Robust optical emission polarization in MoS2 monolayers through selective valley excitation

被引：387

作者：

Sallen, G. ^{[1
]}

Bouet, L. ^{[1
]}

Marie, X. ^{[1
]}

Wang, G. ^{[2
]}

Zhu, C. R. ^{[2
]}

Han, W. P. ^{[3
]}

Lu, Y. ^{[3
]}

Tan, P. H. ^{[3
]}

Amand, T. ^{[1
]}

Liu, B. L. ^{[2
]}

Urbaszek, B. ^{[1
]}

机构：

[1] Univ Toulouse, INSA, CNRS, UPS,LPCNO, F-31077 Toulouse, France

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Semiconductors, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 08期

关键词：

PHOTOLUMINESCENCE;

D O I：

10.1103/PhysRevB.86.081301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report polarization resolved photoluminescence from monolayer MoS2, a two-dimensional, noncentrosymmetric crystal with direct energy gaps at two different valleys in momentum space. The inherent chiral optical selectivity allows exciting one of these valleys, and close to 90% polarized emission at 4 K is observed with 40% polarization remaining at 300 K. The high polarization degree of the emission remains unchanged in transverse magnetic fields up to 9 T indicating robust, selective valley excitation.

引用

页数：4

共 24 条

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