Jean-Michel Le Floch

Assistant Professor, PhD W.Aust.

  • The University of Western Australia (M013), 35 Stirling Highway,

    6009 Perth

    Australia

  • 511 Citations
  • 14 h-Index
20052018
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Research Output 2005 2018

  • 511 Citations
  • 14 h-Index
  • 51 Article
  • 8 Conference paper
  • 1 Letter
2018
3 Citations (Scopus)
Jahn-Teller effect
Dielectric resonators
Paramagnetic resonance
Anisotropy
resonators

Rigorous ESR spectroscopy of Fe3+ impurity ion with oxygen vacancy in ferroelectric SrTiO3 crystal at 20 mK

Hosain, M. A., Le Floch, J-M., Krupka, J. & Tobar, M. E., 25 Jul 2018, In : Journal of Physics-Condensed Matter. 30, 29, 6 p., 295805.

Research output: Contribution to journalArticle

Whispering gallery mode dielectric spectroscopy of SrLaAlO4 at milliKelvin temperatures

Hosain, M. A., Le Floch, J. M., Krupka, J., Bourhill, J. F. & Tobar, M. E., 21 Jun 2018, In : Journal of Applied Physics. 123, 23, 234103.

Research output: Contribution to journalArticle

whispering gallery modes
Q factors
spectroscopy
temperature
microwaves
2017
96 Downloads (Pure)

Frequency-temperature sensitivity reduction with optimized microwave Bragg resonators

Le Floch, J. M., Murphy, C., Hartnett, J. G., Madrangeas, V., Krupka, J., Cros, D. & Tobar, M. E., 7 Jan 2017, In : Journal of Applied Physics. 121, 1, 014102.

Research output: Contribution to journalArticle

Open Access
File
resonators
microwaves
Q factors
temperature
whispering gallery modes
3 Citations (Scopus)

Whispering Gallery mode ESR spectroscopy and parameters measurement in single crystal SrLaAlO4 at millikelvin temperature

Hosain, M. A., Le Floch, J. M., Krupka, J. & Tobar, M. E., 1 Aug 2017, In : Journal of Magnetic Resonance. 281, p. 209-216 8 p.

Research output: Contribution to journalArticle

Whispering gallery modes
whispering gallery modes
Paramagnetic resonance
Spectrum Analysis
Single crystals
2016
6 Citations (Scopus)

Towards achieving strong coupling in three-dimensional-cavity with solid state spin resonance

Le Floch, J-M., Delhote, N., Aubourg, M., Madrangeas, V., Cros, D., Castelletto, S. & Tobar, M., Apr 2016, In : Journal of Applied Physics. 119, 15, p. 153901-1- 153901-8 153901.

Research output: Contribution to journalArticle

spin resonance
solid state
cavities
cavity resonators
microwaves
2015
10 Citations (Scopus)
132 Downloads (Pure)

Discovery of iron group impurity ion spin states in single crystal Y2SiO5 with strong coupling to whispering gallery photons

Goryachev, M., Farr, W. G., Carmo Carvalho, N. D., Creedon, D., Le Floch, J-M., Probst, S., Bushev, P. & Tobar, M., 8 Jun 2015, In : Applied Physics Letters. 106, 23, p. 232401-1 - 232401-5

Research output: Contribution to journalArticle

Open Access
File
whispering gallery modes
iron
impurities
single crystals
photons
7 Citations (Scopus)
142 Downloads (Pure)

Evidence of dilute ferromagnetism in rare-earth doped yttrium aluminium garnet

Farr, W. G., Goryachev, M., Le Floch, J-M., Bushev, P. & Tobar, M., 21 Sep 2015, In : Applied Physics Letters. 107, 12, p. 122401-1 - 122401-5

Research output: Contribution to journalArticle

Open Access
File
yttrium-aluminum garnet
ferromagnetism
Q factors
rare earth elements
whispering gallery modes

Frequency stability and phase noise performance of X-band to Ka-band active multiplier

Bara-Maillet, R., Creedon, D., Parker, S., Le Floch, J-M. & Tobar, M., 30 Nov 2015, In : Electronics Letters. 51, 24, p. 2015-2017 3 p.

Research output: Contribution to journalArticle

Frequency doublers
Stimulated emission
Frequency stability
Phase noise
Amplification
3 Citations (Scopus)

Microwave-to-millimeter-wave synthesis chain phase noise performance

Bara-Maillet, R., Parker, S., Nand, N. R., Le Floch, J-M. & Tobar, M., 13 Oct 2015, In : IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 62, 10, p. 1895-1900 6 p.

Research output: Contribution to journalArticle

Phase noise
multiplication
Millimeter waves
millimeter waves
Microwaves
3 Citations (Scopus)
111 Downloads (Pure)

Multi-mode technique for the determination of the biaxial Y2SiO5 permittivity tensor from 300 to 6 K

Carvalho, N. C., Le Floch, J-M., Krupka, J. & Tobar, M., 2015, In : Applied Physics Letters. 106, 19, 4 p., 192904.

Research output: Contribution to journalArticle

Open Access
File
tensors
permittivity
microwave coupling
rare earth elements
crystals
14 Citations (Scopus)

Strong coupling between P1 diamond impurity centers and a three-dimensional lumped photonic microwave cavity

Creedon, D., Le Floch, J-M., Goryachev, M., Farr, W. G., Castelletto, S. & Tobar, M., 24 Apr 2015, In : Physical Review B - Condensed Matter and Materials Physics. 91, 14, 5 p., 140408.

Research output: Contribution to journalArticle

Diamond
Photonics
Diamonds
diamonds
Microwaves
2014
Aluminum Oxide
Sapphire
Cavity
Phase shifters
Phase noise
7 Citations (Scopus)

Addressing a single spin in diamond with a macroscopic dielectric microwave cavity

Le Floch, J-M., Bradac, C., Nand, N. R., Castelletto, S. A., Tobar, M. & Volz, T., 29 Sep 2014, In : Applied Physics Letters. 105, 13, 3 p., 133101.

Research output: Contribution to journalArticle

Open Access
diamonds
microwaves
nitrogen
cavities
magnetic resonance
4 Citations (Scopus)

Hyperparametric effects in a whispering-gallery mode rutile dielectric resonator at liquid helium temperatures

Nand, N., Goryachev, M., Le Floch, J-M., Creedon, D. & Tobar, M., 6 Oct 2014, In : Journal of Applied Physics. 116, p. 134105-1-134105-8 8 p., 116.

Research output: Contribution to journalArticle

whispering gallery modes
liquid helium
rutile
resonators
degrees of freedom
17 Citations (Scopus)

Intercomparison of permittivity measurement techniques for ferroelectric thin layers

Quéfféléc, P., Laur, V., Chevalier, A., Le Floch, J-M., Passerieux, D., Cros, D., Madrangeas, V., Le Febvrier, A., Députier, S., Guilloux-Viry, M., Houzet, G., Lacrevaz, T., Bermond, C. & Fléchet, B., 2014, In : Journal of Applied Physics. 115, 2, p. 024103-1 - 024103-10

Research output: Contribution to journalArticle

dielectric properties
permittivity
broadband
microwaves
error analysis
5 Citations (Scopus)

Investigation of higher order reentrant modes of a cylindrical reentrant-ring cavity resonator

Fan, Y., Zhang, Z., Carvalho, N. C., Le Floch, J-M., Shan, Q. & Tobar, M., Aug 2014, In : IEEE Transactions on Microwave Theory and Techniques. 62, 8, p. 1657-1662

Research output: Contribution to journalArticle

Cavity resonators
cavity resonators
Resonators
Transducers
rings
14 Citations (Scopus)
256 Downloads (Pure)

Invited article: Dielectric material characterization techniques and designs of high-Q resonators for applications from micro to millimeter-waves frequencies applicable at room and cryogenic temperatures

Le Floch, J-M., Fan, Y., Humbert, G., Shan, Q., Férachou, D., Bara-Maillet, R., Aubourg, M., Hartnett, J., Madrangeas, V., Cros, D., Blondy, J. M., Krupka, J. L. & Tobar, M., 20 Mar 2014, In : Review of Scientific Instruments. 85, 3, p. 1-14

Research output: Contribution to journalArticle

Open Access
File
cryogenic temperature
Millimeter waves
Cryogenics
millimeter waves
Q factors
2 Citations (Scopus)

Metal bulk foil resistor characterization for BAW application at low cryogenic temperatures

Bara-Maillet, R., Goryachev, M., Creedon, D., Le Floch, J-M. & Tobar, M., Mar 2014, In : IEEE Transactions on Instrumentation and Measurement. 63, 3, p. 628-632

Research output: Contribution to journalArticle

cryogenic temperature
resistors
Resistors
Cryogenics
Metal foil
9 Citations (Scopus)
173 Downloads (Pure)

Piezoelectric voltage coupled reentrant cavity resonator

Carvalho, N., Fan, Y., Le Floch, J-M. & Tobar, M., 14 Oct 2014, In : Review of Scientific Instruments. 85, 10, 4 p., 104705.

Research output: Contribution to journalArticle

Open Access
File
Cavity resonators
cavity resonators
Transducers
cavities
Piezoelectric materials
5 Citations (Scopus)

Radio frequency signals synthesised from independent cryogenic sapphire oscillators

Hartnett, J. G., Parker, S., Ivanov, E., Povey, T., Nand, N. R. & Le Floch, J-M., 28 Feb 2014, In : Electronics Letters. 50, 4, p. 294-295 2 p.

Research output: Contribution to journalArticle

Frequency stability
Phase noise
Sapphire
Cryogenics
Microwaves
2 Citations (Scopus)
radio signals
Global Positioning System
Global positioning system
time measurement
spacecraft
29 Citations (Scopus)

Three-dimensional cavity quantum electrodynamics with a rare-earth spin ensemble

Probst, S., Tkalcec, A., Rotzinger, H., Rieger, D., Le Floch, J-M., Goryachev, M., Tobar, M., Ustinov, A. V. & Bushev, P. A., 12 Sep 2014, In : Physical Review B. 90, 10, 5 p., 100404.

Research output: Contribution to journalArticle

Aluminum Oxide
Electrodynamics
quantum electrodynamics
Sapphire
Rare earths

Ultra-sensitive Whispering Gallery Mode spectroscopy of low loss crystals at cryogenic temperatures

Goryachev, M., Farr, W. G., Carvalho, N. C., Creedon, D., Lefloch, J-M., Benmessaï, K., Tobar, M. & Bushev, P. A., 2014, 2014 IEEE International Frequency Control Symposium Proceedings. Piscataway, NJ, USA: IEEE, Institute of Electrical and Electronics Engineers, Vol. 1. p. 1-3

Research output: Chapter in Book/Conference paperConference paper

whispering gallery modes
cryogenic temperature
sapphire
impurities
spectroscopy
2013
17 Citations (Scopus)

Hybrid electron spin resonance and whispering gallery mode resonance spectroscopy of Fe3+ in sapphire

Benmessaï, K., Farr, W. G., Creedon, D., Reshitnyk, Y., Le Floch, J-M., Duty, T. L. & Tobar, M., 2013, In : Physical Review B. 87, 9, p. 9pp

Research output: Contribution to journalArticle

Whispering gallery modes
Aluminum Oxide
whispering gallery modes
Sapphire
Paramagnetic resonance
2 Citations (Scopus)

Intrinsic phase noise properties and frequency stability of millimetre-wave module at 90 GHz

Bara-Maillet, R., Parker, S., Le Floch, J-M. & Tobar, M., 2013, In : Electronics Letters. 49, 14, p. 2pp

Research output: Contribution to journalArticle

Frequency stability
Phase noise
Millimeter waves
Signal generators
10 Citations (Scopus)

Resonator power to frequency conversion in a cryogenic sapphire oscillator

Nand, N. R., Parker, S., Ivanov, E., Le Floch, J-M., Hartnett, J. G. & Tobar, M., 2013, In : Applied Physics Letters. 103, 4, p. 043502-1 - 043502-4

Research output: Contribution to journalArticle

frequency converters
cryogenics
sapphire
resonators
oscillators
21 Citations (Scopus)

Rigorous analysis of highly tunable cylindrical transverse magnetic mode re-entrant cavities

Le Floch, J-M., Fan, Y., Aubourg, M., Cros, D., Carvalho, N. C., Shan, Q., Bourhill, J., Ivanov, E., Humbert, G., Madrangeas, V. & Tobar, M., 2013, In : Review of Scientific Instruments. 84, 12, p. 125114-1 - 125114-7

Research output: Contribution to journalArticle

2012
8 Citations (Scopus)

Controlling the frequency-temperature sensitivity of a cryogenic sapphire maser frequency standard by manipulating Fe3 + spins in the sapphire lattice

Benmessai, K., Creedon, D., Le Floch, J-M., Tobar, M., Mrad, M., Bourgeois, P-Y., Kersalé, Y. & Giordano, V., 2012, In : Physical Review B - Condensed Matter and Materials Physics. 85, 7, p. 7pp

Research output: Contribution to journalArticle

9 Citations (Scopus)
2011
6 Citations (Scopus)

Compact hollow-core photonic band gap resonator with optimised metallic cavity at microwave frequencies

Férachou, D., Humbert, G., Le Floch, J-M., Aubourg, M., Auguste, J-L., Tobar, M., Cros, D. & Blondy, J-M., 2011, In : Electronics Letters. 47, 14, p. 805 - 807

Research output: Contribution to journalArticle

10 Citations (Scopus)

Electromagnetic properties of polycrystalline diamond from 35 K to room temperature and microwave to terahertz frequencies

Floch, J-M., Bara, R., Hartnett, J., Tobar, M., Mouneyrac, D., Passerieux, D., Cros, D., Krupka, J., Goy, P. & Caroopen, S., 2011, In : Journal of Applied Physics. 109, 9, p. 6pp

Research output: Contribution to journalArticle

Generation of 100 GHz with Parts in 1016 Frequency Stability Using Cryogenic Sapphire Oscillators

Bara, R., Le Floch, J-M. G., Tobar, M. E., Stanwix, P. L., Parker, S. R., Hartnett, J. G. & Ivanov, E. N., 2011, Proceedings of the 5th Joint Conference of the 65th IEEE International Frequency Control Symposium and the 25th European Frequency and Time Forum . Nguyen, C. T-C. & Santarelli, G. (eds.). IEEE, Institute of Electrical and Electronics Engineers, 5977766

Research output: Chapter in Book/Conference paperConference paper

frequency stability
cryogenics
sapphire
oscillators
radio astronomy

High Precision Microwave Interferometers and Oscillators for Applied and Fundamental Physics Applications

Tobar, M. E., Ivanov, E. N., Hartnett, J. G., Le Floch, J-M. G. & Stanwix, P. L., 2011, 2010 International Conference on Electromagnetics in Advanced Applications. Graglia, R. D. & Smith, P. D. (eds.). Sydney, NSW, Australia: IEEE, Institute of Electrical and Electronics Engineers, p. 803-806 4 p.

Research output: Chapter in Book/Conference paperConference paper

microwave interferometers
microwave oscillators
inventions
physics
frequency standards

Low-Loss Dielectric Material Characterization and High-Q Resonator Design from Microwave to Millimetre Waves Frequencies

Le Floch, J-M., Tobar, M., Humbert, G., Mouneyrac, D., Férachou, D., Bara, R., Aubourg, M., Hartnett, J., Cros, D., Blondy, J-M. & Krupka, J., 2011, In : Journal of Physical Science and Application. 1, 1, p. 15-28

Research output: Contribution to journalLetter

15 Citations (Scopus)

Microwave properties of semi-insulating silicon carbide between 10 and 40 GHz and at cryogenic temperatures

Hartnett, J., Mouneyrac, D., Krupka, J., Le Floch, J-M., Tobar, M. & Cros, D., 2011, In : Journal of Applied Physics. 109, 6, p. 4pp

Research output: Contribution to journalArticle

1 Citation (Scopus)

Study of Fe 3+-sapphire maser above 4K

Benmessai, K., Mrad, M., Creedon, D., Le Floch, J-M., Tobar, M., Bourgeois, P-Y., Kersale, Y. & Giordano, V., 2011, IEEE International Frequency Control Symposium & Exposition. Proceedings. United States: IEEE, Institute of Electrical and Electronics Engineers, Vol. n/a. p. n/a

Research output: Chapter in Book/Conference paperConference paper

2010
19 Citations (Scopus)

Cryogenic sapphire oscillator using a low- vibration design pulse-tube cryocooler: First results

Hartnett, J., Nand, N. R., Wang, C. & Le Floch, J-M., 2010, In : IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control. 57, 5, p. 1034-1038

Research output: Contribution to journalArticle

2 Citations (Scopus)

Detrapping and retrapping of free carriers in nominally pure single crystal GaP, GaAs, and 4H-SiC semiconductors under light illumination at cryogenic temperatures

Mouneyrac, D., Hartnett, J., Le Floch, J-M., Tobar, M., Cros, D. & Krupka, J., 2010, In : Journal of Applied Physics. 108, 10, p. Article number 104107, 6pp

Research output: Contribution to journalArticle

20 Citations (Scopus)

High-power solid-state sapphire whispering gallery mode maser

Creedon, D., Benmessai, K., Tobar, M., Hartnett, J., Bourgeois, P. F., Kersale, Y., Le Floch, J-M. & Giordano, V., 2010, In : IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 57, 3, p. 641-646

Research output: Contribution to journalArticle

10 Citations (Scopus)

Hollow-core resonator based on out-of-plane two-dimensional photonic band-gap crystal cladding at microwave frequencies

Humbert, G., Le Floch, J-M., Mouneyrac, D., Ferachou, D., Aubourg, M., Tobar, M., Cros, D. & Blondy, J. M., 2010, In : Applied Physics Letters. 96, 5, p. Article 051108, 3pp

Research output: Contribution to journalArticle

7 Citations (Scopus)

Precise phase synchronization of a cryogenic microwave oscillator

Ivanov, E., Mouneyrac, D., Le Floch, J-M., Tobar, M. & Cros, D., 2010, In : Review of Scientific Instruments. 81, p. Article 064702, 5pp

Research output: Contribution to journalArticle

13 Citations (Scopus)

Single-crystal sapphire resonator at millikelvin temperatures: Observation of thermal bistability in high-Q factor whispering gallery modes

Creedon, D., Tobar, M., Le Floch, J-M., Reshitnyk, Y. & Duty, T., 2010, In : Physical Review B. 82, 10, p. Article 104305, 5pp

Research output: Contribution to journalArticle

2009
4 Citations (Scopus)

High Power Solid-State Sapphire Whispering Gallery Mode Maser

Creedon, D., Benmessai, K., Hartnett, J., Bourgeois, P-Y., Kersale, Y., Le Floch, J-M., Tobar, M. & Giordano, V., 2009, IEEE - IFCS. Besancon, France ed. IEEE - IFCS: The Printing House, Vol. 1. p. 282-285

Research output: Chapter in Book/Conference paperConference paper

Hollow-core resonator based on out-of-plane 2D photonic band-gap crystal cladding

Humbert, G., Mouneyrac, D., Ferachou, D., Cros, D., Blondy, J. M., Le Floch, J-M. & Tobar, M., 2009, IEEE - IFCS. Besancon, France ed. IEEE-IFCS: The Printing House, Vol. 1. p. 286-289

Research output: Chapter in Book/Conference paperConference paper

Observation of persistent photoconductivity and modified permittivity in bulk Gallium Arsenide and Gallium Phosphide samples at cryogenic temperatures

Mouneyrac, D., Hartnett, J., Le Floch, J-M., Tobar, M. & Cros, D., 2009, IEEE - IFCS. Besancon, France ed. IEEE - IFCS: The Printing House, Vol. 1. p. 886-889

Research output: Chapter in Book/Conference paperConference paper

14 Citations (Scopus)

Reduction of Microwave dielectric losses in KTa1-xNbxO3 thin films by MgO-doping

Simon, Q., Bouquet, V., Peng, W., Le Floch, J-M., Houndonoughbo, F., Deputier, S., Weber, S., Dausher, A., Madranageas, V., Cros, D. & Guilloux-Viry, M., 2009, In : Thin Solid Films. 517, 20, p. 5940-5942

Research output: Contribution to journalArticle

Dielectric losses
dielectric loss
Aluminum Oxide
Microwaves
Doping (additives)
24 Citations (Scopus)

Rotating odd-parity Lorentz invariance test in electrodynamics

Tobar, M., Ivanov, E., Stanwix, P., Le Floch, J-M. & Hartnett, J., 2009, In : Physical Review D. 80, 12, p. Article number 125024, 6pp

Research output: Contribution to journalArticle

microwave interferometers
Mach-Zehnder interferometers
electrodynamics
spectral resolution
invariance
20 Citations (Scopus)

Thin Film Materials Characterization Using TE Modes Cavity

Le Floch, J-M., Houndonougbo, F., Madrangeas, V., Cros, D., Guilloux-Viry, M. & Peng, W., 2009, In : Journal of Electromagnetic Waves and Applications. 23, 4, p. 549-559

Research output: Contribution to journalArticle

Thin films
cavities
Microwave frequencies
thin films
microwave frequencies
2008
11 Citations (Scopus)
161 Downloads (Pure)

Low-loss materials for high Q-factor Bragg reflector resonators

Le Floch, J-M., Tobar, M., Cros, D. & Krupka, J., 2008, In : Applied Physics Letters. 92, 3, p. online - approx 5-20pp

Research output: Contribution to journalArticle

File
Bragg reflectors
Q factors
resonators
permittivity
reflectors