Optically pumped electron spin filter

被引：29

作者：

Batelaan, H ^{[1
]}

Green, AS ^{[1
]}

Hitt, BA ^{[1
]}

Gay, TJ ^{[1
]}

机构：

[1] Univ Nebraska, Behlen Lab Phys, Lincoln, NE 68588 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.82.4216

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This paper reports the first experimental demonstration of an optically pumped electron spin filter. Unpolarized electrons produced in a cold-cathode discharge drift through a mixture of spin-polarized Rb and a nitrogen or helium buffer gas. Through spin-exchange collisions with the Rb, the drifting electrons become polarized along the optical pumping axis. We study the role of the buffer gas in both the optical pumping and the spin transfer to the free electrons. This spin filter produces electron beams with currents and polarizations comparable to first-generation GaAs polarized electron sources. [S0031-9007(99)09031-6].

引用

页码：4216 / 4219

页数：4

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