657 citations · 878 across the 12 of their papers we have counts for
12 papers
Driven quadrature and spin squeezing in a cavity-coupled ensemble of two-level states
Haitham A. R. El-Ella
The generated magnitude of quadrature squeezing in a cavity-coupled ensemble, which is continuously driven using a coherent off-axis field, is theoretically explored. Using a trunc…
Observation of the Magneto-Optic Voigt Effect in a Paramagnetic Diamond Membrane
Haitham A. R. El-Ella, Kristian H. Rasmussen, Alexander Huck +2
The magneto-optic Voigt effect is observed in a synthetic diamond membrane with a substitutional nitrogen defect concentration in the order of 200 ppm and a nitrogen-vacancy defect…
Continuous microwave hole burning and population oscillations in a diamond spin ensemble
Haitham A. R. El-Ella, Alexander Huck, Ulrik L. Andersen
Continuous spectral hole burning and spin-level population oscillations are studied in an inhomogeneously broadened diamond-based spin ensemble composed of substitutional nitrogen…
Magnon Condensation in a Dense Nitrogen-Vacancy Spin Ensemble
Haitham A. R. El-Ella
The feasibility of creating a Bose-Einstein condensate of magnons using a dense ensemble of nitrogen-vacancy spin defects in diamond is investigated. Through assessing a density-de…
Clock transition by continuous dynamical decoupling of a three-level system
Alexander Stark, Nati Aharon, Alexander Huck +4
We present a novel continuous dynamical decoupling scheme for the construction of a robust qubit in a three-level system. By means of a clock transition adjustment, we first show h…
Nitrogen-Vacancy Ensemble Magnetometry Based on Pump Absorption
Sepehr Ahmadi, Haitham A. R. El-Ella, Adam M. Wojciechowski +4
We demonstrate magnetic field sensing using an ensemble of nitrogen-vacancy centers by recording the variation in the pump-light absorption due to the spin-polarization dependence…
Optimised frequency modulation for continuous-wave optical magnetic resonance sensing using nitrogen-vacancy ensembles
Haitham A. R. El-Ella, Sepehr Ahmadi, Adam M. Wojciechowski +2
Magnetometers based on ensembles of nitrogen-vacancy centres are a promising platform for continuously sensing static and low-frequency magnetic fields. Their combination with phas…
Pump-Enhanced Continuous-Wave Magnetometry using Nitrogen-Vacancy Ensembles
Sepehr Ahmadi, Haitham A. R. El-Ella, Jørn O. B. Hansen +2
Ensembles of nitrogen-vacancy centers in diamond are a highly promising platform for high-sensitivity magnetometry, whose efficacy is often based on efficiently generating and moni…
Enhanced DC-Field Metrology Using Nitrogen Vacancy Spins via Strong Collective Coupling and Fano-Scattering
Haitham A. R. El-Ella, Ulrik Lund Andersen, Alexander Huck
Nitrogen-vacancy ensembles promise an unprecedented combination of sensitivity and resolution for magnetic field sensing under ambient conditions. However, their full sensing poten…
Deterministic photon-emitter coupling in chiral photonic circuits
Immo Söllner, Sahand Mahmoodian, Sofie Lindskov Hansen +9
The ability to engineer photon emission and photon scattering is at the heart of modern photonics applications ranging from light harvesting, through novel compact light sources, t…
A full free spectral range tuning of p-i-n doped Gallium Nitride microdisk cavity
Nan Niu, Tsung-Li Liu, Igor Aharonovich +7
Effective, permanent tuning of the whispering gallery modes (WGMs) of p-i-n doped GaN microdisk cavity with embedded InGaN quantum dots over one free spectral range is successfully…
Controlled tuning of whispering gallery modes of GaN/InGaN microdisk cavities
Igor Aharonovich, Nan Niu, Fabian Rol +6
Controlled tuning of the whispering gallery modes of GaN/InGaN μ-disk cavities is demonstrated. The whispering gallery mode (WGM) tuning is achieved at room temperature by immersin…