亚波长局域化物质波的相干斑图
Coherent Patterning of Matter Waves with Subwavelength Localization
摘要：
我们提出了亚波长绝热局域化技术（Subwavelength Localization via Adiabatic Passage，简称SBG）来相干地实现远超过衍射极限的物质波的态选择性图案化。该技术包括在耦合两个部分重叠和空间结构的激光场的三个内部水平的物质波产生状态选择性本地化在那些位置的绝热通过过程不会发生。我们表明，通过这种技术的物质波本地化下降到单纳米尺度可以实现。我们详细分析了潜在的实施与亚稳态Ne* 的原子束的纳米光刻和相干图案的两个组件87 Rb玻色-爱因斯坦凝聚体的SCREEN技术。
英文摘要：
We propose the Subwavelength Localization via Adiabatic Passage (SLAP) technique to coherently achieve state-selective patterning of matter waves well beyond the diffraction limit. The SLAP technique consists in coupling two partially overlapping and spatially structured laser fields to three internal levels of the matter wave yielding state-selective localization at those positions where the adiabatic passage process does not occur. We show that by means of this technique matter wave localization down to the single nanometer scale can be achieved. We analyze in detail the potential implementation of the SLAP technique for nano-lithography with an atomic beam of metastable Ne* and for coherent patterning of a two-component 87Rb Bose-Einstein condensate.
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