Spinor polariton condensates under nonresonant pumping: Steady states and elementary excitations

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	Spinor polariton condensates under nonresonant pumping: Steady states and elementary excitations
	Xu, Xingran; Hu, Ying; Zhang, Zhidong; Liang, Zhaoxin; Liang, ZX (reprint author), Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Peoples R China.
	2017-10-20
发表期刊	AMER PHYSICAL SOC
ISSN	2469-9950
卷号	96 期号:14 页码:-
摘要	We theoretically investigate a spinor polariton condensate under nonresonant pumping, based on driven-dissipative Gross-Pitaevskii equations coupled to the rate equation of a spin-unpolarized reservoir. We find the homogeneous polariton condensate can transit from the spin-unpolarized phase, where it is linearly polarized, to the spin-polarized phase, where it is elliptically polarized, depending on the cross-spin versus same-spin interactions and the linear polarization splitting. In both phases, we study elementary excitations using Bogoliubov approach, in a regime where the decay rate of total exciton density in reservoir crosses over from the slow to the fast limit. Depending on reservoir parameters, the global-phase mode can be either diffusive or gapped. By contrast, the relative-phase mode always possesses a gapped energy, undamped in the spin-unpolarized phase but weakly damped in the spin-polarized phase. In the spin-unpolarized phase, both modes are linearly polarized despite pumping and decay. However, in the spin-polarized phase, the mode polarization can be significantly affected by the reservoir and depends strongly on the circular polarization degree of the condensate. Interestingly, we demonstrate that the "ghost" branch of the Bogoliubov spectrum of the relative-phase mode can be visualized in the photoluminescence emission, distinguishable from that of the global-phase mode and thus allowing for experimental observation, when the spinor polariton condensate is elliptically polarized.; We theoretically investigate a spinor polariton condensate under nonresonant pumping, based on driven-dissipative Gross-Pitaevskii equations coupled to the rate equation of a spin-unpolarized reservoir. We find the homogeneous polariton condensate can transit from the spin-unpolarized phase, where it is linearly polarized, to the spin-polarized phase, where it is elliptically polarized, depending on the cross-spin versus same-spin interactions and the linear polarization splitting. In both phases, we study elementary excitations using Bogoliubov approach, in a regime where the decay rate of total exciton density in reservoir crosses over from the slow to the fast limit. Depending on reservoir parameters, the global-phase mode can be either diffusive or gapped. By contrast, the relative-phase mode always possesses a gapped energy, undamped in the spin-unpolarized phase but weakly damped in the spin-polarized phase. In the spin-unpolarized phase, both modes are linearly polarized despite pumping and decay. However, in the spin-polarized phase, the mode polarization can be significantly affected by the reservoir and depends strongly on the circular polarization degree of the condensate. Interestingly, we demonstrate that the "ghost" branch of the Bogoliubov spectrum of the relative-phase mode can be visualized in the photoluminescence emission, distinguishable from that of the global-phase mode and thus allowing for experimental observation, when the spinor polariton condensate is elliptically polarized.
部门归属	[xu, xingran ; zhang, zhidong] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, liaoning, peoples r china ; [xu, xingran ; zhang, zhidong] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china ; [xu, xingran ; liang, zhaoxin] zhejiang normal univ, dept phys, jinhua 321004, peoples r china ; [hu, ying] shanxi univ, state key lab quantum opt & quantum opt devices, inst laser spect, taiyuan 030006, shanxi, peoples r china ; [hu, ying] shanxi univ, collaborat innovat ctr extreme opt, taiyuan 030006, shanxi, peoples r china
学科领域	Physics, Condensed Matter
资助者	National Natural Science Foundation of China [11274315, 11374125, 11434007, 51331006]; Youth Innovation Promotion Association of Chinese Academy of Sciences [2013125]; National Key R&D Program of China [2017YFA0304203]; Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China [IRT13076]; Fund for Shanxi "1331 Project" Key Subjects Construction
收录类别	SCI
语种	英语
WOS记录号	WOS:000413372500001
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79039
专题	中国科学院金属研究所
通讯作者	Liang, ZX (reprint author), Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Peoples R China.
推荐引用方式 GB/T 7714	Xu, Xingran,Hu, Ying,Zhang, Zhidong,et al. Spinor polariton condensates under nonresonant pumping: Steady states and elementary excitations[J]. AMER PHYSICAL SOC,2017,96(14):-.
APA	Xu, Xingran,Hu, Ying,Zhang, Zhidong,Liang, Zhaoxin,&Liang, ZX .(2017).Spinor polariton condensates under nonresonant pumping: Steady states and elementary excitations.AMER PHYSICAL SOC,96(14),-.
MLA	Xu, Xingran,et al."Spinor polariton condensates under nonresonant pumping: Steady states and elementary excitations".AMER PHYSICAL SOC 96.14(2017):-.