Simulation of Two-Dimensional Transverse Laser Cooling of Cesium Beam from Pyramidal Magneto-Optical Trap Atom Funnel

Abstract:

Simulation of two-dimensional (2D) transverse laser cooling of Cs atomic beam from pyramidal magneto-optical trap atom funnel (PMOTAF) conceived for atom lithography is presented. The results show that both the minimum full width at half maximum (FWHM) and the maximum peak value of the spatial profile of the atomic beam occur at the frequency detuning of optical molasses equals to -0.5 Г. Moreover, for each frequency detuning, an increase in the intensity of the optical molasses leads to smaller FWHM and higher peak value. The not negligible role of gravity on the atomic beam of sub-thermal longitudinal velocity along the horizontal direction is that every atomic trajectory possesses a parabolic motion either before or after laser cooling which leads to a noticeable displacement of the peak value at the observation plane with respect to the starting point.

• Periodical: Advanced Materials Research (Volumes 189-193)
• Pages: 3736-3739
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.189-193.3736
• Online since: February 2011
• Authors: Bao Wu Zhang, Nicolò Porfido, Francesco Tantussi, Francesco Fuso, Yan Ma, Wen Tao Zhang, Tong Bao Li
• Keywords: Atom Lithography, Atomic Beam, Laser Cooling

References

[1] G. Timp, R. E. Behringer, D. M. Tennant, and J. E. Cunningham, Phys. Rev. Lett., 69，1636 (1992).

[2] J. J. McClelland, R. E. Scholten, E. C. Palm, and R. J. Celotta, Science, 877, 262 (1993).

[3] J.J. McClelland, W.R. Anderson, C.C. Bradley, M. Walkiewicz, R.J. Celotta, E. Jurdík, and R.D. Deslattes, Res. Natl. Inst. Stand. Technol. 108, 99 (2003).

DOI: 10.6028/jres.108.0010

[4] Tongbao Li, SMT, 185, 8 (2005). (in chinese).

[5] Baowu Zhang, Yan Ma, Tongbao Li, Wentao Zhang, ACTA OPTICA SINICA, 29, 421 (2009). (in chinese).

DOI: 10.3788/aos20092902.0421

[6] Yan Ma, Baowu Zhang, Chunlan Zheng, Shanshan Ma, Fosheng Li, Zhanshan Wang, and Tongbao Li, Acta Phys. Sin., 56, 1365 (2007). (in chinese).

[7] Yunsheng Huo, Weiquan Cai, Qinglin Zeng, Heming Yan, Chinese Journal of Laser, 30, 22 (2003). (in chinese).

[8] Chunlan Zheng, Tongbao Li, Yan Ma, Shanshan Ma, Baowu Zhang, Acta. Phys. Sin., 55, 4528 (2006). (in chinese).

[9] W.R. Anderson, C.C. Bradley, J.J. McClelland, and R.J. Celotta, Phys. Rev. A 59, 2476 (1999).

[10] A. Camposeo, A. Piombini, F. Cervelli, F. Tantussi, F. Fuso, E. Arimondo, Opt. Comm. 200, 231 (2001).

DOI: 10.1016/s0030-4018(01)01643-1

[11] H.J. Metcalf and P. van der Straten, Laser Cooling and Trapping, (Springer-Verlag, New York，1999).