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  • 1
    Electronic Resource
    Electronic Resource
    Structured doping with light forces (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 1781-1783 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Light forces are a powerful tool for neutral atom manipulation and have been used previously to focus an atomic beam onto a substrate to create periodic nanostructures. We utilize the material-selective characteristic of the atom–light interaction to structure the material composition of a film during growth. A host and a dopant material are evaporated simultaneously, but only the dopant is focused by the light field. The dopant concentration varies laterally on a sub-100-nm-length scale. This technique can be extended to three-dimensional patterning and opens up ways to engineer the photonic, electronic, or magnetic features of a solid. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1355664
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  • 2
    Electronic Resource
    Electronic Resource
    A Heisenberg Microscope for Atoms (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 755 (1995), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1995.tb38964.x
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of the Wigner function of an ensemble of helium atoms (1997)
    [s.l.] : Nature Publishing Group
    Nature 386 (1997), S. 150-153 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Beams of atoms can exhibit interference and diffraction phenomena just like waves of light. For a coherent beam of helium atoms in a double-slit experiment, measurements of the quantum-mechanical analogue of the classical phase-space distribution function show that the motion of atoms behaves ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/386150a0
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  • 4
    Electronic Resource
    Electronic Resource
    Phase-coherent amplification of atomic matter waves (1999)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 402 (1999), S. 641-644 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Atomic matter waves, like electromagnetic waves, can be focused, reflected, guided and split by currently available passive atom-optical elements. However, the key for many applications of electromagnetic waves lies in the availability of amplifiers. These active devices allow small signals to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/45194
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  • 5
    Electronic Resource
    Electronic Resource
    Time-resolved detection of atoms diffracted from a standing light wave (1995)
    Springer
    Applied physics 60 (1995), S. 229-232 
    Details
    ISSN: 1432-0649
    Keywords: 03.75.B ; 03.75.D ; 42.50.V
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a time-resolved experimental observation of the diffraction of metastable helium atoms from a nearly resonant standing light wave. The application of a time-resolved detection technique and a pulsed source allows to resolve high diffraction orders, which are populated in the atom-light interaction. Furthermore, the rms momentum transfer from the light field on the atom as a function of the interaction time is investigated. Future applications of this technique may be the detailed investigation of the motion of atoms in standing light waves and the detection of correlations between spontaneously emitted photons and atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01135866
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  • 6
    Electronic Resource
    Electronic Resource
    A matter-wave interferometer based on the dc-Stark effect (1999)
    Springer
    Applied physics 69 (1999), S. 269-275 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 05.30.Jp; 32.80.Pj; 64.60.-i
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We present a new separated beam atom interferometer in which the recombination of the atomic wave packet is due to the dc-Stark interaction of an induced atomic dipole with a cylindrically symmetric electric field of a charged wire. The fringe period shows a weak power-law dependence on the de Broglie wavelength and the polarizability of the particles. We present a semiclassical theoretical model for this interferometer which resembles the measured performance of the interferometer without free parameters. A discussion of possible applications of this interferometer for atoms and molecules is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050807
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  • 7
    Electronic Resource
    Electronic Resource
    Nanolithography with metastabile helium (1996)
    Springer
    Applied physics 63 (1996), S. 203-205 
    Details
    ISSN: 1432-0649
    Keywords: 41.80.-y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have used a self-assembling monolayer of dodecanethiole molecules as the resist for a lithography technique based on a beam of metastable helium atoms. Doses as low as 3 metastable helium atoms per 10 molecules are enough to write patterns into this resist. An edge resolution of 30 nanometers is demonstrated. The writing mechanism is based on the damage of the resist due to Penning ionization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01095274
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  • 8
    Electronic Resource
    Electronic Resource
    Rapid communicationPattern generation with cesium atomic beams at nanometer scales (1996)
    Springer
    Applied physics 63 (1996), S. 649-652 
    Details
    ISSN: 1432-0649
    Keywords: PACS:07.77.Gx; 42.82.Cr
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We have demonstrated that a cesium atomic beam can be used to pattern a gold surface using a self assembling monolayer (SAM) as a resist. A 12.5 $\mu$ m period mesh was used as a proximity mask for the atomic beam. The cesium atoms locally change the wetability of the SAM, which allows a wet etching reagent to remove the underlying gold in the exposed regions. An edge resolution of better than 100 nm was obtained. The experiment suggests that this method can either be used as a sensitive position detector with nanometer resolution in atom optics, or for nanostructuring in a resist technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01831007
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  • 9
    Electronic Resource
    Electronic Resource
    Writing a superlattice with light forces (2000)
    Springer
    Applied physics 70 (2000), S. 671-674 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 32.80.Pj; 42.50.Vk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. In atom lithography the conventional roles played by light and matter are reversed. Instead of using a solid mask to pattern a light beam, a mask of light is used to pattern a beam of neutral atoms. In this paper we report the production of different chromium dot arrays with quadratic symmetry. The lattice period depends on the relative polarization and the phase of the two standing waves generating the light mask. A small angular misalignment of the laser beams breaks the high symmetry and a chromium superlattice is written, that is a continuous periodic change between two different quadratic lattices. The structures exhibit lines with a FWHM below 50 nm and clearly separated chromium dots with a FWHM below 70 nm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050879
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  • 10
    Electronic Resource
    Electronic Resource
    Imaging and focusing of an atomic beam with a large period standing light wave (1992)
    Springer
    Applied physics 54 (1992), S. 375-379 
    Details
    ISSN: 1432-0649
    Keywords: 32.80.−t ; 42.50.Vk ; 07.77.+P
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A novel atomic lens scheme is reported. A cylindrical lens potential was created by a large period (⋍ 45 μm) standing light wave perpendicular to a beam of metastable He atoms. The lens aperture (25 μm) was centered in one antinode of the standing wave; the laser frequency was nearly resonant with the atomic transition 23 S 1−23 P 2 (λ=1.083 μm) and the interaction time was significantly shorter than the spontaneous lifetime (100 ns) of the excited state. The thickness of the lens was given by the laser beam waist (40 μm) in the direction of the atomic beam. Preliminary results are presented, where an atomic beam is focused down to a spot size of 4 μm. Also, a microfabricated grating with a period of 8 μm was imaged. We discuss the principle limitations of the spatial resolution of the lens given by spherical and chromatic aberrations as well as by diffraction. The fact that this lens is very thin offers new perspectives for deep focusing into the nm range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325383
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