Ultraviolet lasing and field emission characteristics of ZnO nano-rods synthesized by nano-particle-assisted pulsed-laser ablation deposition |
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| Authors: | T Okada K Kawashima M Ueda |
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| Institution: | (1) Department of Electrical and Electronic Systems Engineering, Kyushu University, Fukuoka 812-8581, Japan |
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| Abstract: | We describe the lasing and the field emission characteristics of ZnO nano-rod crystals synthesized by nano-particle-assisted pulsed-laser ablation deposition, where nano-particles formed in the gas phase by the condensation of the laser-ablated species are transported on to the substrate to form nanorods. The nano-rod crystals having a hexagonal shape with a pyramidal top were synthesized on a sapphire substrate by a single-step process. The nano-rod crystals act as an efficient ultraviolet emitter showing the stimulated emission under an optical excitation and also act as field emitters with a current density of 1 mA/cm2 at an electric field strength of 16 V/μm. PACS 42.70.Hj; 85.45.Db; 81.05.Ea; 81.15.Fy |
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