Direct single-shot observation of millimeter-wave superradiance in Rydberg-Rydberg transitions

作者：Grimes, David D.; Coy, Stephen L.; Barnum, Timothy J.; Zhou, Yan; Yelin, Susanne F.; Field, Robert W.^*

来源：Physical Review A, 2017, 95(4): 043818.

DOI：10.1103/PhysRevA.95.043818

• SUPER-RADIANCE
• ATOM MASERS
• SYSTEMS
• GAS
• RADIATION
• EMISSION
• PHOTON
• BEAM

We have directly detected millimeter-wave (mm-wave) free-space superradiant emission from Rydberg states (principal quantum number n similar to 30) of barium atoms in single-shot experiments. We trigger the cooperative effects with a weak initial pulse and detect the time-dependent amplitude and phase of the emitted radiation with single-shot sensitivity and 20 ps time resolution. This allows measurement and shot-by-shot analysis of the statistical distribution of decay rates, time delays, and time-dependent frequency shifts. Cooperative line shifts and decay rates are observed that exceed the 250 kHz Doppler width by a factor of 20 and the 50 Hz spontaneous emission rate by a factor of 10(5).

• 出版日期2017-4-12