Quantum-Confined Stark Effect of Individual Defects in a van der Waals Heterostructure
| Autor: | A. Nick Vamivakas, Vincent Meunier, Anthony Yoshimura, Sajal Dhara, Kenneth M. Goodfellow, Chitraleema Chakraborty |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics::Optics
Field effect Bioengineering 02 engineering and technology 01 natural sciences law.invention Condensed Matter::Materials Science symbols.namesake chemistry.chemical_compound law 0103 physical sciences Monolayer Tungsten diselenide General Materials Science 010306 general physics Condensed matter physics Chemistry Graphene Mechanical Engineering Quantum-confined Stark effect Heterojunction General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Stark effect symbols van der Waals force 0210 nano-technology |
| Zdroj: | Nano Letters. 17:2253-2258 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.6b04889 |
| Popis: | The optical properties of atomically thin semiconductor materials have been widely studied because of the isolation of monolayer transition metal dichalcogenides (TMDCs). They have rich optoelectronic properties owing to their large direct bandgap, the interplay between the spin and the valley degree of freedom of charge carriers, and the recently discovered localized excitonic states giving rise to single photon emission. In this Letter, we study the quantum-confined Stark effect of these localized emitters present near the edges of monolayer tungsten diselenide (WSe2). By carefully designing sequences of metallic (graphene), insulating (hexagonal boron nitride), and semiconducting (WSe2) two-dimensional materials, we fabricate a van der Waals heterostructure field effect device with WSe2 hosting quantum emitters that is responsive to external static electric field applied to the device. A very efficient spectral tunability up to 21 meV is demonstrated. Further, evaluation of the spectral shift in the ph... |
| Databáze: | OpenAIRE |
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