Title :
Metal-oxide-SiO2 composite ZnO lasers
Author :
Leong, Eunice S P ; Yu, S.F. ; Chong, M.K. ; Tan, O.K. ; Pita, K.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
The use of metal-oxide-SiO2 composite to sustain random lasing in ZnO thin films is proposed. It is shown that the presence of stripe pattern in the metal-oxide-SiO2 composite is necessary to minimize lasing threshold and achieve directional emission. By controlling the concentration of the metal-oxide and stripe spacing, coherent lasing threshold and linewidth of ∼85 kW/cm2 and ∼0.4 nm, respectively, can be obtained from mirrorless ZnO thin-film waveguide lasers.
Keywords :
II-VI semiconductors; nanocomposites; nanoparticles; semiconductor lasers; semiconductor thin films; silicon compounds; ultraviolet sources; waveguide lasers; wide band gap semiconductors; zinc compounds; ZnO; directional emission; lasing threshold; metal-oxide-SiO2 composite ZnO lasers; random lasing; stripe spacing; thin-film waveguide lasers; Optical buffering; Optical films; Optical filters; Optical refraction; Optical scattering; Optical variables control; Refractive index; Transistors; Waveguide lasers; Zinc oxide; Nanocomposite; random lasing; sol-gel waveguide; zinc oxide;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.853010
