Stark Effect Spectroscopy of Mono- and Few-Layer MoS2

Overview

Journal Nano Lett

Publisher American Chemical Society

Specialty Biotechnology

Date 2016 Feb 5

PMID 26845085

Citations 5

Authors

J Klein

J Wierzbowski

A Regler

J Becker

F Heimbach

K Muller

M Kaniber

J J Finley

Affiliations

Soon will be listed here.

Abstract

We demonstrate electrical control of the A-exciton interband transition in mono- and few-layer MoS2 crystals embedded into photocapacitor devices via the DC Stark effect. Electric field-dependent low-temperature photoluminescence spectroscopy reveals a significant tuneability of the A-exciton transition energy up to ∼ 16 meV from which we extract the mean DC exciton polarizability ⟨β̅N⟩ = (0.58 ± 0.25) × 10(-8) Dm V(-1). The exciton polarizability is shown to be layer-independent, indicating a strong localization of both electron and hole wave functions in each individual layer.

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