Position-Squared Coupling in a Tunable Photonic Crystal Optomechanical Cavity

Paraiso TK, Kalaee M, Zang L, Pfeifer H, Marquardt F, Painter O (2015)

Publication Status: Published

Publication Type: Journal article

Publication year: 2015

Journal

Physical Review X American Physical Society

Publisher: AMER PHYSICAL SOC

Book Volume: 5

Journal Issue: 4

DOI: 10.1103/PhysRevX.5.041024

Abstract

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.

Authors with CRIS profile

Florian Marquardt Lehrstuhl für Theoretische Physik

Involved external institutions

California Institute of Technology (Caltech) US United States (USA) (US) Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

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). https://dx.doi.org/10.1103/PhysRevX.5.041024

MLA:

Paraiso, Taofiq K., et al. "Position-Squared Coupling in a Tunable Photonic Crystal Optomechanical Cavity." Physical Review X 5.4 (2015).

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