Parkinson, PatrickAlanis, Juan ArturoPeng, KunSaxena, DhruvMokkapati, SudhaJiang, NianFu, LanTan, Hark HoeJagadish, Chennupati2019-11-272399-1984http://hdl.handle.net/1885/186792We present a method to correlate multimodal measurements—namely optical spectroscopy and electron microscopy—over large ensembles of randomly distributed single nano-objects. Using an algorithmic approach derived from astrometry, a marker-free method of uniquely associating nano-objects characterised using multiple techniques is described. This approach is applied to nanolasers, enabling an experimental calculation of modal refractive index in sub-micron diameter nanowires. By matching the lasing spectrum and electron microscopy image of 13 nanowire lasers, the refractive index of the TE01 mode in GaAs/AlGaAs multiple-quantum well nanolasers is determined to be n g = 4.7 ± 0.3.PP acknowledges the support of the Royal Society (RG140411). LF, HHT and CJ acknowledge financial support from the Australian Research Council (ARC). JAA acknowledges support from a scholarship from CONACyT (Mexico).application/pdfen-AU© 2018 IOP Publishing Ltd2018-07-1210.1088/2399-1984/aad0c62020-07-05