303 citations · 1.4k across the 30 of their papers we have counts for
31 papers
Quantitative Profilometric Measurement of Magnetostriction in Thin-Films
Hamish Greenall, Benjamin J. Carey, Douglas Bulla +5
A DC non-contact method for measuring the magnetostrictive strain in thin-films is demonstrated, achieving a state-of-the-art sensitivity of 0.1 ppm. In this method, an optical pro…
Waveguide-integrated and portable optomechanical magnetometer
Fernando Gotardo, Benjamin J. Carey, Hamish Greenall +7
Optomechanical magnetometers enable highly sensitive magnetic field sensing. However, all such magnetometers to date have been optically excited and read-out either via free space…
Optomechanical dark matter instrument for direct detection
Christopher G. Baker, Warwick P. Bowen, Peter Cox +3
We propose the Optomechanical Dark-matter INstrument (ODIN), based on a new method for the direct detection of low-mass dark matter. We consider dark matter interacting with superf…
Cascading of Nanomechanical Resonator Logic
T. Jin, C. G. Baker, E. Romero +4
Nanomechanical systems have been proposed as an alternative computing platform for high radiation environments, where semiconductor electronics traditionally fail, as well as to al…
Engineered entropic forces allow ultrastrong dynamical backaction
Andreas Sawadsky, Raymond A. Harrison, Glen I. Harris +4
When confined within an optical cavity, light can exert strong radiation pressure forces. Combined with dynamical backaction, this enables important processes such as laser cooling…
Scalable nanomechanical logic gate
Erick Romero, Nicolas P. Mauranyapin, Timothy M. F. Hirsch +4
Nanomechanical computers promise robust, low energy information processing. However, to date, electronics have generally been required to interconnect gates, while no scalable, pur…
Cryogenic and hermetically sealed packaging of photonic chips for optomechanics
W. W. Wasserman, R. A. Harrison, G. I. Harris +4
We demonstrate a hermetically sealed packaging system for integrated photonic devices at cryogenic temperatures with plug-and-play functionality. This approach provides the ability…
Superfluid Helium Drops Levitated in High Vacuum
C. D. Brown, Y. Wang, M. Namazi +3
We demonstrate the trapping of millimeter-scale superfluid Helium drops in high vacuum. The drops are sufficiently isolated that they remain trapped indefinitely, cool by evaporati…
Precision Magnetometers for Aerospace Applications
James S. Bennett, Brian E. Vyhnalek, Hamish Greenall +6
Aerospace technologies are crucial for modern civilization; space-based infrastructure underpins weather forecasting, communications, terrestrial navigation and logistics, planetar…
Tunnelling of transverse acoustic waves on a silicon chip
Nicolas P. Mauranyapin, Erick Romero, Rachpon Kalra +3
Nanomechanical circuits for transverse acoustic waves promise to enable new approaches to computing, precision biochemical sensing and many other applications. However, progress is…
Proposal for a quantum traveling Brillouin resonator
Glen I. Harris, Andreas Sawadsky, Yasmine L. Sfendla +3
Brillouin systems operating in the quantum regime have recently been identified as a valuable tool for quantum information technologies and fundamental science. However, reaching t…
Extreme quantum nonlinearity in superfluid thin-film surface waves
Yasmine L. Sfendla, Christopher G. Baker, Glen I. Harris +3
We show that highly confined superfluid films are extremely nonlinear mechanical resonators, offering the prospect to realize a mechanical qubit. Specifically, we consider third-so…
Strong optical coupling through superfluid Brillouin lasing
Xin He, Glen I. Harris, Christopher G. Baker +5
Brillouin scattering has applications ranging from signal processing, sensing and microscopy, to quantum information and fundamental science. Most of these applications rely on the…
Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip
Yauhen P. Sachkou, Christopher G. Baker, Glen I. Harris +8
Two-dimensional superfluidity and quantum turbulence are directly connected to the microscopic dynamics of quantized vortices. However, surface effects have prevented direct observ…
Modelling of vorticity, sound and their interaction in two-dimensional superfluids
Stefan Forstner, Yauhen Sachkou, Matt Woolley +4
Vorticity in two-dimensional superfluids is subject to intense research efforts due to its role in quantum turbulence, dissipation and the BKT phase transition. Interaction of soun…
High-frequency cavity optomechanics using bulk acoustic phonons
Prashanta Kharel, Glen I. Harris, Eric A. Kittlaus +4
To date, micro- and nano-scale optomechanical systems have enabled many proof-of-principle quantum operations through access to high-frequency (GHz) phonon modes that are readily c…
Cavity Optomechanics in a Levitated Helium Drop
L. Childress, M. P. Schmidt, A. D. Kashkanova +5
We describe a proposal for a new type of optomechanical system based on a drop of liquid helium that is magnetically levitated in vacuum. In the proposed device, the drop would ser…
Squeezing-enhanced measurement sensitivity in a cavity optomechanical system
Hugo Kerdoncuff, Ulrich B. Hoff, Glen I. Harris +2
We determine the theoretical limits to squeezing-enhanced measurement sensitivity of mechanical motion in a cavity optomechanical system. The motion of a mechanical resonator is tr…
Thin film superfluid optomechanics
Christopher G. Baker, Glen I. Harris, David L. McAuslan +3
Excitations in superfluid helium represent attractive mechanical degrees of freedom for cavity optomechanics schemes. Here we numerically and analytically investigate the propertie…
Quantum enhanced feedback cooling of a mechanical oscillator
Clemens Schäfermeier, Hugo Kerdoncuff, Ulrich B. Hoff +7
Laser cooling is a fundamental technique used in primary atomic frequency standards, quantum computers, quantum condensed matter physics and tests of fundamental physics, among oth…
Microphotonic Forces From Superfluid Flow
D. L. McAuslan, G. I. Harris, C. Baker +4
In cavity optomechanics, radiation pressure and photothermal forces are widely utilized to cool and control micromechanical motion, with applications ranging from precision sensing…
Laser cooling and control of excitations in superfluid helium
G. I. Harris, D. L. McAuslan, E. Sheridan +3
Superfluidity is an emergent quantum phenomenon which arises due to strong interactions between elementary excitations in liquid helium. These excitations have been probed with gre…
Optomechanical parameter estimation
Shan Zheng Ang, Glen I. Harris, Warwick P. Bowen +1
We propose a statistical framework for the problem of parameter estimation from a noisy optomechanical system. The Cramér-Rao lower bound on the estimation errors in the long-time…
Minimum requirements for feedback enhanced force sensing
Glen I. Harris, David L. McAuslan, Thomas M. Stace +2
The problem of estimating an unknown force driving a linear oscillator is revisited. When using linear measurement, feedback is often cited as a mechanism to enhance bandwidth or s…