Record-level quantum efficiency from a high polarization strained GaAs/GaAsP superlattice photocathode with distributed Bragg reflector

doi:10.1063/1.4972180

	Record-level quantum efficiency from a high polarization strained GaAs/GaAsP superlattice photocathode with distributed Bragg reflector
	Liu, Wei 1,2,3; Chen, Yiqiao 4; Lu, Wentao 4; Moy, Aaron 4; Poelker, Matthew 3; Stutzman, Marcy 3; Zhang, Shukui 3
刊名	APPLIED PHYSICS LETTERS
	2016-12-19
卷号	109 页码:5
ISSN号	0003-6951
DOI	10.1063/1.4972180
英文摘要	Photocathodes that provide high electron-spin polarization (ESP) and high quantum efficiency (QE) can significantly enhance the physics capabilities of electron accelerators. We report record-level QE from a high-polarization strained GaAs/GaAsP superlattice photocathode fabricated with a Distributed Bragg Reflector (DBR). The DBR photocathode technique enhances the absorption of incident laser light thereby enhancing QE, but as literature suggests, it is very challenging to optimize all of the parameters associated with the fabrication of complicated photocathode structures composed of many distinct layers. Past reports of DBR photocathodes describe high polarization but typically QE of only similar to 1%, which is comparable to QE of high polarization photocathodes grown without a DBR structure. This work describes a strained GaAs/GaAsP superlattice DBR photocathode exhibiting a high polarization of 84% and significantly enhanced QE of 6.4%. Published by AIP Publishing.
资助项目	U.S. DOE[DE-AC05-06OR23177] ; U.S. DOEs Office of Nuclear Physics SBIR program[DE-SC0009516]
WOS关键词	ELECTRON-SPIN POLARIZATION ; GAAS ; PHOTOEMISSION ; PHOTOELECTRONS ; INGAAS ; LAYER
WOS研究方向	Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000391857200010
资助机构	U.S. DOE ; U.S. DOEs Office of Nuclear Physics SBIR program
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/44119]
专题	中国科学院近代物理研究所
通讯作者	Liu, Wei
作者单位	1.Chinese Acad Sci, Inst Modern Phys, 509 Nanchang Rd, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 3.Thomas Jefferson Natl Accelerator Facil, 12000 Jefferson Ave, Newport News, VA 23606 USA 4.SVT Associates Inc, 7620 Executive Dr, Eden Prairie, MN 55344 USA
推荐引用方式 GB/T 7714	Liu, Wei,Chen, Yiqiao,Lu, Wentao,et al. Record-level quantum efficiency from a high polarization strained GaAs/GaAsP superlattice photocathode with distributed Bragg reflector[J]. APPLIED PHYSICS LETTERS,2016,109:5.
APA	Liu, Wei.,Chen, Yiqiao.,Lu, Wentao.,Moy, Aaron.,Poelker, Matthew.,...&Zhang, Shukui.(2016).Record-level quantum efficiency from a high polarization strained GaAs/GaAsP superlattice photocathode with distributed Bragg reflector.APPLIED PHYSICS LETTERS,109,5.
MLA	Liu, Wei,et al."Record-level quantum efficiency from a high polarization strained GaAs/GaAsP superlattice photocathode with distributed Bragg reflector".APPLIED PHYSICS LETTERS 109(2016):5.