dorsal/arxiv
View SchemaNumerical simulations on the motion of atoms travelling through a standing-wave light field
| Authors | S. J. H. Petra, K. A. H. van Leeuwen, L. Feenstra, W. Hogervorst, W. Vassen |
|---|---|
| Categories | |
| ArXiv ID | physics/0306131 |
| URL | https://arxiv.org/abs/physics/0306131 |
| DOI | 10.1140/epjd/e2003-00229-y |
| Journal | Eur. Phys. J. D 27 (1), 83-91 (2003) |
Abstract
The motion of metastable helium atoms travelling through a standing light wave is investigated with a semi-classical numerical model. The results of a calculation including the velocity dependence of the dipole force are compared with those of the commonly used approach, which assumes a conservative dipole force. The comparison is made for two atom guiding regimes that can be used for the production of nanostructure arrays; a low power regime, where the atoms are focused in a standing wave by the dipole force, and a higher power regime, in which the atoms channel along the potential minima of the light field. In the low power regime the differences between the two models are negligible and both models show that, for lithography purposes, pattern widths of 150 nm can be achieved. In the high power channelling regime the conservative force model, predicting 100 nm features, is shown to break down. The model that incorporates velocity dependence, resulting in a structure size of 40 nm, remains valid, as demonstrated by a comparison with quantum Monte-Carlo wavefunction calculations.
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"abstract": "The motion of metastable helium atoms travelling through a standing light\nwave is investigated with a semi-classical numerical model. The results of a\ncalculation including the velocity dependence of the dipole force are compared\nwith those of the commonly used approach, which assumes a conservative dipole\nforce. The comparison is made for two atom guiding regimes that can be used for\nthe production of nanostructure arrays; a low power regime, where the atoms are\nfocused in a standing wave by the dipole force, and a higher power regime, in\nwhich the atoms channel along the potential minima of the light field. In the\nlow power regime the differences between the two models are negligible and both\nmodels show that, for lithography purposes, pattern widths of 150 nm can be\nachieved. In the high power channelling regime the conservative force model,\npredicting 100 nm features, is shown to break down. The model that incorporates\nvelocity dependence, resulting in a structure size of 40 nm, remains valid, as\ndemonstrated by a comparison with quantum Monte-Carlo wavefunction\ncalculations.",
"arxiv_id": "physics/0306131",
"authors": [
"S. J. H. Petra",
"K. A. H. van Leeuwen",
"L. Feenstra",
"W. Hogervorst",
"W. Vassen"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1140/epjd/e2003-00229-y",
"journal_ref": "Eur. Phys. J. D 27 (1), 83-91 (2003)",
"title": "Numerical simulations on the motion of atoms travelling through a standing-wave light field",
"url": "https://arxiv.org/abs/physics/0306131"
},
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