Observation of a large, resonant, cross-Kerr nonlinearity in a cold Rydberg gas
We report the experimental observation of a cross-Kerr nonlinearity in a free-space medium based on resonantly excited, interacting Rydberg atoms and electromagnetically induced transparency. The nonlinearity is used to implement cross-phase modulation between two optical pulses. The nonlinear phase...
| Prif Awduron: | , , , , |
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| Fformat: | Erthygl |
| Iaith: | English |
| Cyhoeddwyd: |
American Physical Society
2019-12-01
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| Cyfres: | Physical Review Research |
| Mynediad Ar-lein: | http://doi.org/10.1103/PhysRevResearch.1.033193 |
| Crynodeb: | We report the experimental observation of a cross-Kerr nonlinearity in a free-space medium based on resonantly excited, interacting Rydberg atoms and electromagnetically induced transparency. The nonlinearity is used to implement cross-phase modulation between two optical pulses. The nonlinear phase written onto the probe pulse is measured to be as large as 8 mrad per nanowatt of signal power, corresponding to a χ^{(3)} of 10^{−8}m^{2}/V^{2}. Potential applications range from optical quantum information processing to quantum nondemolition measurement of photon number. |
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| ISSN: | 2643-1564 |