Outputs (20)

Optical Transmission of an Atomic Vapor in the Mesoscopic Regime (2019)
Journal Article
Peyrot, T., Sortais, Y., Greffet, J.-J., Browaeys, A., Sargsyan, A., Keaveney, J., Hughes, I., & Adams, C. (2019). Optical Transmission of an Atomic Vapor in the Mesoscopic Regime. Physical Review Letters, 122(11), Article 113401. https://doi.org/10.1103/physrevlett.122.113401

By measuring the transmission of near-resonant light through an atomic vapor confined in a nanocell we demonstrate a mesoscopic optical response arising from the nonlocality induced by the motion of atoms with a phase coherence length larger than the... Read More about Optical Transmission of an Atomic Vapor in the Mesoscopic Regime.

Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry (2018)
Journal Article
Keaveney, J., Wrathmall, S. A., Adams, C. S., & Hughes, I. G. (2018). Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry. Optics Letters, 43(17), 4272-4275. https://doi.org/10.1364/ol.43.004272

Atomic bandpass filters are widely used in a variety of applications, owing to their high peak transmission and narrow bandwidths. Much of the previous literature has used the Faraday effect to realize these filters, where an axial magnetic field is... Read More about Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry.

Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen-Back regime (2018)
Journal Article
Mathew, R. S., Ponciano-Ojeda, F., Keaveney, J., Whiting, D., & Hughes, I. (2018). Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen-Back regime. Optics Letters, 43(17), 4204-4207. https://doi.org/10.1364/ol.43.004204

We demonstrate a technique to lock simultaneously two laser frequencies to each step of a two-photon transition in the presence of a magnetic field sufficiently large to gain access to the hyperfine Paschen–Back regime. A ladder configuration with th... Read More about Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen-Back regime.

Collective Lamb shift of a nanoscale atomic vapor layer within a sapphire cavity (2018)
Journal Article
Peyrot, T., Keaveney, J., Sortais, Y. R., Sargsyan, A., Sarkisyan, D., Hughes, I. G., …Adams, C. S. (2018). Collective Lamb shift of a nanoscale atomic vapor layer within a sapphire cavity. Physical Review Letters, 120(24), Article 243401. https://doi.org/10.1103/physrevlett.120.243401

We measure the near-resonant transmission of light through a dense medium of potassium vapor confined in a cell with nanometer thickness in order to investigate the origin and validity of the collective Lamb shift. A complete model including the mult... Read More about Collective Lamb shift of a nanoscale atomic vapor layer within a sapphire cavity.

Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements (2018)
Journal Article
Keaveney, J. (2018). Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements. Review of Scientific Instruments, 89(3), Article 035114. https://doi.org/10.1063/1.5022973

We present a simple and convenient, high-resolution solution for automated laser-beam profiling with axial translation. The device is based on a Raspberry Pi computer, Pi Noir CMOS camera, stepper motor, and commercial translation stage. We also prov... Read More about Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements.

ElecSus: Extension to arbitrary geometry magneto-optics (2017)
Journal Article
Keaveney, J., Adams, C. S., & Hughes, I. G. (2017). ElecSus: Extension to arbitrary geometry magneto-optics. Computer Physics Communications, 224, 311-324. https://doi.org/10.1016/j.cpc.2017.12.001

We present a major update to ElecSus, a computer program and underlying model to calculate the electric susceptibility of an alkali-metal atomic vapour. Knowledge of the electric susceptibility of a medium is essential to predict its absorptive and d... Read More about ElecSus: Extension to arbitrary geometry magneto-optics.

Four-wave mixing in a non-degenerate four-level diamond configuration in the hyperfine Paschen–Back regime (2017)
Journal Article
Whiting, D. J., Mathew, R. S., Keaveney, J., Adams, C. S., & Hughes, I. G. (2018). Four-wave mixing in a non-degenerate four-level diamond configuration in the hyperfine Paschen–Back regime. Journal of Modern Optics, 65(2), 119-128. https://doi.org/10.1080/09500340.2017.1377308

We present an experimental study of seeded four-wave mixing (4WM) using a diamond excitation scheme (with states from the 5S1/2,5P1/2,5P3/25S1/2,5P1/2,5P3/2 and 5D3/25D3/2 terms) in a thermal vapour of 87Rb87Rb atoms. We investigate the 4WM spectra u... Read More about Four-wave mixing in a non-degenerate four-level diamond configuration in the hyperfine Paschen–Back regime.

Single-photon interference due to motion in an atomic collective excitation (2017)
Journal Article
Whiting, D. J., Šibalić, N., Keaveney, J., Adams, C. S., & Hughes, I. G. (2017). Single-photon interference due to motion in an atomic collective excitation. Physical Review Letters, 118(25), Article 253601. https://doi.org/10.1103/physrevlett.118.253601

We experimentally demonstrate the generation of heralded bi-chromatic single photons from an atomic collective spin excitation (CSE). The photon arrival times display collective quantum beats, a novel interference effect resulting from the relative m... Read More about Single-photon interference due to motion in an atomic collective excitation.

A single-mode external cavity diode laser using an intra-cavity atomic Faraday filter with short-term linewidth <400 kHz and long-term stability of <1 MHz (2016)
Journal Article
Keaveney, J., Hamlyn, W. J., Adams, C. S., & Hughes, I. G. (2016). A single-mode external cavity diode laser using an intra-cavity atomic Faraday filter with short-term linewidth

We report on the development of a diode laser system - the “Faraday laser” - using an atomic Faraday filter as the frequency-selective element. In contrast to typical external-cavity diode laser systems which offer tunable output frequency but requir... Read More about A single-mode external cavity diode laser using an intra-cavity atomic Faraday filter with short-term linewidth <400 kHz and long-term stability of <1 MHz.

Direct measurement of excited-state dipole matrix elements using electromagnetically induced transparency in the hyperfine Paschen-Back regime (2016)
Journal Article
Whiting, D., Keaveney, J., Adams, C., & Hughes, I. (2016). Direct measurement of excited-state dipole matrix elements using electromagnetically induced transparency in the hyperfine Paschen-Back regime. Physical Review A, 93(4), Article 043854. https://doi.org/10.1103/physreva.93.043854

Applying large magnetic fields to gain access to the hyperfine Paschen-Back regime can isolate three-level systems in a hot alkali metal vapors, thereby simplifying usually complex atom-light interactions. We use this method to make the first direct... Read More about Direct measurement of excited-state dipole matrix elements using electromagnetically induced transparency in the hyperfine Paschen-Back regime.