54 citations · 350 across the 21 of their papers we have counts for
21 papers
Aggregate Frequency Width, Nuclear Hyperfine Coupling and Jahn-Teller Effect of Impurity Ion ESR in Dielectric Resonator at Millikelvin
M. A. Hosain, J. -M. Le Floch, J. Krupka +1
The impurity paramagnetic ion, substitutes in the single crystal lattice, this results in a elongated octahedron, the resulting measured g-factor…
Rigorous ESR spectroscopy of impurity ion with oxygen vacancy in ferroelectric crystal at 20 mK
M. A. Hosain, J-M. Le Floch, J. Krupka +1
Impurity ion electron spin resonance (ESR) spectroscopy using multiple dielectric modes in a dielectric resonator has been performed with a tuneable DC magnetic…
Ferroelectric phase transition and crystal asymmetry monitoring of using quasi and quasi modes
M. A. Hosain, J-M. Le Floch, J. F. Bourhill +2
Dielectric spectroscopy of single crystal over a broad range of microwave frequency using quasi and quasi modes reveals crystal asymmetry from t…
Frequency-Temperature sensitivity reduction with optimized microwave Bragg resonators
Jean-Michel Le Floch, Christopher Murphy, John Gideon Hartnett +4
Dielectric resonators are employed to build state-of-the-art low-noise and high- stability oscillators operating at room and cryogenic temperatures. A resonator temperature coeffic…
Towards achieving strong coupling in 3D-cavity with solid state spin resonance
J-M. Le Floch, N. Delhote, M. Aubourg +4
We investigate the microwave magnetic field confinement in several microwave 3D-cavities, using 3D finite-element analysis to determine the best design and achieve strong coupling…
Addressing a single NV spin with a macroscopic dielectric microwave cavity
J. -M. Le Floch, C. Bradac, N. Nand +3
We present a technique for addressing single NV center spins in diamond over macroscopic distances using a tunable dielectric microwave cavity. We demonstrate optically detec…
Strong Coupling Between P1 Diamond Impurity Centres and 3D Lumped Photonic Microwave Cavity
Daniel L. Creedon, Jean-Michel Le Floch, Maxim Goryachev +3
We report strong coupling between an ensemble of N impurity (P1) centres in diamond and microwave photons using a unique double post re-entrant cavity. The cavity is designed so th…
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…
Hyperparametric effects in a whispering-gallery mode rutile dielectric resonator at liquid helium temperatures
Nitin R. Nand, Maxim Goryachev, Jean-Michel Le Floch +2
We report the first observation of low power drive level sensitivity, hyperparametric amplification, and single-mode hyperparametric oscillations in a dielectric rutile whispering-…
Strong Coupling Between Whispering Gallery Photons and Spin States of Iron Group Impurity Ions
Maxim Goryachev, Warrick G. Farr, Natalia C. Carvalho +5
Interaction of Whispering Gallery Modes (WGM) with dilute spin ensembles in solids is an interesting paradigm of Hybrid Quantum Systems potentially beneficial for Quantum Signal Pr…
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…
Resonator Power to Frequency Conversion in a Cryogenic Sapphire Oscillator
Nitin R. Nand, Stephen R. Parker, Eugene N. Ivanov +3
We report on the measurement and characterization of power to frequency conversion in the resonant mode of a cryogenic sapphire loaded cavity resonator, which is used as the freque…
Controlling the Frequency-Temperature Sensitivity of a Cryogenic Sapphire Maser Frequency Standard by Manipulating Fe3+ Spins in the Sapphire Lattice
Karim Benmessai, Daniel L. Creedon, Mohamad Mrad +5
To create a stable signal from a cryogenic sapphire maser frequency standard, the frequency-temperature dependence of the supporting Whispering Gallery mode must be annulled. We re…
Detrapping and retrapping of free carriers in nominally pure single crystal GaP, GaAs and 4H-SiC semiconductors under light illumination at cryogenic temperatures
David Mouneyrac, John G. Hartnett, Jean-Michel Le Floch +3
We report on extremely sensitive measurements of changes in the microwave properties of high purity non-intentionally-doped single-crystal semiconductor samples of gallium phosphid…
Single Crystal Sapphire at milli-Kelvin Temperatures: Observation of Electromagnetically Induced Thermal Bistability in High Q-factor Whispering Gallery Modes
Daniel L. Creedon, Michael E. Tobar, Jean-Michel Le Floch +2
Resonance modes in single crystal sapphire (-AlO) exhibit extremely high electrical and mechanical Q-factors ( at 4K), which are important characteristics…
Cryogenic Sapphire Oscillator using a low-vibration design pulse-tube cryocooler: First results
John G. Hartnett, Nitin R. Nand, Chao Wang +1
A Cryogenic Sapphire Oscillator has been implemented at 11.2 GHz using a low-vibration design pulse-tube cryocooler. Compared with a state-of-the-art liquid helium cooled CSO in th…
Rotating Odd-Parity Lorentz Invariance Test in Electrodynamics
Michael E. Tobar, Eugene N. Ivanov, Paul L. Stanwix +2
We report the first operation of a rotating odd-parity Lorentz Invariance test in electrodynamics using a microwave Mach-Zehnder interferometer with permeable material in one arm.…
Modified permittivity observed in bulk Gallium Arsenide and Gallium Phosphide samples at 50 K using the Whispering Gallery mode method
J. G. Hartnett, D. Mouneyrac, J-M. Le Floch +3
Whispering Gallery modes in bulk cylindrical Gallium Arsenide and Gallium Phosphide samples have been examined both in darkness and under white light at 50 K. In both samples we ob…