CAJ | 학술논문

通过水热法在溅射了一层金的Si片上生长了ZnO纳米棒.实验观察到ZnO纳米棒的室温光致发光谱中出现了强的紫外发射峰,同时还伴随有弱的缺陷相关的发射,这表明通过该种方法生长的ZnO纳米棒晶体质量较好.同时,通过光泵浦也观察到了ZnO纳米棒中的激光发射.当激发光功率密度超过阈值,且进一步增加时则出现多个发射峰,其积分强度随着激发功率密度的增大呈非线性增长,进一步表明存在受激发射.利用金属层作为反射镜可以进一步降低损耗,从而达到降低阈值的目的.
통과수열법재천사료일층금적Si편상생장료ZnO납미봉.실험관찰도ZnO납미봉적실온광치발광보중출현료강적자외발사봉,동시환반수유약적결함상관적발사,저표명통과해충방법생장적ZnO납미봉정체질량교호.동시,통과광빙포야관찰도료ZnO납미봉중적격광발사.당격발광공솔밀도초과역치,차진일보증가시칙출현다개발사봉,기적분강도수착격발공솔밀도적증대정비선성증장,진일보표명존재수격발사.이용금속층작위반사경가이진일보강저손모,종이체도강저역치적목적.
ZnO nanorods were grown on a thin Au layer by hydrothermal method.In the photoluminescence (PL)spectrum,a strong UV emission and a weak deep-level emission were observed.The optically pumped lasing could be detected in ZnO nanorods.The integrated intensity of the spectra increases nonlinearly with the excitation power density,which indicated there exists the stimulated emission.And multi-mode emission peaks emerged when the excitation power density exceeded the threshold.Using Au layer as mirror,the light loss was further decreased,which resulted in the decrease of the laser threshold to 31.2 kW/cm2.