A Highly-Efficient Single Segment White Random Laser

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • Golam Haider
  • Hung-I Lin
  • Kanchan Yadav
  • Kun-Ching Shen
  • Yu-Ming Liao
  • Han-Wen Hu
  • Pradip Kumar Roy
  • Krishna Prasad Bera
  • Kung-Hsuan Lin
  • Hsien-Ming Lee
  • Yit-Tsong Chen
  • Yang-Fang Chen


Original languageEnglish
Pages (from-to)11847-11859
Journal / PublicationACS Nano
Issue number12
Online published23 Oct 2018
Publication statusPublished - 26 Dec 2018
Externally publishedYes


Production of multicolor or multiple wavelength lasers over the full visible-color spectrum from a single chip device has widespread applications, such as superbright solid-state lighting, color laser displays, light-based version of Wi-Fi (Li-Fi), and bioimaging, etc. However, designing such lasing devices remains a challenging issue owing to the material requirements for producing multicolor emissions and sophisticated design for producing laser action. Here we demonstrate a simple design and highly efficient single segment white random laser based on solution-processed NaYF4:Yb/Er/Tm@NaYF4:Eu core-shell nanoparticles assisted by Au/MoO3 multilayer hyperbolic meta-materials. The multicolor lasing emitted from core-shell nanoparticles covering the red, green, and blue, simultaneously, can be greatly enhanced by the high photonic density of states with a suitable design of hyperbolic meta-materials, which enables decreasing the energy consumption of photon propagation. As a result, the energy upconversion emission is enhanced by ∼50 times with a drastic reduction of the lasing threshold. The multiple scatterings arising from the inherent nature of the disordered nanoparticle matrix provide a convenient way for the formation of closed feedback loops, which is beneficial for the coherent laser action. The experimental results were supported by the electromagnetic simulations derived from the finite-difference time-domain (FDTD) method. The approach shown here can greatly simplify the design of laser structures with color-tunable emissions, which can be extended to many other material systems. Together with the characteristics of angle free laser action, our device provides a promising solution toward the realization of many laser-based practical applications.

Research Area(s)

  • high photonic density of states, hyperbolic meta-materials, single segment multicolor laser, up-conversion, white random laser

Citation Format(s)

A Highly-Efficient Single Segment White Random Laser. / Haider, Golam; Lin, Hung-I; Yadav, Kanchan; Shen, Kun-Ching; Liao, Yu-Ming; Hu, Han-Wen; Roy, Pradip Kumar; Bera, Krishna Prasad; Lin, Kung-Hsuan; Lee, Hsien-Ming; Chen, Yit-Tsong; Chen, Fu-Rong; Chen, Yang-Fang.

In: ACS Nano, Vol. 12, No. 12, 26.12.2018, p. 11847-11859.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review