Lasing action in gallium nitride quasicrystal nanorod arrays.
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.
Department of Photonics, National Chiao Tung University, 1001 Ta Hsueh Rd Hsinchu 300, Taiwan.
Shih-Pang
SP
Chang
Kuok-Pan
KP
Sou
Chieh-Han
CH
Chen
Yuh-Jen
YJ
Cheng
Ji-Kai
JK
Huang
Chung-Hsiang
CH
Lin
Hao-Chung
HC
Kuo
Chun-Yen
CY
Chang
Wen-Feng
WF
Hsieh
D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry*; D007834:Lasers; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*
C473348:gallium nitride; D005708:Gallium