2010/09/03 by Jean-Sebastian Tempel, Tempel, Jean-Sebastian, Ilya A. Akimov +23
Engineering · Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Semiconductor Lasers and Optical Devices #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1009.0731
12 pages, 5 figures
arxiv created 2010/09/03 · openalex publication_date 2010/09/03 · arxiv updated 2010/09/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present investigations on the coherence of the emission from the polarization split fundamental mode of an AlGaInAs/GaAs quantum-dot microcavity laser. Using polarization insensitive measurements of the first-order field-correlation function g(1)(τ) we determine the power-dependent degree of polarization. Whereas the orthogonally-polarized components of the fundamental mode exhibit comparable strength below the lasing threshold, a degree of linear polarization of 0.99 is observed in the coherent regime. This is also observed for increasing temperatures up to 77K. Furthermore, by measuring g(1)(τ) for both modes separately the stronger mode is found to reveal a record coherence time of 20ns. Finally, based on a theoretical model it is possible to fully characterize the cavity emission in terms of first- and second-order coherence using auxiliary data from g(2)(τ) measurements performed with a recently developed streak camera technique.