2008/08/07 by Bruno Gayral, B. Gayral, Jean‐Michel Gérard +1 · 1 citation
Engineering · Physics and Astronomy · #Condensed matter physics #Excitation #Laser #Laser linewidth #Materials science #Optical microcavity #Optics #Optoelectronics #Photoluminescence #Photoluminescence excitation #Photonic Crystals and Applications #Photonic and Optical Devices #Physics #Purcell effect #Q factor #Quality (philosophy) #Quantum dot #Quantum mechanics #Resonator #Spontaneous emission #Strong Light-Matter Interactions #quant-ph
paper · pdf · doi:10.1103/physrevb.78.235306
15 pages, 5 figures
arxiv created 2008/08/07 · openalex publication_date 2008/12/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
It is usually assumed that when performing a photoluminescence experiment on a microcavity containing an inhomogeneously broadened quantum dot ensemble, the cavity mode appears as a positive peak with a linewidth that reflects the mode quality factor Q. We show in this paper that this conclusion is in general not true and that the measured mode linewidth depends strongly on the excitation power for microcavities having large Purcell factors. We analyze theoretically this effect in the case of the micropillar cavity, and we show that the same microcavity can give rise to a large variety of photoluminescence spectral signatures depending on the excitation power and collection setup. We finally give guidelines to measure the real cavity quality factor by photoluminescence.