All Outputs (100)

Modelling spectra of hot alkali vapour in the saturation regime (2025)
Journal Article
Häupl, D. R., Higgins, C. R., Pizzey, D., Briscoe, J. D., Wrathmall, S. A., Hughes, I. G., Löw, R., & Joly, N. Y. (2025). Modelling spectra of hot alkali vapour in the saturation regime. New Journal of Physics, 27, Article 033003. https://doi.org/10.1088/1367-2630/adb77c

Laser spectroscopy of hot atomic vapours has been studied extensively. Theoretical models that predict the absolute value of the electric susceptibility are crucial for optimising the design of photonic devices that use hot vapours, and for extractin... Read More about Modelling spectra of hot alkali vapour in the saturation regime.

Fine-structure changing collisions in 87 Rb upon D 2 excitation in the hyperfine Paschen-Back regime (2024)
Journal Article
Higgins, C. R., Pizzey, D., & Hughes, I. G. (2024). Fine-structure changing collisions in 87 Rb upon D 2 excitation in the hyperfine Paschen-Back regime. Journal of Physics B: Atomic, Molecular and Optical Physics, 57(23), Article 235002. https://doi.org/10.1088/1361-6455/ad8ab0

We investigate fine structure changing collisions in 87Rb vapour upon D2 excitation in a thermal vapour at 75 ∘C; the atoms are placed in a 0.6 T axial magnetic field in order to gain access to the hyperfine Pashen-Back regime. Following optical exci... Read More about Fine-structure changing collisions in 87 Rb upon D 2 excitation in the hyperfine Paschen-Back regime.

Indirect measurement of atomic magneto-optical rotation via Hilbert transform (2024)
Journal Article
Briscoe, J. D., Pizzey, D., Wrathmall, S. A., & Hughes, I. G. (2024). Indirect measurement of atomic magneto-optical rotation via Hilbert transform. Journal of Physics B: Atomic, Molecular and Optical Physics, 57(17), 175401. https://doi.org/10.1088/1361-6455/ad5e24

The Kramers–Kronig relations are a pivotal foundation of linear optics and atomic physics, embedding a physical connection between the real and imaginary components of any causal response function. A mathematically equivalent, but simpler, approach i... Read More about Indirect measurement of atomic magneto-optical rotation via Hilbert transform.

A device for magnetic-field angle control in magneto-optical filters using a solenoid-permanent magnet pair. (2024)
Journal Article
Alqarni, S. A., Briscoe, J. D., Higgins, C. R., Logue, F. D., Pizzey, D., Robertson-Brown, T. G., & Hughes, I. G. (2024). A device for magnetic-field angle control in magneto-optical filters using a solenoid-permanent magnet pair. Review of Scientific Instruments, 95(3), Article 035103. https://doi.org/10.1063/5.0174264

Atomic bandpass filters are used in a variety of applications due to their narrow bandwidths and high transmission at specific frequencies. Predominantly, these filters are in the Faraday (Voigt) geometry, using an applied axial (transverse) magnetic... Read More about A device for magnetic-field angle control in magneto-optical filters using a solenoid-permanent magnet pair..

Voigt transmission windows in optically thick atomic vapours: a method to create single-peaked line centre filters (2023)
Journal Article
Briscoe, J. D., Logue, F. D., Pizzey, D., Wrathmall, S. A., & Hughes, I. G. (2023). Voigt transmission windows in optically thick atomic vapours: a method to create single-peaked line centre filters. Journal of Physics B: Atomic, Molecular and Optical Physics, 56(10), Article 105403. https://doi.org/10.1088/1361-6455/acc49c

Cascading light through two thermal vapour cells has been shown to improve the performance of atomic filters that aim to maximise peak transmission over a minimised bandpass window. In this paper, we explore the atomic physics responsible for the ope... Read More about Voigt transmission windows in optically thick atomic vapours: a method to create single-peaked line centre filters.

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit (2022)
Journal Article
Pizzey, D., Briscoe, J. D., Logue, F. D., Ponciano-Ojeda, F. S., Wrathmall, S. A., & Hughes, I. G. (2022). Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit. New Journal of Physics, 24, https://doi.org/10.1088/1367-2630/ac9cfe

The spectroscopy of hot atomic vapours is a hot topic. Many of the work-horse techniques of contemporary atomic physics were first demonstrated in hot vapours. Alkali-metal atomic vapours are ideal media for quantum-optics experiments as they combine... Read More about Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit.

Better magneto-optical filters with cascaded vapor cells (2022)
Journal Article
Logue, F. D., Briscoe, J. D., Pizzey, D., Wrathmall, S. A., & Hughes, I. G. (2022). Better magneto-optical filters with cascaded vapor cells. Optics Letters, 47(12), 2975-2978. https://doi.org/10.1364/ol.459291

Single-cell magneto-optical Faraday filters find great utility and are realized with either ‘wing’ or ‘line center’ spectral profiles. We show that cascading a second cell with independent axial (Faraday) or transverse (Voigt) magnetic field leads to... Read More about Better magneto-optical filters with cascaded vapor cells.

The Solar Activity Monitor Network – SAMNet (2022)
Journal Article
Erdélyi, R., Korsós, M. B., Huang, X., Yang, Y., Pizzey, D., Wrathmall, S. A., Hughes, I. G., Dyer, M. J., Dhillon, V. S., Belucz, B., Brajša, R., Chatterjee, P., Cheng, X., Deng, Y., Domínguez, S. V., Joya, R., Gömöry, P., Gyenge, N. G., Hanslmeier, A., Kucera, A., …Zuccarello, F. (2022). The Solar Activity Monitor Network – SAMNet. Journal of Space Weather and Space Climate, 12, Article 2. https://doi.org/10.1051/swsc/2021025

The Solar Activity Magnetic Monitor (SAMM) Network (SAMNet) is a future UK-led international network of ground-based solar telescope stations. SAMNet, at its full capacity, will continuously monitor the Sun’s intensity, magnetic, and Doppler velocity... Read More about The Solar Activity Monitor Network – SAMNet.

Using residual heat maps to visualise Benford’s multi-digit law (2021)
Journal Article
Hull, B., Long, A., & Hughes, I. G. (2022). Using residual heat maps to visualise Benford’s multi-digit law. European Journal of Physics, 43(1), Article 015803. https://doi.org/10.1088/1361-6404/ac3671

It has been known for more than a century that, counter to one's intuition, the frequency of occurrence of the first significant digit in a very large number of numerical data sets is nonuniformly distributed. This result is encapsulated in Benford's... Read More about Using residual heat maps to visualise Benford’s multi-digit law.

White-light versus discrete wavelength measurements of Faraday dispersion and the Verdet constant (2021)
Journal Article
Maxwell, J. L., Hughes, I. G., & Adams, C. S. (2022). White-light versus discrete wavelength measurements of Faraday dispersion and the Verdet constant. European Journal of Physics, 43(1), Article 015302. https://doi.org/10.1088/1361-6404/ac31d3

The wavelength dependence of the Faraday effect may be measured either sequentially at particular wavelengths using narrow band sources, or simultaneously at many wavelengths using a white-light or broadband source. We apply both methods to measure t... Read More about White-light versus discrete wavelength measurements of Faraday dispersion and the Verdet constant.

Electromagnetically induced transparency in a V-system with 87Rb vapor in the hyperfine Paschen–Back regime (2021)
Journal Article
Higgins, C. R., & Hughes, I. G. (2021). Electromagnetically induced transparency in a V-system with 87Rb vapor in the hyperfine Paschen–Back regime. Optics Letters, 54(16), Article 165403. https://doi.org/10.1088/1361-6455/ac20be

We observe electromagnetically induced transparency (EIT) in a V-system in a thermal rubidium-87 vapour in the hyperfine Paschen-Back regime, realised with a 0.6 T axial magnetic field. In this regime energy levels are no longer degenerate and EIT fe... Read More about Electromagnetically induced transparency in a V-system with 87Rb vapor in the hyperfine Paschen–Back regime.

The Raspberry Pi auto-aligner: Machine learning for automated alignment of laser beams (2021)
Journal Article
Mathew, R. S., O’Donnell, R., Pizzey, D., & Hughes, I. G. (2021). The Raspberry Pi auto-aligner: Machine learning for automated alignment of laser beams. Review of Scientific Instruments, 92(1), Article 015117. https://doi.org/10.1063/5.0032588

We present a novel solution to automated beam alignment optimization. This device is based on a Raspberry Pi computer, stepper motors, commercial optomechanics and electronic devices, and the open-source machine learning algorithm M-LOOP. We provide... Read More about The Raspberry Pi auto-aligner: Machine learning for automated alignment of laser beams.

Absorption spectroscopy and Stokes polarimetry in a 87Rb vapour in the Voigt geometry with a 1.5 T external magnetic field (2020)
Journal Article
Ponciano-Ojeda, F. S., Logue, F. D., & Hughes, I. G. (2021). Absorption spectroscopy and Stokes polarimetry in a 87Rb vapour in the Voigt geometry with a 1.5 T external magnetic field. Journal of Physics B: Atomic, Molecular and Optical Physics, 54(1), Article 015401. https://doi.org/10.1088/1361-6455/abc7ff

This paper provides details of a spectroscopic investigation of a thermal 87Rb atomic vapour. The experiment was conducted with an external magnetic field of 1.5 T in the Voigt geometry. Very good quantitative agreement between experimental data and... Read More about Absorption spectroscopy and Stokes polarimetry in a 87Rb vapour in the Voigt geometry with a 1.5 T external magnetic field.

Nanostructured alkali-metal vapor cells (2020)
Journal Article
Cutler, T., Hamlyn, W., Renger, J., Whittaker, K., Pizzey, D., Hughes, I., Sandoghdar, V., & Adams, C. (2020). Nanostructured alkali-metal vapor cells. Physical Review Applied, 14(3), Article 034054. https://doi.org/10.1103/physrevapplied.14.034054

Atom-light interactions in micro- and nanoscale systems hold great promise for alternative technologies based on integrated emitters and optical modes. We present the design architecture, construction method, and characterization of an all-glass alka... Read More about Nanostructured alkali-metal vapor cells.

Atomic line vs. lens cavity filters: A comparison of their merits (2020)
Journal Article
Higgins, C. R., Pizzey, D., Mathew, R. S., & Hughes, I. G. (2020). Atomic line vs. lens cavity filters: A comparison of their merits. OSA continuum, 3(4), 961-970. https://doi.org/10.1364/osac.390604

We present a comparison between lens cavity filters and atomic line filters, discussing their relative merits for applications in quantum optics. We describe the design, characterization, and stabilization procedure of a lens cavity filter, which con... Read More about Atomic line vs. lens cavity filters: A comparison of their merits.

Optical rotation of white light (2020)
Journal Article
Anderson, J., Gillen, C., Wright, J., Adams, C. S., & Hughes, I. G. (2020). Optical rotation of white light. American Journal of Physics, 88(3), https://doi.org/10.1119/10.0000390

Plane-polarized monochromatic light is rotated in an optically active medium. The extent of the rotation is wavelength dependent, following an optical rotatory dispersion (ORD) curve. Typically, this phenomenon is studied by using a few discrete wave... Read More about Optical rotation of white light.

Measuring the Faraday effect in olive oil using permanent magnets and Malus' law (2020)
Journal Article
Carr, D. L., Spong, N. L., Hughes, I. G., & Adams, C. S. (2020). Measuring the Faraday effect in olive oil using permanent magnets and Malus' law. European Journal of Physics, 41(2), Article 025301. https://doi.org/10.1088/1361-6404/ab50dd

We present a simple permanent magnet set-up that can be used to measure the Faraday effect in gases, liquids and solids. By fitting the transmission curve as a function of polarizer angle (Malus' law) we average over short-term fluctuations in the la... Read More about Measuring the Faraday effect in olive oil using permanent magnets and Malus' law.

Lattice-depth measurement using continuous grating atom diffraction (2019)
Journal Article
Beswick, B. T., Hughes, I. G., & Gardiner, S. A. (2019). Lattice-depth measurement using continuous grating atom diffraction. Physical Review A, 100(6), Article 063629. https://doi.org/10.1103/physreva.100.063629

We propose an approach to characterizing the depths of optical lattices, in which either an atomic gas is given a finite initial momentum or, alternatively, a corresponding “walking” configuration is applied to the optical lattice itself. This leads... Read More about Lattice-depth measurement using continuous grating atom diffraction.

Measurement of the atom-surface van der Waals interaction by transmission spectroscopy in a wedged nanocell (2019)
Journal Article
Peyrot, T., Šibalić, N., Sortais, Y., Browaeys, A., Sargsyan, A., Sarkisyan, D., Hughes, I., & Adams, C. (2019). Measurement of the atom-surface van der Waals interaction by transmission spectroscopy in a wedged nanocell. Physical Review A, 100(2), Article 022503. https://doi.org/10.1103/physreva.100.022503

We demonstrate a method for measuring atom-surface interactions using transmission spectroscopy of thermal vapors confined in a wedged nanocell. The wedged shape of the cell allows complementary measurements of both the bulk atomic vapor and atoms cl... Read More about Measurement of the atom-surface van der Waals interaction by transmission spectroscopy in a wedged nanocell.

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.