Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule (2023)
Journal Article
Guttridge, A., Ruttley, D., Baldock, A., González-Férez, R., Sadeghpour, H., Adams, C., & Cornish, S. (2023). Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule. Physical Review Letters, 131(1), Article 013401. https://doi.org/10.1103/PhysRevLett.131.013401

We demonstrate Rydberg blockade due to the charge-dipole interaction between a single Rb atom and a single RbCs molecule confined in optical tweezers. The molecule is formed by magnetoassociation of a Rb+Cs atom pair and subsequently transferred to t... Read More about Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule.

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.

Purcell-enhanced dipolar interactions in nanostructures (2022)
Journal Article
Skljarow, A., Kübler, H., Adams, C., Pfau, T., Löw, R., & Alaeian, H. (2022). Purcell-enhanced dipolar interactions in nanostructures. Physical Review Research, 4(2), https://doi.org/10.1103/physrevresearch.4.023073

Strong light-induced interactions between atoms are known to cause nonlinearities at a few-photon level, which are crucial for applications in quantum information processing. Compared to free space, the scattering and the light-induced dipolar intera... Read More about Purcell-enhanced dipolar interactions in nanostructures.

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.

Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell (2022)
Journal Article
Christaller, F., Mäusezahl, M., Moumtsilis, F., Belz, A., Kübler, H., Alaeian, H., …Pfau, T. (2022). Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell. Physical Review Letters, 128(17), Article 173401. https://doi.org/10.1103/physrevlett.128.173401

We exploit the effect of light-induced atomic desorption to produce high atomic densities (n ≫ k3) in a rubidium vapor cell. An intense off-resonant laser is pulsed for roughly one nanosecond on a micrometersized sapphire-coated cell, which results i... Read More about Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell.

High-resolution nanosecond spectroscopy of even-parity Rydberg excitons in Cu2O (2022)
Journal Article
Rogers, J. P., Gallagher, L. A., Pizzey, D., Pritchett, J. D., Adams, C. S., Jones, M. P., …Lynch, S. A. (2022). High-resolution nanosecond spectroscopy of even-parity Rydberg excitons in Cu2O. Physical Review B, 105(11), Article 115206. https://doi.org/10.1103/physrevb.105.115206

We present a study of even-parity Rydberg exciton states in cuprous oxide using second harmonic generation (SHG) spectroscopy. Excitonic states with principal quantum number n = 5 − 12 were excited by nanosecond pulses around 1143 nm. Using time-reso... Read More about High-resolution nanosecond spectroscopy of even-parity Rydberg excitons in Cu2O.

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.

THz electrometry with Rydberg atoms and all IR lasers (2021)
Conference Proceeding
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.

Rydberg excitons in synthetic cuprous oxide Cu2O (2021)
Journal Article
Lynch, S. A., Hodges, C., Mandal, S., Langbein, W., Singh, R. P., Gallagher, L. A., …Jones, M. P. (2021). Rydberg excitons in synthetic cuprous oxide Cu2O. Physical Review Materials, 5(8), Article 084602. https://doi.org/10.1103/physrevmaterials.5.084602

High-lying Rydberg states of Mott-Wannier excitons are receiving considerable interest due to the possibility of adding long-range interactions to the physics of excitons. Here, we study Rydberg excitation in bulk synthetic cuprous oxide grown by the... Read More about Rydberg excitons in synthetic cuprous oxide Cu2O.

Collectively encoded Rydberg qubit (2021)
Journal Article
Spong, N. L., Jiao, Y., Hughes, O. D., Weatherill, K. J., Lesanovsky, I., & Adams, C. S. (2021). Collectively encoded Rydberg qubit. Physical Review Letters, 127(6), Article 063604. https://doi.org/10.1103/physrevlett.127.063604

We demonstrate a collectively-encoded qubit based on a single Rydberg excitation stored in an ensemble of N entangled atoms. Qubit rotations are performed by applying microwave fields that drive excitations between Rydberg states. Coherent read-out i... Read More about Collectively encoded Rydberg qubit.

Collective effects in the photon statistics of thermal atomic ensembles (2021)
Journal Article
Ribeiro, S., Cutler, T. F., Adams, C. S., & Gardiner, S. A. (2021). Collective effects in the photon statistics of thermal atomic ensembles. Physical Review A, 104(1), Article 013719. https://doi.org/10.1103/physreva.104.013719

We investigate the collective scattering of coherent light from a thermal alkali-metal vapor with temperatures ranging from 350 to 450 K, corresponding to average atomic spacings between 0.7 λ and 0.1 λ. We develop a theoretical model treating the at... Read More about Collective effects in the photon statistics of thermal atomic ensembles.

Microwave-optical coupling via Rydberg excitons in cuprous oxide (2021)
Journal Article
Gallagher, L. A., Rogers, J. P., Pritchett, J. D., Mistry, R. A., Pizzey, D., Adams, C. S., …Lynch, S. A. (2022). Microwave-optical coupling via Rydberg excitons in cuprous oxide. Physical Review Research, 4(1), https://doi.org/10.1103/physrevresearch.4.013031

We report exciton-mediated coupling between microwave and optical fields in cuprous oxide (Cu2O) at low temperatures. Rydberg excitonic states with principal quantum number up to n = 12 were observed at 4 K using both one-photon (absorption) and two-... Read More about Microwave-optical coupling via Rydberg excitons in cuprous oxide.

Self-Induced Transparency in Warm and Strongly Interacting Rydberg Gases (2020)
Journal Article
Bai, Z., Adams, C. S., Huang, G., & Li, W. (2020). Self-Induced Transparency in Warm and Strongly Interacting Rydberg Gases. Physical Review Letters, 125(26), Article 263605. https://doi.org/10.1103/physrevlett.125.263605

We study dispersive optical nonlinearities of short pulses propagating in high number density, warm atomic vapors where the laser resonantly excites atoms to Rydberg P states via a single-photon transition. Three different regimes of the light-atom i... Read More about Self-Induced Transparency in Warm and Strongly Interacting Rydberg Gases.

The theoretical potential for large-scale underground thermal energy storage (UTES) within the UK (2020)
Journal Article
Gluyas, J., Adams, C., & Wilson, I. (2020). The theoretical potential for large-scale underground thermal energy storage (UTES) within the UK. Energy Reports, 6(7), 229-237. https://doi.org/10.1016/j.egyr.2020.12.006

Large scale storage of heat is critical for the successful decarbonisation of the UK’s energy mix and for grid-balancing. Heat generation currently accounts for 50% of all energy use in the UK and most of this is produced by burning fossil natural ga... Read More about The theoretical potential for large-scale underground thermal energy storage (UTES) within the UK.

Nanostructured alkali-metal vapor cells (2020)
Journal Article
Cutler, T., Hamlyn, W., Renger, J., Whittaker, K., Pizzey, D., Hughes, I., …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.

Phase Diagram and Self-Organizing Dynamics in a Thermal Ensemble of Strongly Interacting Rydberg Atoms (2020)
Journal Article
Ding, D., Busche, H., Shi, B., Guo, G., & Adams, C. S. (2020). Phase Diagram and Self-Organizing Dynamics in a Thermal Ensemble of Strongly Interacting Rydberg Atoms. Physical Review X, 10(2), Article 021023. https://doi.org/10.1103/physrevx.10.021023

Far-from-equilibrium dynamics that lead to self-organization are highly relevant to complex dynamical systems not only in physics but also in life, earth, and social sciences. However, it is challenging to find systems with sufficiently controllable... Read More about Phase Diagram and Self-Organizing Dynamics in a Thermal Ensemble of Strongly Interacting Rydberg Atoms.

Photon correlation transients in a weakly blockaded Rydberg ensemble (2020)
Journal Article
Möhl, C., Spong, N. L., Yuechun, J., So, C., Ilieva, T., Weidemüller, M., & Adams, C. S. (2020). Photon correlation transients in a weakly blockaded Rydberg ensemble. Journal of Physics B: Atomic, Molecular and Optical Physics, 53(8), Article 084005. https://doi.org/10.1088/1361-6455/ab728f

The nonlinear and non-local effects in atomic Rydberg media under electromagnetically induced transparency (EIT) make it a versatile platform for fundamental studies and applications in quantum information. In this paper, we study the dynamics of a R... Read More about Photon correlation transients in a weakly blockaded Rydberg ensemble.

Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer (2020)
Journal Article
Jackson, N., Hanley, R., Hill, M., Leroux, F., Adams, C., & Jones, M. (2020). Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer. SciPost Physics, 8(3), Article 038. https://doi.org/10.21468/scipostphys.8.3.038

We demonstrate number-resolved detection of individual strontium atoms in a long working distance low numerical aperture (NA = 0.26) tweezer. Using a camera based on single-photon counting technology, we determine the presence of an atom in the tweez... Read More about Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer.

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.

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.