54 citations · 230 across the 20 of their papers we have counts for
20 papers
Split-Post Re-entrant Microwave Displacement Transducer with Quadratic Readout
Sonali Parashar, Jeremy F. Bourhill, Maxim Goryachev +1
We investigate a microwave-cavity-based displacement readout employing a split-post geometry to measure the motion of a dielectric membrane. Due to symmetry, the cavity response to…
Follow-up Search for a Tentative Dark Photon Signal Near 19.5 eV using ORGAN-Q infrastructure
Aaron P. Quiskamp, Graeme R. Flower, Maxim Goryachev +2
A recent independent dark photon (DP) focused reanalysis of existing data from the TASEH axion haloscope experiment reported a tentative DP dark matter signal with local significan…
Dielectric Properties of Single Crystal Calcium Tungstate
Elrina Hartman, Michael E Tobar, Ben T McAllister +3
This investigation employed microwave whispering gallery mode (WGM) analysis to characterize the dielectric properties of a cylindrical, single-crystal sample of calcium tungstate…
Experimental Limits on Planetary Mass Primordial Black Hole Mergers
William M. Campbell, Leonardo Mariani, Michael E. Tobar +1
The multi-mode acoustic gravitational wave experiment (MAGE) is a high-frequency gravitational wave detection experiment featuring cryogenic quartz bulk acoustic wave resonators op…
Cryogenic Microwave Whispering Gallery Mode Spectroscopy of Paramagnetic Impurities in High-Purity Crystalline LiF
Steven Samuels, William Campbell, Michael E. Tobar +1
A low-noise cryogenic microwave spectroscopy experiment was performed on a high-purity lithium fluoride (LiF) crystal. The spectroscopy data revealed avoided level crossing interac…
Ultraviolet Light-Induced Microwave Mode Tuning in a Rutile TiO Whispering Gallery Resonator
Catriona A. Thomson, Michael E. Tobar, Maxim Goryachev
We report the observation of transient nonlinear optical effects in a macroscopic whispering gallery mode resonator made of rutile TiO, demonstrating strong optical-microwave t…
Challenges and Opportunities of Gravitational Wave Searches above 10 kHz
Nancy Aggarwal, Odylio D. Aguiar, Diego Blas +34
The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines the challenges…
Low Temperature Properties of Low-Loss Macroscopic Lithium Niobate Bulk Acoustic Wave Resonators
William M. Campbell, Leonardo Mariana, Sonali Parashar +2
We investigate gram scale macroscopic bulk acoustic wave (BAW) resonators manufactured from plates of piezoelectric lithium niobate. The intrinsic competing loss mechanisms were st…
Microwave Cavity Mode Optimisation by Background Anti-Resonance Tuning
Michael T. Hatzon, Eugene N. Ivanov, Jeremy F. Bourhill +2
To derive the best oscillator phase noise when implementing a high-Q resonator, the spectral line-shape must have high contrast and symmetry. Ideally, this line-shape is Lorentzian…
Conductivity Freeze-Out in Isotopically Pure Si-28 at milli-Kelvin Temperatures
Ben T. McAllister, Zijun C. Zhao, Jeremy F. Bourhill +4
Silicon is a key semiconducting material for electrical devices and hybrid quantum systems where low temperatures and zero-spin isotopic purity can enhance quantum coherence. Elect…
Generation of Coherent Phonons via a Cavity Enhanced Photonic Lambda Scheme
Jeremy Bourhill, Natalia do Carmo Carvalho, Maxim Goryachev +2
We demonstrate the generation of coherent phonons in a quartz Bulk Acoustic Wave (BAW) resonator through the photoelastic properties of the crystal, via the coupling to a microwave…
Piezo-optomechanical coupling of a 3D microwave resonator to a bulk acoustic wave crystalline resonator
N. C. Carvalho, J. Bourhill, M. Goryachev +2
We report the observation of coupling between a 3D microwave cavity mode and a bulk mechanical resonator mediated by piezoelectric and radiation pressure effects. The system is com…
Low-Temperature Microwave Properties of Biaxial YAlO3
N. C. Carvalho, M. Goryachev, J. Krupka +2
Low-loss crystals with defects due to paramagnetic or rare earth impurity ions is a major area of investigation for quantum hybrid systems at both optical and microwave frequencies…
Piezoelectric Tunable Microwave Superconducting Cavity
N. C. Carvalho, Y. Fan, M. E. Tobar
In the context of engineered quantum systems, there is a demand for superconducting tunable devices able to operate with high Q-factors at power levels equivalent to only a few pho…
Multi-mode technique for the determination of the biaxial Y2SiO5 permittivity tensor from 300 to 6 Kelvin
N. C. Carvalho, J-M. Le Floch, J. Krupka +1
The Y2SiO5 (YSO) crystal is a dielectric material with biaxial anisotropy with known values of refractive index at optical frequencies. It is a well-known rare-earth (RE) host mate…
Piezoelectric Voltage Coupled Reentrant Cavity Resonator
Natalia C. Carvalho, Yaohui Fan, Jean-Michel Le Floch +1
A piezoelectric voltage coupled microwave reentrant cavity has been developed. The central cavity post is bonded to a piezoelectric actuator allowing the voltage control of small p…
Evidence of Dilute Ferromagnetism in Rare-Earth doped YAG
W. G. Farr, M. Goryachev, J. M. le Floch +2
This work demonstrates strong coupling regime between an Erbium ion spin ensemble and microwave Hybrid Cavity-Whispering Gallery Modes in a Yttrium Aluminium Garnet dielectric crys…
3D Cavity quantum electrodynamics with a rare-earth spin ensemble
S. Probst, A. Tkalcec, H. Rotzinger +6
We present cavity QED experiments with an Er:YSO crystal magnetically coupled to a 3D cylindrical sapphire loaded copper resonator. Such waveguide cavities are promising for the re…
Discovery of higher order reentrant modes by constructing a cylindrical symmetric ring and post cavity resonator
Y. Fan, Z. Zhang, N. C. Carvalho +3
Analysis of the properties of resonant modes in a reentrant cavity structure comprising of a post and a ring was undertaken and verified experimentally. In particular we show the e…
Rigorous analysis of highly tunable cylindrical Transverse Magnetic mode re-entrant cavities
J-M. Le Floch, Y. Fan, M. Aubourg +8
Cylindrical re-entrant cavities are unique three-dimensional structures that resonate with their electric and magnetic fields in separate parts of the cavity. To further understand…