Electric-field-induced optical hysteresis in single-layer WSe2

被引：7

作者：

Sun, Zheng ^{[1
]}

Beaumariage, Jonathan ^{[1
]}

Xu, Ke ^{[2
]}

Liang, Jierui ^{[2
]}

Hou, Shaocong ^{[3
]}

Forrest, Stephen R. ^{[3
]}

Fullerton-Shirey, Susan K. ^{[2
]}

Snoke, David W. ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[2] Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15260 USA

[3] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

来源：

APPLIED PHYSICS LETTERS | 2019年 / 115卷 / 16期

基金：

美国国家科学基金会;

关键词：

LIGHT-EMITTING-DIODES; MONOLAYER;

D O I：

10.1063/1.5123514

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate that the exciton energy of a monolayer of tungsten diselenide on an SiO2/Si substrate can be tuned by an applied in-plane electric field for two samples with different dielectric capping materials. The exciton energy can be either red- or blue-shifted by up to 20 meV based on the polarity of the applied electric field. We argue that a piezoelectric effect creates a large internal electric field, which is either partially aligned or partially antialigned with the external electric field. Additionally, optical hysteresis is observed on cycling of the external electric field due to trapped charges. Published under license by AIP Publishing.

引用

页数：4

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