Multilayer Black Phosphorus as a Versatile Mid-Infrared Electro-optic Material

被引：157

作者：

Lin, Charles ^{[1
]}

Grassi, Roberto ^{[2
]}

Low, Tony ^{[2
]}

Helmyt, Amr S. ^{[1
]}

机构：

[1] Univ Toronto, Edward S Rogers Dept Elect & Comp Engn, 10 Kings Coll Rd, Toronto, ON M5S 3G4, Canada

[2] Univ Minnesota, Dept Elect & Comp Engn, 200 Union St SE,4-174 Keller Hall, Minneapolis, MN 55455 USA

来源：

NANO LETTERS | 2016年 / 16卷 / 03期

关键词：

Black phosphorus; electro-optics; quantum-confined Franz-Keldysh effect; Burstein-Moss shift; mid-infrared; modulator; FIELD-EFFECT TRANSISTORS; QUANTUM-WELL STRUCTURES; GRAPHENE; MODULATORS; ELECTROABSORPTION; SILICON; GERMANIUM; MOBILITY;

D O I：

10.1021/acs.nanolett.5b04594

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigate the electro-optic properties of black phosphorus (BP) thin films for optical modulation in the mid-infrared frequencies. Our calculation indicates that an applied out-of-plane electric field may lead to red-, blue-, or bidirectional shift in BP's absorption edge. This is due to the interplay between the field-induced quantum-confined Franz-Keldysh effect and the Pauli-blocked Burstein-Moss shift. The relative contribution of the two electro-absorption mechanisms depends on doping range, operating wavelength, and BP film thickness. For proof-of concept, simple modulator configuration with BP overlaid over a silicon nanowire is studied. Simulation results show that operating BP in the quantum-confined Franz-Keldysh regime can improve the maximal attainable absorption as well as power efficiency compared to its graphene counterpart.

引用

页码：1683 / 1689

页数：7

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