Journal
PHYSICAL REVIEW LETTERS
Volume 118, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.233602
Keywords
-
Categories
Funding
- Danish Council for Independent Research [DFF-4181-00416]
- Villum Funden via the NATEC Centre [8692]
- European Union's Horizon research and innovation programme under the Marie Sklodowska-Curie Grant [703193]
- French Agence Nationale de la Recherche [ANR-11-BS10-010]
- CNano Ile-de-France [11017728]
- Villum Fonden [00008692] Funding Source: researchfish
Ask authors/readers for more resources
We investigate the temperature dependence of photon coherence properties through two-photon interference (TPI) measurements from a single quantum dot (QD) under resonant excitation. We show that the loss of indistinguishability is related only to the electron-phonon coupling and is not affected by spectral diffusion. Through these measurements and a complementary microscopic theory, we identify two independent separate decoherence processes, both of which are associated with phonons. Below 10 K, we find that the relaxation of the vibrational lattice is the dominant contribution to the loss of TPI visibility. This process is non-Markovian in nature and corresponds to real phonon transitions resulting in a broad phonon sideband in the QD emission spectra. Above 10 K, virtual phonon transitions to higher lying excited states in the QD become the dominant dephasing mechanism, this leads to a broadening of the zero phonon line, and a corresponding rapid decay in the visibility. The microscopic theory we develop provides analytic expressions for the dephasing rates for both virtual phonon scattering and non-Markovian lattice relaxation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available