Outputs (7)

Simultaneous multi-band radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver (2024)
Journal Article
Allinson, G., Jamieson, M. J., Mackellar, A. R., Downes, L. A., Adams, C. S., & Weatherill, K. J. (2024). Simultaneous multi-band radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver. Physical Review Research, 6(2), Article 023317. https://doi.org/10.1103/PhysRevResearch.6.023317

We demonstrate simultaneous detection of radio-frequency (RF) fields ranging from the very high-frequency (VHF) band (128 MHz) to terahertz frequencies (0.61 THz) using a caesium Rydberg-atom receiver. The RF fields are concurrently applied to a seri... Read More about Simultaneous multi-band radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver.

Simple Python tools for modelling few-level atom-light interactions (2023)
Journal Article
Downes, L. (2023). Simple Python tools for modelling few-level atom-light interactions. Journal of Physics B: Atomic, Molecular and Optical Physics, 56(22), 1-17. https://doi.org/10.1088/1361-6455/acee3a

Understanding the interactions between atoms and light is at the heart of atomic physics. Being able to ‘experiment’ with various system parameters, produce plots of the results and interpret these is very useful, especially for those new to the fiel... Read More about Simple Python tools for modelling few-level atom-light interactions.

A practical guide to terahertz imaging using thermal atomic vapour (2023)
Journal Article
Downes, L. A., Torralbo-Campo, L., & Weatherill, K. J. (2023). A practical guide to terahertz imaging using thermal atomic vapour. New Journal of Physics, 25, Article 035002. https://doi.org/10.1088/1367-2630/acb80c

This tutorial aims to provide details on the underlying principles and methodologies of atom-based terahertz imaging techniques. Terahertz imaging is a growing field of research which can provide complementary information to techniques using other re... Read More about A practical guide to terahertz imaging using thermal atomic vapour.

Rapid readout of terahertz orbital angular momentum beams using atom-based imaging (2022)
Journal Article
Downes, L. A., Whiting, D. J., Adams, C. S., & Weatherill, K. J. (2022). Rapid readout of terahertz orbital angular momentum beams using atom-based imaging. Optics Letters, 47(22), 6001-6004. https://doi.org/10.1364/ol.476945

We demonstrate the rapid readout of terahertz orbital angular momentum (OAM) beams using an atomic-vapor-based imaging technique. OAM modes with both azimuthal and radial indices are created using phase-only transmission plates. The beams undergo ter... Read More about Rapid readout of terahertz orbital angular momentum beams using atom-based imaging.

Terahertz electrometry via infrared spectroscopy of atomic vapor (2022)
Journal Article
Chen, S., Reed, D. J., MacKellar, A. R., Downes, L. A., Almuhawish, N. F., Jamieson, M. J., …Weatherill, K. J. (2022). Terahertz electrometry via infrared spectroscopy of atomic vapor. Optica, 9(5), 485-491. https://doi.org/10.1364/optica.456761

In recent years, the characterisation of radiation falling within the so-called ‘terahertz (THz) gap’ has become an ever more prominent issue due to the increasing use of THz systems in applications such as nondestructive testing, security screening,... Read More about Terahertz electrometry via infrared spectroscopy of atomic vapor.

THz electrometry with Rydberg atoms and all IR lasers (2021)
Presentation / Conference Contribution
Chen, S., Reed, D., Downes, L. A., MacKellar, A. R., Almuhawish, N. F., Jamieson, M. J., …Weatherill, K. J. (2021). THz electrometry with Rydberg atoms and all IR lasers. In 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). https://doi.org/10.1109/irmmw-thz50926.2021.9567392

Rydberg electromagnetically induced transparency (EIT) and Autler-Townes (AT) splitting in an atomic vapor cell can be used as novel methods for electric-magnetic field detection. Here we make use of 3 infrared lasers to realize a Rydberg EIT system... Read More about THz electrometry with Rydberg atoms and all IR lasers.

Full-Field Terahertz Imaging at Kilohertz Frame Rates Using Atomic Vapor (2020)
Journal Article
Downes, L. A., MacKellar, A. R., Whiting, D. J., Bourgenot, C., Adams, C. S., & Weatherill, K. J. (2020). Full-Field Terahertz Imaging at Kilohertz Frame Rates Using Atomic Vapor. Physical Review X, 10(1), Article 011027. https://doi.org/10.1103/physrevx.10.011027

There is much interest in employing terahertz (THz) radiation across a range of imaging applications, but so far, technologies have struggled to achieve the necessary frame rates. Here, we demonstrate a THz imaging system based upon efficient THz-to-... Read More about Full-Field Terahertz Imaging at Kilohertz Frame Rates Using Atomic Vapor.