Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 39: Posters: Quantum Optics and Photonics III
Q 39.3: Poster
Wednesday, March 11, 2020, 16:30–18:30, Empore Lichthof
Steady-state superradiance for active optical clocks — •Francesca Fama1, Sheng Zhou1, Shayne Bennetts1, Chun-Chia Chen1, Rodrigo Gonzalez-Escudero1, Benjamin Pasquiou1, Florian Schreck1, and the iqClock consortium2 — 1Institute of Physics, University of Amsterdam, Amsterdam, The Netherlands — 2www.iqclock.eu
Superradiant lasers have been proposed as a next generation optical atomic clock for precision measurement, metrology, quantum sensing and exploration of new physics [1]. Recently, a pulsed superradiant laser was demonstrated using the 87Sr clock transition [2], but a clock with millihertz stability requires steady-state operation.
We will describe the new machine that we are constructing, which aims to produce a steady-state superradiant laser for future time standards. The architecture is an improvement of our earlier work [3,4,5] where we have now demonstrated ideal sources for pumping a steady-state superradiant laser. We have produced a steady-state atomic beam guided by a dipole laser with a radial temperature of 1µK, a phase-space density of 10−4 and a flux of 3x107 88Sr/s. These performances have been explored also by using the 87Sr isotope, which is of particular interest for clocks.
[1] Meiser et al., PRL 102, 163601 (2009). [2] Norcia et al., Sci Adv 2, 10, e1601231 (2016). [3] Bennetts et al., PRL 119, 223202 (2017). [4] Chen et al., PRA, 100, 023401 (2019). [5] Chen et al., arXiv:1907.02793 (2019).