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US 7,978,394 B1Granted
Magnetic spin based photonic/plasmonic devices
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsMark B Johnson, Abdulhakem Elezzabi, Kenneth J. Chau
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Abstract
A photonic/plasmonic device is disclosed that uses a ferroelectric material and its magnetization state in order to affect the physical properties of electromagnetic waves. The magnetization state of the ferromagnetic material may either be zero or nonzero. When the magnetization state of the ferromagnetic material is non-zero physical properties of the electromagnetic waves are altered. This effect can be used to make switches and the like.
Claims18
A photonic/plasmonic device comprising:
- a source of electromagnetic waves;
- a first layer comprising a ferromagnetic material having a magnetization state that is either substantially zero or non-zero with a spatial orientation;
- and wherein a property of an electromagnetic wave from the source of electromagnetic waves is altered by the magnetization state;
- a detector of electromagnetic waves;
- a second layer comprising a nonmagnetic material;
- and
- a first wave coupler which translates the electromagnetic wave into a surface plasmon wave.
4 more elements
An array of photonic/plasmonic devices comprising:
- a source of electromagnetic waves;
- a first photonic/plasmonic device comprising a first layer comprising a first ferromagnetic material having a magnetization state that is either substantially zero or non-zero with a spatial orientation;
- and wherein a property of an electromagnetic wave from the source of electromagnetic waves is altered by the magnetization state;
- a second photonic/plasmonic device comprising a second layer comprising a second ferromagnetic material having a second magnetization state that is either substantially zero or non-zero with a spatial orientation;
- wherein a property of an electromagnetic wave from the source of electromagnetic waves is altered by the second magnetization state, the second photonic/plasmonic device further comprising a third layer comprising a nonmagnetic material;
- a wave coupler which translates the electromagnetic wave into a surface plasmon wave;
- and
- a detector of electromagnetic waves.
5 more elements
Dependencies are inferred from the claim text.