We have just submitted a new white paper to the ESA Voyage 2050 call on how to test the equivalence principle on a satellite in space.
(PDF-version of the white paper in here)
Nature 570 205–209 (2019)
S. Pandey, H. Mas, G. Drougakis, P. Thekkeppatt, V. Bolpasi, G. Vasilakis, K. Poulios, and W. von Klitzing
Our paper on “Simple precision measurements of optical beam sizes” in now in the TOP 10 most downloaded paper of Applied Optics for two months in a row:
We have two new fully funded PhD positions available!
For more information please contact Wolf von Klitzing
Applied Optics 57 9863 (2018)
Abstract: We present a simple high-precision method to quickly and accurately measure the diameters of Gaussian beams, Airy spots, and central peaks of Bessel beams ranging from sub-millimeter to many centimeters without special- ized equipment. By simply moving a wire through the beam and recording the relative losses using an optical power meter, one can easily measure the beam diameters with a precision of 1%. The accuracy of this method has been experimentally verified for Gaussian beams down to the limit of a commercial slit-based beam profiler (3%).
Our paper on “Simple precision measurements of optical beam sizes” has been the seventh most downloaded paper of Applied Optics in November 2018.
Congratulations to Jules Grucker, he just passed his Thèse d’État, which is the highest degree available in France.
AIP Advances 8 095020 (2018)
We present a slave laser highly suitable for the preparation and detection of 87Rb Bose-Einstein condensates (BEC). A highly anti-reflection coated laser diode serves as an optical amplifier, which requires neither active temperature stabilization nor dedicated equipment monitoring the spectral purity of the amplified light. The laser power can be controlled with a precision of 10μW in 70mW with relative fluctuations down to 2 × 10^−4. Due to its simplicity and reliability, this slave laser will be a useful tool for laboratory, mobile, or even space-based cold-atom experiments. By the way of demonstration this slave laser was used as the sole 780nm light-source in the production of 3×10^4 BECs in a hybrid magnetic/dipole trap.
Alexandra Roussou has given a very interesting talk on the Excitation Spectrum Of A Mixture Of Two Bose Gases Confined In A Ring Potential With Interaction Asymmetry.