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. 2017 Aug 25;6(8):e17030. doi: 10.1038/lsa.2017.30

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Copyright © 2017 The Author(s)

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/

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Experimental setup. At the top left corner is a cryostat containing a sample that is pumped by a titanium:sapphire laser. The steady-state, continuous wave (cw) pumped photoluminescence is analyzed using a grating spectrometer connected to a CCD, a scanning Fabry-Pérot interferometer, a HBT setup with SPCMs and a TCSPC module. The cold mirror superimposes the pump laser onto the detection path, the pinhole provides spatial filtering, and the 850 nm longpass filter blocks scattered pump laser light. CCD, charge-coupled device; TCSPC, time-correlated single-photon counting.