Modal refractive index measurement in nanowire lasers - a correlative approach

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

    Research output: Contribution to journalArticlepeer-review

    181 Downloads (Pure)


    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 n g = 4.7 ± 0.3.
    Original languageEnglish
    JournalNano Futures
    Early online date3 Jul 2018
    Publication statusPublished - 12 Jul 2018


    • III-V Nanowire lasers
    • Multimodal characterisation


    Dive into the research topics of 'Modal refractive index measurement in nanowire lasers - a correlative approach'. Together they form a unique fingerprint.

    Cite this