Graphene Quantum Dot Vertical Cavity Surface-Emitting Lasers

Ya Ju Lee*, Ting Wei Yeh, Chen Zou, Zu Po Yang, Jia Wen Chen, Pei Lun Hsu, Ji Lin Shen, Chun Chieh Chang, Jinn Kong Sheu, Lih Y. Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Nonzero-bandgap graphene quantum dots (GQDs) are novel optical gain materials promising for solution-processed light sources with high cost efficiency and device performance. Currently, there have only been a few reports on the realization of GQDs-based lasers. Herein, we demonstrate for the first time room-temperature lasing emission with green gamut from GQDs in a vertical optical cavity composed of Ta2O5/SiO2 dielectric distributed Bragg reflectors (DBRs). The lasing is enabled by the unique design of the DBR, which not only provides a wide stopband spectrally overlapping with the emission of the GQDs but also allows high transmittance of optical excitation in the UV-light region. This demonstration is a clear evidence of the use of GQDs as optical gain materials and represents an important step forward toward their potential applications in wide-gamut laser displays and projectors.

Original languageEnglish
Pages (from-to)2894-2901
Number of pages8
JournalACS Photonics
Issue number11
Publication statusPublished - 2019 Nov 20


  • Distributed Bragg Reflectors (DBRs)
  • Graphene Quantum Dots
  • Green Gap
  • Microwave-Assisted Hydrothermal Method
  • Vertical Cavity Surface-Emitting Laser

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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