Parallel Recording of Single Quantum Dot Optical Emission Using Multicore Fibers

G. Muñoz-Matutano, D. Barrera, C. R. Fernández-Pousa, R. Chulia-Jordan, J. Martínez-Pastor, I. Gasulla, L. Seravalli, G. Trevisi, P. Frigeri, S. Sales

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Single indium arsenide quantum dot emission spectra have been recorded using a four-core, crosstalk-free, multicore fiber placed at the collection arm of a confocal microscope. We developed two different measurement setups depending on the relative configuration of the excitation and collection spots. In the single-matched mode, the emission from the excited area is collected by a single core in the multicore fiber, whereas the three remaining cores capture the emission from neighboring, non-excited areas. This procedure allows for the recording of the quantum dot emission from carrier diffusion between sample positions separated by more than 6 μm. In the multiple-matched mode, the excitation spot overlaps the four-core emission area. This configuration permits the acquisition of the micro-photoluminescence spectra at different sample positions without scanning. These results show the possibilities offered by multicore fibers for the spectroscopic analysis of single semiconductor quantum dot optical emission.

Original languageEnglish
Article number7426355
Pages (from-to)1257-1260
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number11
Publication statusPublished - 1 Jun 2016
Externally publishedYes


  • Multicore fibers
  • Single Quantum Dot
  • Spectroscopy


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