Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.146804
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Funding
- GCOE for Physical Sciences Frontier, MEXT, Japan [19104007, 21244046]
- Special Coordination Funds for Promoting Science and Technology
- MEXT
- Innovative area [21102993]
- FIRST program
- QuEST [HR-001-09-1-0007]
- QPEC
- University of Tokyo
- Grants-in-Aid for Scientific Research [11J09145, 21244046, 19104007] Funding Source: KAKEN
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We demonstrate single-shot detection of single electrons generated by single photons using an electrically tunable quantum dot and a quantum point contact charge detector. By tuning the quantum dot in a Coulomb blockade before the photoexcitation, we observe the trapping and subsequent resetting of single photogenerated electrons. The photogenerated electrons can be stored in the dot for a tunable time range from shorter to longer than the spin-flip time T-1. We combine this trap-reset technique with spin-dependent tunneling under magnetic fields to observe the spin-dependent photon detection within the T-1.
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