Abstract
Full text: High quality atomic mirrors and beam splitters that permit the manipulation of slowly moving atoms are needed in atom optics. We have an established programme of developing and testing mirrors for atom optics based on the interaction between the magnetic dipole moment of an atom and the exponentially varying magnetic field above a periodic array of magnetic elements. Previously we have observed strong reflection of cold atoms from mirrors based on several different approaches. For good specularity from a 'hard' magnetic surface, and so that the magnetic structures can be used as diffractive beam splitters, it is necessary that they have periodicities on a micron scale. We have recently produced very promising high quality, micron-period mirrors based on grooved, perpendicularly magnetised Co{sub 0} gCr{sub 02} structures. Structures with periods ranging from O 7 to 4 {mu}m have been fabricated using electron beam lithography and replication techniques, and characterised with magnetic force microscopy. Laser-cooled Cs and Rb atoms have been reflected from structures of area 10x10 mm{sup 2}. Time-of-flight observations of optically-pumped atoms show that the mirrors are highly reflecting, and analysis of the spatial profiles of the falling and bouncing atom clouds indicate that the angular spread resulting
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McLean, R J;
Sidorov, A L;
Gough, D S;
Scharnberg, F;
Hannaford, P;
[1]
Sexton, B A;
Davis, T J;
[2]
Akulshin, A M;
Opat, G I
[3]
- Swinburne Universisty of Technology, VIC (Australia). School of Biophysical Sciences and Electrical Engineering
- Commonwealth Scientific and Industrial Research Organisation, Clayton, VIC (Australia). Manufacturing Science and Technology
- University of Melbourne, VIC (Australia). School of Physics
Citation Formats
McLean, R J, Sidorov, A L, Gough, D S, Scharnberg, F, Hannaford, P, Sexton, B A, Davis, T J, Akulshin, A M, and Opat, G I.
Reflection of laser-cooled atoms from high quality, micron-period, grooved magnetic mirrors.
Australia: N. p.,
2002.
Web.
McLean, R J, Sidorov, A L, Gough, D S, Scharnberg, F, Hannaford, P, Sexton, B A, Davis, T J, Akulshin, A M, & Opat, G I.
Reflection of laser-cooled atoms from high quality, micron-period, grooved magnetic mirrors.
Australia.
McLean, R J, Sidorov, A L, Gough, D S, Scharnberg, F, Hannaford, P, Sexton, B A, Davis, T J, Akulshin, A M, and Opat, G I.
2002.
"Reflection of laser-cooled atoms from high quality, micron-period, grooved magnetic mirrors."
Australia.
@misc{etde_20619803,
title = {Reflection of laser-cooled atoms from high quality, micron-period, grooved magnetic mirrors}
author = {McLean, R J, Sidorov, A L, Gough, D S, Scharnberg, F, Hannaford, P, Sexton, B A, Davis, T J, Akulshin, A M, and Opat, G I}
abstractNote = {Full text: High quality atomic mirrors and beam splitters that permit the manipulation of slowly moving atoms are needed in atom optics. We have an established programme of developing and testing mirrors for atom optics based on the interaction between the magnetic dipole moment of an atom and the exponentially varying magnetic field above a periodic array of magnetic elements. Previously we have observed strong reflection of cold atoms from mirrors based on several different approaches. For good specularity from a 'hard' magnetic surface, and so that the magnetic structures can be used as diffractive beam splitters, it is necessary that they have periodicities on a micron scale. We have recently produced very promising high quality, micron-period mirrors based on grooved, perpendicularly magnetised Co{sub 0} gCr{sub 02} structures. Structures with periods ranging from O 7 to 4 {mu}m have been fabricated using electron beam lithography and replication techniques, and characterised with magnetic force microscopy. Laser-cooled Cs and Rb atoms have been reflected from structures of area 10x10 mm{sup 2}. Time-of-flight observations of optically-pumped atoms show that the mirrors are highly reflecting, and analysis of the spatial profiles of the falling and bouncing atom clouds indicate that the angular spread resulting from the reflection process is consistent with good specularity. This type of magnetic structure appears to be the most promising to date for producing high-quality magnetic mirrors with micron periodicity. Their quality could be improved further by using magneto-optical materials, which offer superior magnetic characteristics.}
place = {Australia}
year = {2002}
month = {Jul}
}
title = {Reflection of laser-cooled atoms from high quality, micron-period, grooved magnetic mirrors}
author = {McLean, R J, Sidorov, A L, Gough, D S, Scharnberg, F, Hannaford, P, Sexton, B A, Davis, T J, Akulshin, A M, and Opat, G I}
abstractNote = {Full text: High quality atomic mirrors and beam splitters that permit the manipulation of slowly moving atoms are needed in atom optics. We have an established programme of developing and testing mirrors for atom optics based on the interaction between the magnetic dipole moment of an atom and the exponentially varying magnetic field above a periodic array of magnetic elements. Previously we have observed strong reflection of cold atoms from mirrors based on several different approaches. For good specularity from a 'hard' magnetic surface, and so that the magnetic structures can be used as diffractive beam splitters, it is necessary that they have periodicities on a micron scale. We have recently produced very promising high quality, micron-period mirrors based on grooved, perpendicularly magnetised Co{sub 0} gCr{sub 02} structures. Structures with periods ranging from O 7 to 4 {mu}m have been fabricated using electron beam lithography and replication techniques, and characterised with magnetic force microscopy. Laser-cooled Cs and Rb atoms have been reflected from structures of area 10x10 mm{sup 2}. Time-of-flight observations of optically-pumped atoms show that the mirrors are highly reflecting, and analysis of the spatial profiles of the falling and bouncing atom clouds indicate that the angular spread resulting from the reflection process is consistent with good specularity. This type of magnetic structure appears to be the most promising to date for producing high-quality magnetic mirrors with micron periodicity. Their quality could be improved further by using magneto-optical materials, which offer superior magnetic characteristics.}
place = {Australia}
year = {2002}
month = {Jul}
}