Towards imaging-based quantum optomechanics

Christian M. Pluchar; Wenhua He; Morgan E. Choi; Jack Manley; Nico Deshler; Saikat Guha; Dalziel J. Wilson

doi:10.1117/12.3001998

13 March 2024 Towards imaging-based quantum optomechanics

Christian M. Pluchar, Wenhua He, Morgan E. Choi, Jack Manley, Nico Deshler, Saikat Guha, Dalziel J. Wilson

Proceedings Volume 12912, Quantum Sensing, Imaging, and Precision Metrology II; 129120S (2024) https://doi.org/10.1117/12.3001998
Event: SPIE Quantum West, 2024, San Francisco, California, United States

Abstract

Quantum optomechanics has led to advances in quantum sensing, optical manipulation of mechanical systems, and macroscopic quantum physics. However, previous studies have typically focused on dispersive optomechanical coupling, which modifies the phase of the light field. Here, we discuss recent advances in “imaging-based” quantum optomechanics – where information about the mechanical resonator’s motion is imprinted onto the spatial mode of the optical field, akin to how information encoded in an image. Additionally, we find radiation pressure backaction, a phenomenon not usually discussed in imaging studies, comes from spatially uncorrelated fluctuations of the optical field. First, we examine a simple thought experiment in which the displacement of a membrane resonator can be measured by extracting the amplitude of specific spatial modes. Torsion modes are naturally measured with this coupling and are interesting for applications such as precision torque sensing, tests of gravity, and measurements of angular displacement at and beyond the standard quantum limit. As an experimental demonstration, we measure the angular displacement of the torsion mode of a Si₃N₄ nanoribbon near the quantum imprecision limit using both an optical lever and a spatial mode demultiplexer. Finally, we discuss the potential for future imaging-based quantum optomechanics experiments, including observing pondermotive squeezing of different spatial modes and quantum back-action evasion in angular displacement measurements.

Conference Presentation

Citation Download Citation

Christian M. Pluchar, Wenhua He, Morgan E. Choi, Jack Manley, Nico Deshler, Saikat Guha, and Dalziel J. Wilson "Towards imaging-based quantum optomechanics", Proc. SPIE 12912, Quantum Sensing, Imaging, and Precision Metrology II, 129120S (13 March 2024); https://doi.org/10.1117/12.3001998

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