Two-step photoionization of cold atoms by two-color evanescent-light waves and application to atom detection with high spatial resolution

被引：2

作者：

Yamamoto, Kazuhiro ^{[1
]}

Ito, Haruhiko ^{[1
]}

Totsuka, Kouki ^{[1
]}

Sato, Tomohiro ^{[1
]}

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan

来源：

OPTICS COMMUNICATIONS | 2006年 / 265卷 / 02期

关键词：

two-step photoionization; evanescent light; near-field light; ionization cross section; high spatial resolution atom detection; cold atoms; OPTICAL NEAR-FIELD;

D O I：

10.1016/j.optcom.2006.04.012

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We consider a new scheme of optically ionizing atoms with 10-nm-order spatial resolution. In this method, two-color near-field lights are generated on a narrow slit illuminated by two-color evanescent lights via total-internal reflection of two-wavelength light beams. In order to illustrate the feasibility, we first obtain the ionization cross section from two-step photionization of cold Rb atoms by two-color evanescent lights on a plane surface of a prism. Then, we numerically estimate the ionization efficiency as a function of the slit width using Bethe formula. The scheme is useful for detecting ground-state atoms under less perturbation by scattered light. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：692 / 695

页数：4

共 25 条

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