Ultracold Gases & Nanophotonics
Laser Cooling and Related Techniques

Laser Cooling and Related Techniques

Modern measurement techniques and setups

None of our scientific results could have been possible without advanced experimental setups and modern measurement techniques. By implementing new solutions and concepts, we have significantly contributed to the technological development of ultracold physics and beyond. We have advanced state-of-the-art ultracold gas systems [1], and developed multi-frequencies laser injection techniques [2], original magnetic field compensation methods [3], and new pump-probe spectroscopic methods [4]. We also investigated laser cooling per se, showing the quantum nature of Doppler cooling on narrow transitions [5], and investigated cooling on electric quadrupole transitions [6].  

Figure: Advanced strontium setup (from ref. [1])

[1]     T. Yang, K. Pandey, M. S. Pramod, F. Leroux, C. C. Kwong, E. Hajiyev, Z. Y. Chia, B. Fang, D. Wilkowski, “A high flux source of cold strontium atoms,” Eur. Phys. J. D, vol. 69, no. 10, p. 226, Oct. 2015, doi: 10.1140/epjd/e2015-60288-y.

[2]      M. S. Pramod, T. Yang, K. Pandey, M. Giudici, and D. Wilkowski, “Selective injection locking of a multi-mode semiconductor laser to a multi-frequency reference beam,” Eur. Phys. J. D, vol. 68, no. 7, p. 186, Jul. 2014, doi: 10.1140/epjd/e2014-40732-4.

[3]      K. Pandey, C. C. Kwong, M. S. Pramod, and D. Wilkowski, “Linear and nonlinear magneto-optical rotation on the narrow strontium intercombination line,” Phys. Rev. A, vol. 93, no. 5, p. 053428, May 2016, doi: 10.1103/PhysRevA.93.053428.

[4]      E. A. Chan, S. A. Aljunid, N. I. Zheludev, D. Wilkowski, and M. Ducloy, “Doppler-free approach to optical pumping dynamics in the 6S_1/2−5D_5/2 electric quadrupole transition of cesium vapor,” Opt. Lett., vol. 41, no. 9, p. 2005, May 2016, doi: 10.1364/OL.41.002005.

[5]      M. Chalony, A. Kastberg, B. Klappauf, and D. Wilkowski, “Doppler Cooling to the Quantum Limit,” Phys. Rev. Lett., vol. 107, no. 24, p. 243002, Dec. 2011, doi: 10.1103/PhysRevLett.107.243002.

[6]      A. A. Kirpichnikova, O. N. Prudnikov, and D. Wilkowski, “Investigation of the possibility of ultra-deep laser cooling using a quadrupole transition,” Quantum Electron., vol. 49, no. 5, pp. 443–448, May 2019, doi: 10.1070/QEL16999.