Phone: (027) 87543880
Academic Areas: High-frequency electronics engineering
In 2007, he was working as an engineer at XLIM research institute from the French National Centre for Scientific Research (CNRS) in Limoges on microwave devices for telecommunication companies. In 2008, he was an Australian Research Council postdoctoral fellow with a ARC International linkage scheme in the Frequency Standards and Metrology (FSM) Group located in the School of Physics at UWA in Perth. Then in 2009, he has been appointed with a 3-year position as an ARC APD in the FSM Group then followed by a two-year contract as a research associate where his current work involves designing low phase noise oscillators at extremely high frequencies (EHF), and generate very high stable source in millimeter waves. Since 2012, he has been appointed to work on material characterization of new samples for quantum physics experiments such as spin interactions and single photons at milli-Kelvin temperature. In 2014, he finally found interest in applying quantum and microwave technologies together for developing sensing instruments. He is currently looking for new opportunities in biology, and medical domains. He developed hybrid systems for ODMR and strong coupling interface with diamond and nano-diamond towards quantum information and engineering low-cost MRI sensors of parasites such as malaria and schistosomiasis, two deadliest parasites on Earth in equatorial regions. In 2015, first, he has been visiting professor at Huazhong University of Science and Technology (HUST) and then he took in September an associate professor position to build a cryogenic sapphire oscillator.
2007，Double-badged PhD in High frequencies and Optoelectronics Engineering and Physics, The University of Limoges, in France and The University of Western Australia, in Australia -- Very High Distinction
Title: Design of High-Q factor dielectric resonators for metrology application.
Description: This thesis explored the idea of Bragg resonators for building very-high Q-factor devices for room temperature metrology applications.
China，2015 – present: Associate Professor,Center for Gravitational Experiments - School of Physics, Huazhong University of Science and Technology, People’s Republic of China.
Australia，2008 – 2014: Research Assistant Professor,Frequency Standards and Metrology Group - School of Physics, The University of Western Australia, Australia.
France，2007 – 2008:Contracted Engineer,National Centre for Scientific Research (CNRS) - UMR6172 XLIM Research institute, The University of Limoges, France.
Farr, W., Goryachev, M., Le Floch, S.R.,Le Floch, J-M., M.E. Tobar, "Evidence of dilute ferromagnetism in rare-earth doped yttrium aluminium garnet,"Applied Physics Letters, 122401, doi:10.1063/1.4931432, 2015
Goryachev, M., Farr, W.G., Carmo Carvalho, N.D., Creedon, D.L.,Le Floch, J-M., Probst, S., Bushev, P., Tobar, M.E., "Discovery of iron group impurity ion spin states in single crystal Y2SiO5 with strong coupling to whispering gallery photons,"Applied Physics Letters, 106(23), 232401, doi:10.1063/1.4922376, 2015
Carvalho, N.C.,Le Floch, J.-M., Krupka, J., Tobar, M.E., "Multi-mode technique for the determination of the biaxial Y2SiO5 permittivity tensor from 300 to 6 K,"Applied Physics Letters, 106(19), 192904, doi:10.1063/1.4920987, 2015
Creedon, D.L.,Le Floch, J.-M., Goryachev, M., Farr, W.G., Castelletto, S., Tobar, M.E., "Strong coupling between P1 diamond impurity centers and a three-dimensional lumped photonic microwave cavity,"Physical Review B - Condensed Matter and Materials Physics, 91(14), 140408, doi:10.1103/PhysRevB.91.140408, 2015
Probst, S., Tkalcec, A., Rotzinger, H., Rieger, D.,Le Floch, J-M., Goryachev, M., Tobar, M.E., Ustinov, A. V., Bushev, P. A., "Three-dimensional cavity quantum electrodynamics with a rare-earth spin ensemble,"Physical Review B - Condensed Matter and Materials Physics, 90(10), 100404, doi:10.1103/PhysRevB.90.100404, 2014
Le Floch, J.-M., Bradac, C., Nand, N., Castelletto, S., Tobar, M.E., Volz, T., "Addressing a single spin in diamond with a macroscopic dielectric microwave cavity,"Applied Physics Letters, 105(13), 133101, doi:10.1063/1.4896858, 2014
Queffelec, 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., "Intercomparison of permittivity measurement techniques for ferroelectric thin layers,"Journal of Applied Physics, 115(2), 024103, doi:10.1063/1.4858388, 2014
Nand, N.R., Goryachev, M.,Le Floch, J.-M., Creedon, D.L., Tobar, M.E., "Hyperparametric effects in a whispering-gallery mode rutile dielectric resonator at liquid helium temperatures,"Journal of Applied Physics, 116(13), 134105, doi:10.1063/1.4897164, 2014
Le Floch, J.-M., Fan, Y., Humbert, G., Shan, Q., Férachou, D., Bara-Maillet, R., Aubourg, M., Hartnett, J.G., Madrangeas, V., Cros, D., Blondy, J.-M., Krupka, J., Tobar, M.E., "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,"Review of Scientific Instruments, 85(3), 6838804, doi:10.1063/1.4867461, 2014
Nand, N.R., Parker, S.R., Ivanov, E.N.,Le Floch, J.-M., Hartnett, J.G., Tobar, M.E., "Resonator power to frequency conversion in a cryogenic sapphire oscillator,"Applied PhysicsLetters, 103(4), 043502, doi:10.1063/1.4816284, 2013
Benmessai, K., Farr, W.G., Creedon, D.L., Reshitnyk, Y.,Le Floch, J.-M., Duty, T., Tobar, M.E., "Hybrid electron spin resonance and whispering gallery mode resonance spectroscopy of Fe3+ in sapphire,"Physical Review B - Condensed Matter and Materials Physics, 87(9), 094412, doi:10.1103/PhysRevB.87.094412, 2013
Le Floch, J.-M., Bara, R., Hartnett, J.G., Tobar, M.E., Mouneyrac, D., Passerieux, D., Cros, D., Krupka, J., Goy, P., Caroopen, S., "Electromagnetic properties of polycrystalline diamond from 35 K to room temperature and microwave to terahertz frequencies,"Journal of AppliedPhysics, 109(9), 094103, doi:10.1063/1.3580903, 2011
Hartnett, J.G., Mouneyrac, D., Krupka, J.,Le Floch, J.-M., Tobar, M.E., Cros, D., "Microwave properties of semi-insulating silicon carbide between 10 and 40 GHz and at cryogenic temperatures,"Journal of Applied Physics, 109(6), 064107, doi:2011082901123256, 2011
Awards and Honors
• National Natural Science Foundation of China , Grant No. 91536109
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