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Title: Lasing action in gallium nitride quasicrystal nanorod arrays. Author: Chang SP, Sou KP, Chen CH, Cheng YJ, Huang JK, Lin CH, Kuo HC, Chang CY, Hsieh WF. Journal: Opt Express; 2012 May 21; 20(11):12457-62. PubMed ID: 22714233. Abstract: We report the observation of lasing action from an optically pumped gallium nitride quasicrystal nanorod arrays. The nanorods were fabricated from a GaN substrate by patterned etching, followed by epitaxial regrowth. The nanorods were arranged in a 12-fold symmetric quasicrystal pattern. The regrowth grew hexagonal crystalline facets and core-shell multiple quantum wells (MQWs) on nanorods. Under optical pumping, multiple lasing peaks resembling random lasing were observed. The lasing was identified to be from the emission of MQWs on the nanorod sidewalls. The resonant spectrum and mode field of the 12-fold symmetric photonic quasicrystal nanorod arrays is discussed.[Abstract] [Full Text] [Related] [New Search]