Coherent coupling dynamics in a quantum-dot microdisk laser
Abstract
Luminescence intensity autocorrelation (LIA) is employed to investigate coupling dynamics between (In, Ga)As quantum dots (QD's) and a high-Q (~7000) resonator with ultrafast time resolution (150 fs), below and above the lasing threshold at T=5 K. For QD's resonant and nonresonant with the cavity we observe both a sixfold enhancement and a 0.77-time reduction of the spontaneous emission rate, respectively. In addition, LIA spectroscopy reveals the onset of coherent coupling at the lasing threshold through qualitative changes in the dynamic behavior and a tripling of the resonant QD emission rate.
- Publication:
-
Physical Review B
- Pub Date:
- August 2002
- DOI:
- 10.1103/PhysRevB.66.081307
- arXiv:
- arXiv:cond-mat/0206065
- Bibcode:
- 2002PhRvB..66h1307Y
- Keywords:
-
- 03.67.Lx;
- 42.55.Sa;
- 78.47.+p;
- 78.67.-n;
- Quantum computation;
- Microcavity and microdisk lasers;
- Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter;
- Optical properties of low-dimensional mesoscopic and nanoscale materials and structures;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Materials Science
- E-Print:
- Accepted for publication, Phys. Rev. B Rapid Communications, 11 pages, 4 figures