267 citations · 2.4k across the 42 of their papers we have counts for
33 papers · 1 filter
Optical studies of negative g-factor dopants in an antiferromagnet: Nd:GdVO
Lachlan W. Cronin, Masaya Hiraishi, Luke S. Trainor +1
Neodymium-doped gadolinium vanadate (Nd:GdVO) is a popular laser material at room temperature. It has received limited attention for quantum technologies because of the linebro…
Optical spectroscopy of single- and two-ion transitions in an antiferromagnetic stoichiometric rare-earth crystal
Masaya Hiraishi, Gabrielle A. Hunter-Smith, Gavin G. G. King +5
We characterise optical transitions of neodymium ions (Nd3+) in antiferromagnetic neodymium gallate (NdGaO3) with applied fields up to 3 T. The magnetic phase of this material has…
Long optical coherence times and coherent rare earth-magnon coupling in a rare earth doped anti-ferromagnet
Masaya Hiraishi, Zachary H. Roberts, Gavin G. G. King +2
Rare-earth ions are characterised by transitions with very narrow linewidths even in solid state crystals. Exceedingly long coherence times have been shown on both spin and optical…
Triply Resonant Microwave to Optical Conversion in Erbium-170 Doped Yttrium Orthosilicate
Gavin G. G. King, Luke S. Trainor, Jevon J. Longdell
We report microwave to optical upconversion in isotopically purified erbium-doped yttrium orthosilicate in a Fabry-Pérot resonator at millikelvin temperatures. This follows on from…
Microwave-optical double resonance in a erbium-doped whispering-gallery-mode resonator
Li Ma, Luke S. Trainor, Gavin G. G. King +2
We showcase an erbium-doped whispering-gallery-mode resonator with optical modes that display intrinsic quality factors better than (linewidths less than 2 MHz), and couplin…
The Zeeman and hyperfine interactions of a single ion in Si
Jiliang Yang, Wenda Fan, Yangbo Zhang +10
Er-doped Si is a promising candidate for quantum information applications due to its telecom wavelength optical transition and its compatibility with Si nanofabrication technologie…
Probing Strong Coupling between a Microwave Cavity and a Spin Ensemble with Raman Heterodyne Spectroscopy
Gavin G. G. King, Peter S. Barnett, John G. Bartholomew +2
Raman heterodyne spectroscopy is a powerful tool for characterizing the energy and dynamics of spins. The technique uses an optical pump to transfer coherence from a spin transitio…
Theory of Microwave-Optical Conversion Using Rare-Earth Ion Dopants
Peter S. Barnett, Jevon J. Longdell
We develop a theoretical description of a device for coherent conversion of microwave to optical photons. For the device, dopant ions in a crystal are used as three-level systems,…
Optically unstable phase from ion-ion interactions in an erbium doped crystal
Yu-Hui Chen, Sebastian P. Horvath, Jevon J. Longdell +1
We demonstrate an optical unstable phase for a laser driven erbium ion ensemble. The transmitted light through an erbium-doped yttrium orthosillicate crystal becomes dynamically un…
Microwave to optical photon conversion via fully concentrated rare-earth ion crystals
Jonathan. R. Everts, Matthew. C. Berrington, Rose. L. Ahlefeldt +1
Most investigations of rare earth ions in solids for quantum information have used rare earth ion doped crystals. Here we analyse the conversion of quantum information from microwa…
Long spin coherence times in the ground state and an optically excited state of Er:YSiO at zero magnetic field
Jelena V. Rakonjac, Yu-Hui Chen, Sebastian P. Horvath +1
Spins in solids are an ideal candidate to act as a memory and interface with superconducting qubits due to their long coherence times. We spectroscopically investigate erbium-167-d…
Cavity enhanced Raman heterodyne spectroscopy in Er:YSO for microwave to optical signal conversion
Xavier Fernandez-Gonzalvo, Sebastian P. Horvath, Yu-Hui Chen +1
The efficiency of the frequency conversion process at the heart of Raman heterodyne spectroscopy was improved by nearly four orders of magnitude by resonant enhancement of both the…
Generation of light with multimode time-delayed entanglement using storage in a solid state spin-wave quantum memory
Kate R. Ferguson, Sarah E. Beavan, Jevon J. Longdell +1
Here we demonstrate generating and storing entanglement in a solid state spin-wave quantum memory with on-demand read out using the process of rephased amplified spontaneous emissi…
Coupling erbium spins to a three-dimensional superconducting cavity at zero magnetic field
Yu-Hui Chen, Xavier Fernandez-Gonzalvo, Jevon J. Longdell
We experimentally demonstrate the coupling at zero magnetic field of an isotopically pure erbium doped yttrium orthosilicate crystal (Er:YSO) to a three-dimensional superco…
Coherent frequency up-conversion of microwaves to the optical telecommunications band in an Er:YSO crystal
Xavier Fernandez-Gonzalvo, Yu-Hui Chen, Chunming Yin +2
The ability to convert quantum states from microwave photons to optical photons is important for hybrid system approaches to quantum information processing. In this paper we report…
Cavity enhanced rephased amplified spontaneous emission
Lewis A Williamson, Jevon J Longdell
Amplified spontaneous emission is usually treated as an incoherent noise process. Recent theoretical and experimental work using rephasing optical pulses has shown that rephased am…
A magneto-optic modulator with unit quantum effciency
Lewis A. Williamson, Yu-Hui Chen, Jevon J. Longdell
We propose a device for the reversible and quiet conversion of microwave photons to optical sideband photons, that can reach 100% quantum effciency. The device is based on an erbiu…
Experimental realization of light with time separated correlations by rephasing amplified spontaneous emission
Patrick M. Ledingham, William R. Naylor, Jevon J. Longdell
Amplified spontaneous emission is a common noise source in active optical systems, it is generally seen as being an incoherent process. Here we excite an ensemble of rare earth ion…
Coherent spectroscopy of rare-earth-ion doped whispering-gallery mode resonators
D. L. McAuslan, D. Korystov, J. J. Longdell
We perform an investigation into the properties of Pr3+:Y2SiO5 whispering gallery mode resonators as a first step towards achieving the strong coupling regime of cavity QED with ra…
Photon echo quantum memories in inhomogeneously broadened two level atoms
D. L. McAuslan, P. M. Ledingham, W. R. Naylor +4
Here we propose a solid-state quantum memory that does not require spectral holeburning, instead using strong rephasing pulses like traditional photon echo techniques. The memory u…
Photon echo without a free induction decay in a double-Lambda system
Sarah E. Beavan, Patrick M. Ledingham, Jevon J. Longdell +1
We have characterized a novel photon-echo pulse sequence for a double- type energy level system where the input and rephasing transitions are different to the applied -pulses…
Strong coupling cavity QED using rare-earth-ion dopants in monolithic resonators: what you can do with a weak oscillator
D. L. McAuslan, J. J. Longdell, M. J. Sellars
We investigate the possibility of achieving the strong coupling regime of cavity quantum electrodynamics using rare earth ions as impurities in monolithic optical resonators. We co…
Non-classical photon streams using rephased amplified spontaneous emission
Patrick M. Ledingham, William R. Naylor, Jevon J. Longdell +2
We present a fully quantum mechanical treatment of optically rephased photon echoes. These echoes exhibit noise due to amplified spontaneous emission, however this noise can be see…
Analytic treatment of CRIB Quantum Memories for Light using Two-level Atoms
J. J. Longdell, G. Hétet, M. J. Sellars +1
It has recently been discovered that the optical analogue of a gradient echo in an optically thick material could form the basis of a optical memory that is both completely efficie…