Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot

Details Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot

2010-10-16

arxiv.org/abs/1010.3330v2

Phys. Rev. Lett. 106, 046802 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages main article + 7 pages supplement, 4 + 2 figures

Scientific paper

10.1103/PhysRevLett.106.046802

We present a technique for manipulating the nuclear spins and the emission polarization from a single optically active quantum dot. When the quantum dot is tunnel coupled to a Fermi sea, we have discovered a natural cycle in which an electron spin is repeatedly created with resonant optical excitation. The spontaneous emission polarization and the nuclear spin polarization exhibit a bistability. For a sigma(+) pump, the emission switches from sigma(+) to sigma(-) at a particular detuning of the laser. Simultaneously, the nuclear spin polarization switches from positive to negative. Away from the bistability, the nuclear spin polarization can be changed continuously from negative to positive, allowing precise control via the laser wavelength.

Affiliated with

Also associated with

No associations

Rating

Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-181823