PtTe2 -Based Type-II Dirac Semimetal and Its van der Waals Heterostructure for Sensitive Room Temperature Terahertz Photodetection
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim..
Recent years have witnessed rapid progresses made in the photoelectric performance of two-dimensional materials represented by graphene, black phosphorus, and transition metal dichalcogenides. Despite significant efforts, a photodetection technique capable for longer wavelength, higher working temperature as well as fast responsivity, is still facing huge challenges due to a lack of best among bandgap, dark current, and absorption ability. Exploring topological materials with nontrivial band transport leads to peculiar properties of quantized phenomena such as chiral anomaly, and magnetic-optical effect, which enables a novel feasibility for an advanced optoelectronic device working at longer wavelength. In this work, the direct generation of photocurrent at low energy terahertz (THz) band at room temperature is implemented in a planar metal-PtTe2 -metal structure. The results show that the THz photodetector based on PtTe2 with bow-tie-type planar contacts possesses a high photoresponsivity (1.6 A W-1 without bias voltage) with a response time less than 20 µs, while the PtTe2 -graphene heterostructure-based detector can reach responsivity above 1.4 kV W-1 and a response time shorter than 9 µs. Remarkably, it is already exploitable for large area imaging applications. These results suggest that topological semimetals such as PtTe2 can be ideal materials for implementation in a high-performing photodetection system at THz band.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:15 |
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| Enthalten in: |
Small (Weinheim an der Bergstrasse, Germany) - 15(2019), 52 vom: 05. Dez., Seite e1903362 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Xu, Huang [VerfasserIn] |
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| Links: |
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| Themen: |
Journal Article |
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| Anmerkungen: |
Date Revised 04.03.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/smll.201903362 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM303394129 |
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| 520 | |a © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | ||
| 520 | |a Recent years have witnessed rapid progresses made in the photoelectric performance of two-dimensional materials represented by graphene, black phosphorus, and transition metal dichalcogenides. Despite significant efforts, a photodetection technique capable for longer wavelength, higher working temperature as well as fast responsivity, is still facing huge challenges due to a lack of best among bandgap, dark current, and absorption ability. Exploring topological materials with nontrivial band transport leads to peculiar properties of quantized phenomena such as chiral anomaly, and magnetic-optical effect, which enables a novel feasibility for an advanced optoelectronic device working at longer wavelength. In this work, the direct generation of photocurrent at low energy terahertz (THz) band at room temperature is implemented in a planar metal-PtTe2 -metal structure. The results show that the THz photodetector based on PtTe2 with bow-tie-type planar contacts possesses a high photoresponsivity (1.6 A W-1 without bias voltage) with a response time less than 20 µs, while the PtTe2 -graphene heterostructure-based detector can reach responsivity above 1.4 kV W-1 and a response time shorter than 9 µs. Remarkably, it is already exploitable for large area imaging applications. These results suggest that topological semimetals such as PtTe2 can be ideal materials for implementation in a high-performing photodetection system at THz band | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a terahertz detection | |
| 650 | 4 | |a topological semimetals | |
| 650 | 4 | |a transition metal dichalcogenides | |
| 650 | 4 | |a van der Waals (vdW) heterostructures | |
| 700 | 1 | |a Guo, Cheng |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Jiazhen |e verfasserin |4 aut | |
| 700 | 1 | |a Guo, Wanlong |e verfasserin |4 aut | |
| 700 | 1 | |a Kuo, Chia-Nung |e verfasserin |4 aut | |
| 700 | 1 | |a Lue, Chin Shan |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Weida |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Lin |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Gang |e verfasserin |4 aut | |
| 700 | 1 | |a Politano, Antonio |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Xiaoshuang |e verfasserin |4 aut | |
| 700 | 1 | |a Lu, Wei |e verfasserin |4 aut | |
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