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学術論文

Position-Squared Coupling in a Tunable Photonic Crystal Optomechanical Cavity

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/persons/resource/persons201241

Zang,  Leyun
Painter Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201154

Pfeifer,  Hannes
Painter Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201125

Marquardt,  Florian
Marquardt Group, Associated Groups, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201147

Painter,  Oskar
Painter Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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引用

Paraiso, T. K., Kalaee, M., Zang, L., Pfeifer, H., Marquardt, F., & Painter, O. (2015). Position-Squared Coupling in a Tunable Photonic Crystal Optomechanical Cavity. Physical Review X, 5(4):. doi:10.1103/PhysRevX.5.041024.


引用: https://hdl.handle.net/11858/00-001M-0000-002D-6350-6
要旨
We present the design, fabrication, and characterization of a planar silicon photonic crystal cavity in which large position-squared optomechanical coupling is realized. The device consists of a double-slotted photonic crystal structure in which motion of a central beam mode couples to two high-Q optical modes localized around each slot. Electrostatic tuning of the structure is used to controllably hybridize the optical modes into supermodes that couple in a quadratic fashion to the motion of the beam. From independent measurements of the anticrossing of the optical modes and of the dynamic optical spring effect, a position-squared vacuum coupling rate as large as (g) over tilde'/2 pi = 245 Hz is inferred between the optical supermodes and the fundamental in-plane mechanical resonance of the structure at omega(m)/2 pi = 8.7 MHz, which in displacement units corresponds to a coupling coefficient of g'/2 pi = 1 THz/nm(2). For larger supermode splittings, selective excitation of the individual optical supermodes is used to demonstrate optical trapping of the mechanical resonator with measured (g) over tilde'/2 pi = 46 Hz.