Conduction band discontinuity and carrier multiplication at the MgxZn1-xO/MgyZn1-yO interface

	Conduction band discontinuity and carrier multiplication at the MgxZn1-xO/MgyZn1-yO interface
	Xie, X. H.; B. H. Li; Z. Z. Zhang; S. P. Wang and D. Z. Shen
	2016
发表期刊	Rsc Advances
卷号	6 期号:41
摘要	Continuous-wave single-frequency 589 nm yellow laser can be used in laser cooling of sodium atoms. Besides, the interaction between 589 nm laser and sodium atoms can be studied by resonance fluorescence, which provides an important basis for the sodium guide star in the adaptive optics. In this paper, single frequency 589 nm yellow light is generated by sum frequency of single-block non-planar ring cavity 1064 nm and 1319 nm laser in periodically poled KTiOPO4 crystal. The geometric parameters of single-block non-planar Nd:YAG crystal and magnetic field intensity are optimally designed by simulation calculation through using Jones matrix. The output powers 1080 mW and 580 mW are obtained for continuous-wave single-frequency 1064 nm and 1319 nm laser in the experiment, respectively The two fundamental beams are expanded to be the same as perfectly as possible in size and are focused into a spot with a size of about 60 mu m by an achromatic lens. The sum-frequency generation takes place in a 1 mm x 2 mm x 20 mm phase-matched type-I periodically poled KTiOPO4 crystal with a matching temperature of 55 degrees C and polarization period of 12.35 mu m The crystal is anti-reflection coated for all three wavelengths (1064 nm, 1319 nm and 589 nm). A 14.8 mW output of 589 nm laser is obtained with beam quality factor M-2 = 1.14 and the corresponding sum-frequency efficiency is 0.9%. The influence of periodically poled KTiOPO4 temperature on the sum-frequency efficiency is studied and the temperature acceptance bandwidth is measured to be 1.5 degrees The wavelength of 589 nm yellow light can be tuned to the sodium atom D-2a absorption line by changing the temperature of 1064 nm Nd:YAG crystal and 0.164 pm of tuning accuracy is reached. The whole laser system is stable and reliable, so it provides a practical and effective technical means to obtain the continuous-wave single-frequency 589 nm laser, for it is relatively simple and easy to implement.
文章类型	期刊
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/57302
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Xie, X. H.,B. H. Li,Z. Z. Zhang,et al. Conduction band discontinuity and carrier multiplication at the MgxZn1-xO/MgyZn1-yO interface[J]. Rsc Advances,2016,6(41).
APA	Xie, X. H.,B. H. Li,Z. Z. Zhang,&S. P. Wang and D. Z. Shen.(2016).Conduction band discontinuity and carrier multiplication at the MgxZn1-xO/MgyZn1-yO interface.Rsc Advances,6(41).
MLA	Xie, X. H.,et al."Conduction band discontinuity and carrier multiplication at the MgxZn1-xO/MgyZn1-yO interface".Rsc Advances 6.41(2016).

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