [EP/N031105/1] Funding Source: UKRI
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In this study, cooling of center-of-mass motion of a nanoparticle via coupling with the optical field within a high finesse cavity is reported. The resulting coupling is purely quadratic in displacement and results in van der Pol nonlinear damping. Experimental results show that the energy distribution is strongly nonthermal and can be controlled by the nonlinear damping induced by the cavity. This work demonstrates a cavity cooling dominated by this type of coupling across all optomechanical platforms.
We report on cooling of the center-of-mass motion of a nanoparticle via a coupling between its motion and the optical field within a high finesse cavity. The resulting coupling is purely quadratic in displacement and gives rise to a van der Pol nonlinear damping. These dynamics are analogous to conventional parametric feedback where the cavity provides passive feedback without an additional measurement. We show experimentally that as feedback cooling, the resulting energy distribution is strongly nonthermal and can be controlled by the nonlinear damping induced by the cavity. Our work represents a demonstration of a cavity cooling dominated by this type of coupling across all optomechanical platforms.
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