Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Farr, Warrick G."'
Autor:
Goryachev, Maxim, Zhao, Lingfei, Zhao, Zijun, Farr, Warrick G., Krupka, Jerzy, Tobar, Michael E.
The dielectric properties of strontium titanate (SrTiO$_3$) have previously been reported from room temperature to low temperatures with conflicting results. In this work, precision measurement of the permittivity is undertaken by simultaneously meas
Externí odkaz:
http://arxiv.org/abs/1508.07550
Publikováno v:
Phys. Rev. A 92, 023805 (2015)
We present evidence for collective action of Cr$^{3+}$ ion impurities in a highly doped ruby crystal at microwave frequencies. The cylindrical geometry of the crystal allows for the creation of a superradiant, or "spin-mode" doublet, with spatial str
Externí odkaz:
http://arxiv.org/abs/1504.07733
Autor:
Creedon, Daniel L., Floch, Jean-Michel Le, Goryachev, Maxim, Farr, Warrick G., Castelletto, Stefania, Tobar, Michael E.
Publikováno v:
Phys. Rev. B 91, 140408(R) 2015
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 that the magnetic component of the cavity field is spatially separated f
Externí odkaz:
http://arxiv.org/abs/1412.4331
Autor:
Goryachev, Maxim, Farr, Warrick G., Carvalho, Natalia C., Creedon, Daniel L., Floch, Jean-Michel Le, Probst, Sebastian, Bushev, Pavel, Tobar, Michael E.
Publikováno v:
Appl. Phys. Lett. 106, 232401 (2015)
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 Processing applications. In the present work, WGM spectroscopy of Rare-E
Externí odkaz:
http://arxiv.org/abs/1410.6578
Publikováno v:
Phys. Rev. B 90, 054409 (2014)
We report the study of interactions between cavity photons and paramagnetic Cr$^{3+}$ spins in a ruby (Cr$^{3+}$:Al$_2$O$_3$) Whispering Gallery mode (WGM) resonator. Examining the system at microwave frequencies and millikelvin temperatures, spin-ph
Externí odkaz:
http://arxiv.org/abs/1408.2944
Autor:
Goryachev, Maxim, Farr, Warrick G., Creedon, Daniel L., Fan, Yaohui, Kostylev, Mikhail, Tobar, Michael E.
Publikováno v:
Phys. Rev. Applied 2, 054002 (2014)
Using a sub-millimetre sized YIG (Yttrium Iron Garnet) sphere mounted in a magnetic field-focusing cavity, we demonstrate an ultra-high cooperativity of $10^5$ between magnon and photon modes at millikelvin temperatures and microwave frequencies. The
Externí odkaz:
http://arxiv.org/abs/1408.2905
Publikováno v:
Appl. Phys. Lett. 105, 063501 (2014)
We demonstrate a previously unobserved nonlinear phenomenon in an ultra-low loss quartz Bulk Acoustic Wave cavity ($Q>3\times10^9$), which only occurs below 20 milli-Kelvin in temperature and under relatively weak pumping. The phenomenon reveals the
Externí odkaz:
http://arxiv.org/abs/1406.3880
Publikováno v:
Phys. Rev. B 89, 224407 (2014)
Employing a sapphire whispering gallery mode resonator, we demonstrate features of the spin-photon interaction in cavities with broken time-reflection symmetry. The broken symmetry leads to a lifting of the degeneracy between left-handed and right-ha
Externí odkaz:
http://arxiv.org/abs/1405.7458
Publikováno v:
Phys. Rev. A 89, 013810 (2014)
A combination of electron spin interactions in a magnetic field allows us to control the resonance frequencies of a high-Q Whispering Gallery (WG) cavity mode doublet, resulting in precise measurements of an avoided crossing between the two modes com
Externí odkaz:
http://arxiv.org/abs/1312.6739
Publikováno v:
Appl. Phys. Lett, Vol, 104, 1, 2013
We report the observation of $g$-factors of natural paramagnetic impurities in a pure synthetic quartz crystal at milli-Kelvin temperatures. Measurements are made by performing spectroscopy using multiple high-$Q$ Whispering Gallery Modes sustained i
Externí odkaz:
http://arxiv.org/abs/1312.3690