Modal refractive index measurement in nanowire lasers—a correlative approach

Patrick Parkinson, Juan Arturo Alanis, Kun Peng, Dhruv Saxena, Sudha Mokkapati, Nian Jiang, Lan Fu, Hark Hoe Tan, Chennupati Jagadish

Research output: Contribution to journalComment / DebateResearchpeer-review

5 Citations (Scopus)


We 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 ng = 4.7 ± 0.3.

Original languageEnglish
Article number035004
Number of pages6
JournalNano Futures
Issue number3
Publication statusPublished - 12 Jul 2018
Externally publishedYes


  • III
  • Multimodal characterisation
  • Nanolaser
  • V nanowire lasers

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