摘要
利用激光脉冲沉积(PLD)技术在(302)γ-LiAlO2衬底上成功生长了非极性的a面(1120)ZnO薄膜,光致发光谱(PL)带边发射峰半峰宽仅为115meV.研究了非极性ZnO薄膜光谱特性的面内各向异性,发现随着入射光偏振方向改变,在偏振透射光谱上,吸收边移动了20meV,这与A、B激子和C激子的能量差一致;而在拉曼光谱上,激发光偏振方向的改变导致E2模式的强度发生明显改变.
Nonpolar a-plane ZnO film was successfully grown on （302）γ-LiAlO2 substrate by pulsed laser deposition. The temperature of substrate was 500℃, the film was pure nonpolar a-plane ZnO. The FWHM of the peak of near band emission in the PL spectrum was found to be only 115 meV. Both polarized transmission spectra and polarized Raman spectra revealed the in-plane anisotropy of the nonpolar ZnO film by the shift of absorption edge and the change of intensity of Raman E2 mode.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第1期430-433,共4页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60676004)
上海市科技项目(批准号:06dz11402)
国家高技术研究发展计划(863)(批准号:2006AA03A101,2006AA03A103)资助的课题~~
