Title :
Ultraviolet lasing from spherical ZnO microcrystal produced by laser ablation in air
Author :
Daisuke Nakamura;Toshinobu Tanaka;Tatsuya Ikebuchi;Takeshi Ueyama;Fumiaki Nagasaki;Yuki Fujiwara;Mitsuhiro Higashihata;Hiroshi Ikenoue;Tatsuo Okada
Author_Institution :
Graduate School of Information Science and Electrical Engineering, Kyushu University, Japan
Abstract :
We succeeded in synthesizing spherical ZnO microcrystals by a simple laser ablation in air, and we obtained ultraviolet whispering-gallery-mode (WGM) lasing from the microcrystal under pulsed laser excitation. In addition, room-temperature electroluminescence from the ZnO microsphere/p-GaN heterojunction was achieved under forward bias. Recently, doped ZnO spherical crystals are successfully synthesized using dopant contained targets and its optical characteristics were investigated.
Keywords :
"Zinc oxide","II-VI semiconductor materials","Lasers","Scanning electron microscopy","Photonic band gap","Doping","Substrates"
Conference_Titel :
Microoptics Conference (MOC), 2015 20th
Print_ISBN :
978-4-8634-8487-0
DOI :
10.1109/MOC.2015.7416404
