We present a design for a switchable nanomagnetic atom mirror formed by an array of 180° domain walls confined within Ni80Fe20 planar nanowires. A simple analytical model is developed which allows the magnetic field produced by the domain wall array to be calculated. This model is then used to optimize the geometry of the nanowires so as to maximize the reflectivity of the atom mirror. We then describe the fabrication of a nanowire array and characterize its magnetic behavior using magneto-optic Kerr effect magnetometry, scanning Hall probe microscopy, and micromagnetic simulations, demonstrating how the mobility of the domain walls allow the atom mirror to be switched “on” and “off” in a manner which would be impossible for conventional designs. Finally, we model the reflection of R87b atoms from the atom mirror’s surface, showing that our design is well suited for investigating interactions between domain walls and cold atoms.We present a design for a switchable nanomagnetic atom mirror formed by an array of 180° domain walls confined within Ni80Fe20 planar nanowires. A simple analytical model is developed which allows the magnetic field produced by the domain wall array to be calculated. This model is then used to optimize the geometry of the nanowires so as to maximize the reflectivity of the atom mirror. We then describe the fabrication of a nanowire array and characterize its magnetic behavior using magneto-optic Kerr effect magnetometry, scanning Hall probe microscopy, and micromagnetic simulations, demonstrating how the mobility of the domain walls allow the atom mirror to be switched “on” and “off” in a manner which would be impossible for conventional designs. Finally, we model the reflection of R87b atoms from the atom mirror’s surface, showing that our design is well suited for investigating interactions between domain walls and cold atoms.

arXiv:1008.1769Journal of Applied PhysicsAug 15, 20106 citations

Atomic mirror

David F. P. Pile

Nature PhotonicsOct 31, 20160 citations

Electromagnetically Induced Transparency on a Single Artificial Atom

A. A. Abdumalikov, O. V. Astafiev, Alexandre M. Zagoskin +3 more

We present experimental observation of electromagnetically induced transparency (EIT) on a single macroscopic artificial "atom" (superconducting quantum system) coupled to open 1D space of a transmission line. Unlike in an optical media with many atoms, the single-atom EIT in 1D space is revealed in suppression of reflection of electromagnetic waves, rather than absorption. The observed almost 100% modulation of the reflection and transmission of propagating microwaves demonstrates full controllability of individual artificial atoms and a possibility to manipulate the atomic states. The system can be used as a switchable mirror of microwaves and opens a good perspective for its applications in photonic quantum information processing and other fields.We present experimental observation of electromagnetically induced transparency (EIT) on a single macroscopic artificial "atom" (superconducting quantum system) coupled to open 1D space of a transmission line. Unlike in an optical media with many atoms, the single-atom EIT in 1D space is revealed in suppression of reflection of electromagnetic waves, rather than absorption. The observed almost 100% modulation of the reflection and transmission of propagating microwaves demonstrates full controllability of individual artificial atoms and a possibility to manipulate the atomic states. The system can be used as a switchable mirror of microwaves and opens a good perspective for its applications in photonic quantum information processing and other fields.

arXiv:1004.2306Physical Review LettersMay 11, 2010347 citations

Microstructured Switchable Mirror for Polar Molecules

Stephan A. Schulz, Hendrick L. Bethlem, Jacqueline van Veldhoven +3 more

By miniaturizing electrode geometries high electric fields can be produced using modest voltages. A planar array of $20\text{ }\ensuremath{\mu}\mathrm{m}$ wide gold electrodes, spaced $20\text{ }\ensuremath{\mu}\mathrm{m}$ apart, is made on a sapphire substrate. A voltage difference of up to 350 V is applied to adjacent electrodes, generating an electric field that decreases exponentially with distance from the substrate. This microstructured array can be used as a mirror for polar molecules and can be rapidly switched on and off. This is demonstrated by retro\penalty1000\-\allowhyphens{}reflecting a beam of state-selected ammonia molecules with a forward velocity of about $30\text{ }\text{ }\mathrm{m}/\mathrm{s}$ .By miniaturizing electrode geometries high electric fields can be produced using modest voltages. A planar array of $20\text{ }\ensuremath{\mu}\mathrm{m}$ wide gold electrodes, spaced $20\text{ }\ensuremath{\mu}\mathrm{m}$ apart, is made on a sapphire substrate. A voltage difference of up to 350 V is applied to adjacent electrodes, generating an electric field that decreases exponentially with distance from the substrate. This microstructured array can be used as a mirror for polar molecules and can be rapidly switched on and off. This is demonstrated by retro\penalty1000\-\allowhyphens{}reflecting a beam of state-selected ammonia molecules with a forward velocity of about $30\text{ }\text{ }\mathrm{m}/\mathrm{s}$.

Physical Review LettersJul 9, 200443 citations

Tunable coupling in atom-mirror system

I.-C. Hoi, Lars Tornberg, Anton Frisk Kockum +4 more

Bulletin of the American Physical SocietyMar 3, 20141 citation

30\text{ }\text{ }\mathrm{m}/\mathrm{s}