AI Article Synopsis
- Scientists discovered a way to see a single Ce(3+) ion in a special crystal called YAG, and they looked at its magnetic and light properties.
- They found that they could control the energy state of this ion using a specific type of laser light.
- By watching how the ion glows after being excited, they were able to connect the ion's spin (a tiny magnetic property) with the light it emits, creating a link between the ion and a single particle of light (photon).
Article Abstract
We report on optical detection of a single photostable Ce(3+) ion in an yttrium aluminium garnet (YAG) crystal and on its magneto-optical properties at room temperature. The spin quantum state of the emitting level of a single cerium ion in YAG can be initialized by a circularly polarized laser pulse. Coherent precession of the electron spin is read out by observing temporal behavior of circularly polarized fluorescence of the ion. This implies direct mapping of the spin quantum state of Ce(3+) ion onto the polarization state of the emitted photon and represents the quantum interface between a single spin and a single photon.
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| http://dx.doi.org/10.1103/PhysRevLett.111.120502 | DOI Listing |
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