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

3 Scopus citations

Abstract

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
JournalACS Photonics
DOIs
StateAccepted/In press - 1 Jan 2019

Keywords

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

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