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Proceedings Paper

Quantum simulation of laser cooling for fabrication of nanometer scale pitch standard
Author(s): Yi-Li Xiao; Yan Ma; Wen Wu; Wei-Gang Gong; Tong-Bao Li
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Paper Abstract

A quantum mechanical Monte Carlo simulation is carried out for one-dimensional laser cooling of Chromium atoms. Chromium atom beam collimation via transverse laser cooling is essential for the fabrication of periodic nanometer scale structures by laser-focused atomic deposition. Such structures can be used as precision pitch standards for nanometer scale measurement and engineering. We explore the roles played by several factors, such as laser intensity and detuning, in the cooling process. Calculation results show different dependencies for cooling rate and ultimate temperature to be reached with given sets of parameters. Also, for atoms with different initial velocities in the transverse direction, the conditions under which optimal collimation effect is achieved can differ. Consequently, the current experimental setup, which utilizes LIF spots from marginal beams to monitor the laser collimation, can produce cooling effects which are not optimal for the end product.

Paper Details

Date Published: 28 December 2010
PDF: 6 pages
Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754467 (28 December 2010); doi: 10.1117/12.886447
Show Author Affiliations
Yi-Li Xiao, Tongji Univ. (China)
Yan Ma, Tongji Univ. (China)
Wen Wu, Tongji Univ. (China)
Wei-Gang Gong, Tongji Univ. (China)
Tong-Bao Li, Tongji Univ. (China)

Published in SPIE Proceedings Vol. 7544:
Sixth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Xianfang Wen, Editor(s)

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