Ma Yan, Xiao Shengwei, Zhang Wanjing. Collimation of atomic beam for the fabrication of nano-scale length standards[J]. Infrared and Laser Engineering, 2014, 43(9): 2929-2934.
Citation:
|
Ma Yan, Xiao Shengwei, Zhang Wanjing. Collimation of atomic beam for the fabrication of nano-scale length standards[J]. Infrared and Laser Engineering, 2014, 43(9): 2929-2934.
|
Collimation of atomic beam for the fabrication of nano-scale length standards
- 1.
Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,Department of Physics,Tongji University,Shanghai 200092,China
- Received Date: 2014-01-05
- Rev Recd Date:
2014-02-06
- Publish Date:
2014-09-25
-
Abstract
To meet the requirement of Nano-scale dimensional metrology, length standards with features below 100 nanometers were indispensible instruments. The length standards with periodic length of 213 0.1 nm were successfully fabricated through atom lithography, which was connected to atomic transition frequency and thus retraceable to a constant measured with highly accuracy. For further improvement of the quality of these standards, the evaluation and optimization of collimating the atomic beam were described in this article. A knife-edge was settled to cut the atomic beam collimated by the laser Doppler cooling. The fluorescence of the beam was collected to calculate its angular distribution and equilibrium transverse temperature. The stimulated absorption rate was considered and discussed. Full angular width at half maximum as small as 0.544 mrad was observed, corresponding to temperature of 343.8 K. Several angular distributions were measured by changing the laser characteristics to optimize the collimation.
-
References
[1]
|
|
[2]
|
McClelland J J, Scholten R E, Palm E C, et al. Laser focusedatomic deposition[J]. Science, 1993, 262(5): 877-880. |
[3]
|
Ashkin A. Atomic-beam deflection by resonance-radiationpressure[J]. Phy Rev Lett, 1970 25(19): 1321-1324. |
[4]
|
|
[5]
|
Scholten R E, Gupta R, McClelland J J, et al, Lasercollimation of a chromium beam [J]. Phys Rev A, 1997, 55(2): 1331-1338. |
[6]
|
|
[7]
|
|
[8]
|
Wang Yiqiu. Atoms in Laser Cooling and Captive[M]. Beijing:Peking University Press, 2007: 71-87. (in Chinese) |
[9]
|
Ma Yan, Li Tongbao, Zhao Yajun, et al, Laser-FocusedAtomic Deposition for Nanoscale Grating[J]. Chin Phys Let,2011, 28(7): 0732020-073206. |
[10]
|
|
[11]
|
Ma Yan, Zhang Baowu, Zheng Cunlan, et al. Experimentalstudy of laser collimation of Cr beam [J]. Acta Phys Sin,2006, 55 (8): 4086-4090. |
[12]
|
|
[13]
|
|
[14]
|
Metcalf H J, Peter van der Straten. Laser cooling andtrapping of atoms[J]. J Opt Soc Am B, 2003, 20(5): 887-892. |
[15]
|
|
[16]
|
Zhang Baowu, Zhang Wentao, Ma Yan, et al. One-dimensionalDoppler laser collimation of chromium beam with a novelpre-collimating scheme [J]. Chin Opt Lett, 2008, 6 (10):782-784. |
[17]
|
Zhang Baowu, Li Tongbao, Zheng Cunlan, et al. Frequencystabilization for laser by LIF of 52Cr atomic beam [J].Optoelectronic Technology and Information, 2005, 18 (6):16-21. |
-
-
Proportional views
-