Hannover 2003 – scientific programme
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Q: Quantenoptik
Q 3: Laserspektroskopie 1
Q 3.5: Talk
Monday, March 24, 2003, 12:00–12:15, F107
Coherence of photons from a single quantum system — •A. Volkmer1, F. Jelezko1, I. Popa1, K.K. Rebane2, and J. Wrachtrup1 — 13rd Institute of Physics, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — 2Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia
We present a novel methodology that allows recording the wave-like properties of emitted photons, such as its phase and coherence time, from a single quantum system in solid. The feasibility of this approach is experimentally demonstrated by measuring the self-interference of photons from the zero-phonon line emission of a single nitrogen-vacancy defect in diamond at 1.6 K. The first-order correlation function has been recorded and analyzed in terms of a single exponential decay time. A coherence time of 5 ps has been obtained, which is in good agreement with the corresponding spectral line width.