Exciton Lasing in ZnO-ZnCr2O4 Nanowalls

Tejendra Dixit, Jitesh Agrawal, Miryala Muralidhar, Masato Murakami, Kolla Lakshmi Ganapathi, Vipul Singh, M. S.Ramachandra Rao

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We demonstrate low power continuous wave, red and NIR exciton lasing with FWHM of 1 nm, quality factor of 680 and threshold power of 100 μW in ZnO-ZnCr2O4 nanowalls. The NIR lasing was enabled by integrating ZnO with ZnCr2O4. Moreover, wavelength selective photoluminescence (tuning from UV to NIR) and enhanced two-photon emission were also observed in ZnO-ZnCr2O4 nanowalls. The exciton-exciton scattering can be attributed to the observation of exciton lasing at low temperature (<200 K). A plausible mechanism has been elucidated in order to explain the results. This work will open new opportunities in the advancement of oxide semiconductors based exciton lasers.

Original languageEnglish
Article number8854157
JournalIEEE Photonics Journal
Issue number6
Publication statusPublished - 2019 Dec


  • Photoluminescence spectroscopy
  • direct band transition
  • exciton-plasmon coupling
  • multi-layer MoS

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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