AZO nanowires as a random laser

Abstract

ZnO nanowires doped with Aluminium (AZO) grown by chemical bath deposition technique on ITO/glass substrates exhibit random lasing emission with lowest threshold of just 0.07 W/cm2 when 12.5 % of aluminium nitride was added during the growth of the nanorods. Compared to pure ZnO nanorods, grown with the same parameters, threshold was at least 2 orders of magnitude lower. Results overall indicate incorporating aluminium reduces threshold for random lasers however improvements in doping high aluminium content without affecting growth is required to reduce the threshold at high doping levels.

Review of Open Cavity Random Lasers as Laser-Based Sensors

“…Tunability can be achieved by changing the weight fraction, particle size, and photonic crystal lattice and adding a nonfluorescent dye to the gain medium . A more recent approach to tuning a random laser is by doping the gain material with metal or inorganic elements that shifts the bandgap of the material. ,, The threshold for these doped random lasers varies but is much smaller (at least 1 order of magnitude) than the material without doping elements.…”

“…53 A more recent approach to tuning a random laser is by doping the gain material with metal or inorganic elements that shifts the bandgap of the material. 6,54,101 The threshold for these doped random lasers varies but is much smaller (at least 1 order of magnitude) than the material without doping elements. ■ LASER-BASED SENSING OVERVIEW Laser-based sensors have been reported to address critical challenges in creating reliable, real-time, and cost-effective monitoring integrated systems which are robust to changes in chemical composition over extended periods of time.…”