Laser cooling of Chromium atoms for nanofabrication

用于纳米加工的铬原子激光冷却

• 批准号: 13450030
• 负责人: INOUYE Yasushi
• 金额: $ 8.26万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450030/
• 关键词: atom optics; Jl Bessel beam; nanotechnology; laser cooling; scattering force; transition metal; photonic control patterning; gradient force; Zeeman slowing; 量子細線; 光の勾配力

We have established optical methods for controlling and manipulation of chromium atoms via radiation pressure, and have developed technology for fabrication of nanostructures using the methods. Especially, we achieved the methods using a laser diode which is suitable for industrial applications, and successfully fabricated one-dimensional periodic nanostructures (width : 150 nm, height : 6.7 nm, periodicity : 212.78 nm). This result was reported in SPIE's OE Magazine for its practicability. Furthermore, we developed elementary techniques, such as precise laser frequency control of which variation is less than 2 MHz. We also proposed guiding technology of atoms in light potential of J, Bessel beam which is formed by ring illumination optics or axicon prism. Deduced from numerical analysis of motion of atoms in the potential, atoms are well confined and guided in the beam. The numerical analysis also let us know the importance for reduction of broadening of atom velocity for fabricating finer structures. Then, we designed and developed a Zeeman slower which decelerates atoms efficiently.

我们已经建立了通过辐射压力控制和操纵铬原子的光学方法，并开发了使用这些方法制造纳米结构的技术。特别地，我们利用适合工业应用的激光二极管实现了这种方法，并成功地制作了一维周期纳米结构（宽：150 nm，高：6.7 nm，周期：212.78 nm）。这个结果在SPIE的OE杂志上报道了它的实用性。此外，我们还开发了一些基本的技术，如精确的激光频率控制，其变化小于2 MHz。提出了环形照明光学或轴突棱镜形成的J，贝塞尔光束光势的原子引导技术。从原子在势中的运动的数值分析推断，原子在束流中受到很好的约束和引导。数值分析也使我们认识到减小原子速度展宽对于制造精细结构的重要性。然后，我们设计并开发了一种塞曼减速机，可以有效地对原子进行减速。

项目成果

T.Masaki: "Near-field infrared imaging of molecular changes in cholesteryl oleate by free electron laser infrared ablation"J.Appl.Phys.. 95. 334-338 (2004)

T.Masaki：“通过自由电子激光红外烧蚀对胆固醇油酸酯分子变化进行近场红外成像”J.Appl.Phys.. 95. 334-338 (2004)

Y.Inouye: "7.3 Nano-patterning of metal structures based on atom optics"Nanotechnology Handbook Vol.I Fabrication (Nanotechnology Handbook Editorial Committee ed.) (Ohmsha, Tokyo). 255-262 (2003)

Y.Inouye：“7.3 基于原子光学的金属结构的纳米图案化”纳米技术手册第一卷制造（纳米技术手册编辑委员会编辑）（Ohmsha，东京）。

N.Hayazawa: "Near-field Raman imaging of organic molecules by an apertureless metallic probe scanning optical microscope"J.Chem.Phys.. 117. 1296-1301 (2002)

N.Hayazawa：“通过无孔金属探针扫描光学显微镜对有机分子进行近场拉曼成像”J.Chem.Phys.. 117. 1296-1301 (2002)

H.-B.Sun: "Laser-diode-tuned sequentially laser atom cooling and trapping for nanofabrications"Jpn.J.Appl.Phys.. 40. L711-L714 (2001)

H.-B.Sun：“用于纳米加工的激光二极管调谐顺序激光原子冷却和捕获”Jpn.J.Appl.Phys.. 40. L711-L714 (2001)

A.Tarun: "Apertureless optical near field fabrication using atomic force microscope on photoresists"Appl.Phys.Lett.. 80. 3400-3402 (2002)

A.Tarun：“使用原子力显微镜在光刻胶上进行无孔径光学近场制造”Appl.Phys.Lett.. 80. 3400-3402 (2002)