Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Weatherill, Kevin J."'
Autor:
Allinson, Gianluca, Jamieson, Matthew J., Downes, Lucy, Mackellar, Andrew R., Adams, C. Stuart, Weatherill, Kevin J.
Publikováno v:
Phys. Rev. Research 6, 023317 (2024)
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
Externí odkaz:
http://arxiv.org/abs/2311.11935
We demonstrate the rapid readout of terahertz (THz) orbital angular momentum (OAM) beams using an atomic-vapour based imaging technique. OAM modes with both azimuthal and radial indices are created using phase-only transmission plates. The beams unde
Externí odkaz:
http://arxiv.org/abs/2208.07273
Autor:
Spong, Nicholas L. R., Jiao, Yuechun, Hughes, Oliver D. W., Weatherill, Kevin J., Lesanovsky, Igor, Adams, Charles S.
Publikováno v:
Phys. Rev. Lett. 127, 063604 (2021)
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
Externí odkaz:
http://arxiv.org/abs/2010.11794
Autor:
Jiao, Yuechun, Spong, Nicholas L. R., Hughes, Oliver D. W., So, Chloe, Ilieva, Teodora, Weatherill, Kevin J., Adams, Charles S.
We demonstrate a single-photon stored-light interferometer, where a photon is stored in a laser-cooled atomic ensemble in the form of a Rydberg polariton with a spatial extent of $10 \times1\times1\mu m^3$. The photon is subject to a Ramsey sequence,
Externí odkaz:
http://arxiv.org/abs/2008.04675
Autor:
Downes, Lucy A., MacKellar, Andrew R., Whiting, Daniel J., Bourgenot, Cyril, Adams, Charles S., Weatherill, Kevin J.
Publikováno v:
Phys. Rev. X 10, 011027 (2020)
Terahertz (THz) technologies, generally defined as operating in the 0.1-10THz range, bridge the gap between electronic and photonic devices. Because THz radiation passes readily through materials such as plastics, paper and cloth it can be employed i
Externí odkaz:
http://arxiv.org/abs/1903.01308
Autor:
Wade, Christopher G., Marcuzzi, Matteo, Levi, Emanuele, Kondo, Jorge M., Lesanovsky, Igor, Adams, Charles S., Weatherill, Kevin J.
There are few demonstrated examples of phase transitions that may be driven directly by terahertz-frequency electric fields, and those that are known require field strengths exceeding 1 MVcm$^{-1}$. Here we report a room-temperature phase transition
Externí odkaz:
http://arxiv.org/abs/1709.00262
Autor:
Hanley, Ryan K., Bounds, Alistair D., Huillery, Paul, Keegan, Niamh C., Faoro, Riccardo, Bridge, Elizabeth M., Weatherill, Kevin J., Jones, Matthew P. A.
We demonstrate a method for probing interaction effects in a thermal beam of strontium atoms using simultaneous measurements of Rydberg EIT and spontaneously created ions or electrons. We present a Doppler-averaged optical Bloch equation model that r
Externí odkaz:
http://arxiv.org/abs/1702.05039
Dressed-state electromagnetically induced transparency for light storage in uniform phase spin-waves
Publikováno v:
Phys. Rev. A 94, 033840 (2016)
We present, experimentally and theoretically, a scheme for dressed-state electromagnetically induced transparency (EIT) in a three-step cascade system where a four-level system is mapped into an effective three-level system. Theoretical analysis reve
Externí odkaz:
http://arxiv.org/abs/1607.08031
Autor:
Wade, Christopher G., Šibalić, Nikola, de Melo, Natalia R., Kondo, Jorge M., Adams, Charles S., Weatherill, Kevin J.
Terahertz (THz) near-field imaging is a flourishing discipline [1], with applications from fundamental studies of beam propagation [2,3] to the characterisation of metameterials [4,5] and waveguides [6,7]. Beating the diffraction limit typically invo
Externí odkaz:
http://arxiv.org/abs/1603.07107
Autor:
de Melo, Natalia R., Wade, Christopher G., Sibalic, Nikola, Kondo, Jorge M., Adams, Charles S., Weatherill, Kevin J.
Publikováno v:
Phys. Rev. A 93, 063863 (2016)
We observe and characterize intrinsic optical bistability in a dilute Rydberg vapor. The bistability is characterized by sharp jumps between states of low and high Rydberg occupancy with jump up and down positions displaying hysteresis depending on t
Externí odkaz:
http://arxiv.org/abs/1603.01449