机构

• 长春光学精密机械与物... [2]
• 上海光学精密机械研究... [1]

采集方式

• OAI收割 [3]

内容类型

• 会议论文 [2]
• 学位论文 [1]

发表日期

• 2008 [1]
• 2007 [1]

学科主题

• 光学工程 [1]

筛选

浏览/检索结果: 共3条，第1-3条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Characteristics of ZnMgO-based metal-semiconductor-metal photodetectors (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Photoelectronic Imaging and Detection, September 9, 2007 - September 12, 2007, Beijing, China 作者:  Zhang J.;  Li B.;  Li B.;  Li B.;  Zhao Y. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 In recent years  ZnMgO semiconductor alloys  with a direct bandgap tunable between 3.37 eV and 7.8 eV  become one of the most suitable materials for the fabrication of ultraviolet detectors. In this paper  we have fabricated metal-semiconductor-metal photodetectors on 1-m thick Zn 0.8Mg0.2O films. The interdigital metal electrodes are 500 m long and 5 m wide with an interelectrode spacing 2 m  5 m and 10 m  respectively. Zn0.8Mg0.2O films were grown on quartz by ratio frequency magnetron sputtering at 500C. Dark current  spectral responsivity and pulse response were carried out for the devices with different finger pitches. All the photodetectors showed the peak responsivity at 330 nm and the ultraviolet-visible rejection ratio (R330 nm/R400 nm) is more than four orders of magnitude at 3 V bias. For the device with 2 m finger pitch  the detectivity was calculated as 4.21011 cm Hz 1/2/W at 330 nm. Furthermore  the transient response measurement for all devices revealed similar rise time of 10 ns. The 90%-10% fall times are 130 ns  170 ns and 230 ns for the devices with different finger pitches of 2 m  5 m and 10 m  respectively..   Tunable ultraviolet laser source from a frequency doubled alexandrite laser (EI CONFERENCE) 会议论文  OAI收割 Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China Shuhang L.; Jingjiao L.; Lijun W. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 A tunable ultraviolet laser source in the spectrum range of 0.36-0.388 m was obtained as second harmonics from a frequency doubled Alexandrite laser whose output covers the wave range over 0.72-0.78 m. A LBO crystal was used as frequency doubling crystal. The phase mateching angle in the wide spectrum range of the crystal was calculated  and the crystal was cut in the way that the normal incidence at the center wavelength of the fundamental wave at the crystal. The output spectrum line was measured and the highest second harmonics conversion efficiency reached 1.2% from long pulse fundamental wave at the center wavelength.   宽调谐、窄线宽中红外PPMgLN晶体双共振光学参量振荡技术 学位论文  OAI收割 作者:  董怡静   |  收藏  |  浏览/下载：29/0  |  提交时间：2018/12/26 光学参量振荡器  optical parametric oscillator  窄线宽  narrow bandwidth  准相位匹配  Quasi phase matching  宽调谐  Wide tunable  PPMgLN  PPMgLN