Gallium Phosphide as a Piezoelectric Platform for Quantum Optomechanics

Robert Stockill, Moritz Forsch, Grégoire Beaudoin, Konstantinos Pantzas, Isabelle Sagnes, Rémy Braive, and Simon Gröblacher
Phys. Rev. Lett. 123, 163602 – Published 17 October 2019
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Abstract

Recent years have seen extraordinary progress in creating quantum states of mechanical oscillators, leading to great interest in potential applications for such systems in both fundamental as well as applied quantum science. One example is the use of these devices as transducers between otherwise disparate quantum systems. In this regard, a promising approach is to build integrated piezoelectric optomechanical devices that are then coupled to microwave circuits. Optical absorption, low quality factors, and other challenges have up to now prevented operation in the quantum regime, however. Here, we design and characterize such a piezoelectric optomechanical device fabricated from gallium phosphide in which a 2.9 GHz mechanical mode is coupled to a high quality factor optical resonator in the telecom band. The large electronic band gap and the resulting low optical absorption of this new material, on par with devices fabricated from silicon, allows us to demonstrate quantum behavior of the structure. This not only opens the way for realizing noise-free quantum transduction between microwaves and optics, but in principle also from various color centers with optical transitions in the near visible to the telecom band.

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  • Received 16 July 2019

DOI:https://doi.org/10.1103/PhysRevLett.123.163602

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalGeneral PhysicsCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Robert Stockill1,*, Moritz Forsch1,*, Grégoire Beaudoin2, Konstantinos Pantzas2, Isabelle Sagnes2, Rémy Braive2,3, and Simon Gröblacher1,†

  • 1Kavli Institute of Nanoscience, Department of Quantum Nanoscience, Delft University of Technology, 2628CJ Delft, Netherlands
  • 2Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Sud, Université Paris-Saclay, C2N, 91767 Palaiseau, France
  • 3Université de Paris, Sorbonne Paris Cité, 75207 Paris, France

  • *These authors contributed equally to this work.
  • s.groeblacher@tudelft.nl

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Issue

Vol. 123, Iss. 16 — 18 October 2019

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