scholarly journals Ultrasensitive and Self‐Powered Terahertz Detection Driven by Nodal‐Line Dirac Fermions and Van der Waals Architecture

2021 ◽  
pp. 2102088
Author(s):  
Libo Zhang ◽  
Zhuo Dong ◽  
Lin Wang ◽  
Yibin Hu ◽  
Cheng Guo ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Nodal Line ◽  
Dirac Fermions ◽  
Terahertz Detection ◽  
Self Powered

scholarly journals High performance self-powered photodetector based on 1D Te-2D WS2 mixed-dimensional heterostructure

2021 ◽  
Author(s):  
Lixiang Han ◽  
Mengmeng Yang ◽  
Peiting Wen ◽  
Wei Gao ◽  
nengjie huo ◽  
...  
Keyword(s):  
High Performance ◽  
Van Der Waals ◽  
Sharp Interface ◽  
Two Dimensional ◽  
High Quality ◽  
One Dimensional ◽  
Self Powered

One dimensional (1D)-two dimensional (2D) van der Waals (vdWs) mixed-dimensional heterostructures with advantages of atomically sharp interface, high quality and good compatibility have attracted tremendous attention in recent years. The...

scholarly journals Topological Insulator-Based van der Waals Heterostructures for Effective Control of Massless and Massive Dirac Fermions

Nano Letters ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 8047-8053 ◽  
Author(s):  
Su Kong Chong ◽  
Kyu Bum Han ◽  
Akira Nagaoka ◽  
Ryuichi Tsuchikawa ◽  
Renlong Liu ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Van Der Waals ◽  
Effective Control ◽  
Dirac Fermions ◽  
Van Der Waals Heterostructures

A Self-powered and Sensitive Terahertz Photodetection based on PdSe2

2022 ◽  
Author(s):  
Jie Zhou ◽  
Xueyan Wang ◽  
Zhiqingzi Chen ◽  
Libo Zhang ◽  
Chengyu Yao ◽  
...  
Keyword(s):  
Homeland Security ◽  
Room Temperature ◽  
Performance Enhancement ◽  
Rapid Development ◽  
Rapid Response ◽  
Medical Sciences ◽  
Terahertz Detection ◽  
Order Of Magnitude ◽  
Self Powered ◽  
Low Dimensional

Abstract With the rapid development of terahertz technology, terahertz detectors are expected to play a key role in diverse areas such as homeland security and imaging, materials diagnostics, biology and medical sciences, communication. Whereas self-powered, rapid response, and room temperature terahertz photodetectors are confronted with huge challenges. Here, we report a novel rapid response and self-powered terahertz photothermoelectronic (PTE) photodetector based on a low-dimensional material: palladium selenide (PdSe2). An order of magnitude performance enhancement was observed in photodetection based on PdSe2/graphene heterojunction that resulted from the integration of graphene and enhanced the Seebeck effect. Under 0.1 THz and 0.3 THz irradiation, the device displays a stable and repeatable photoresponse at room temperature without bias. Furthermore, rapid rise (5.0 μs) and decay (5.4 μs) times are recorded under 0.1 THz irradiation. Our results demonstrate the promising prospect of the detector based on PdSe2 in terms of air-stable, suitable sensitivity, and speed, which may have great application in terahertz detection.

scholarly journals A review of molybdenum disulfide (MoS2) based photodetectors: from ultra-broadband, self-powered to flexible devices

RSC Advances ◽  
2020 ◽  
Vol 10 (51) ◽  
pp. 30529-30602 ◽  
Author(s):  
Hari Singh Nalwa
Keyword(s):  
Transition Metal ◽  
Molybdenum Disulfide ◽  
Strong Interaction ◽  
Van Der Waals ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Van Der Waals Heterostructures ◽  
Flexible Devices ◽  
Metal Dichalcogenides ◽  
Self Powered

Two-dimensional transition metal dichalcogenides have attracted much attention in the field of optoelectronics due to their tunable bandgaps, strong interaction with light and tremendous capability for developing diverse van der Waals heterostructures with other nanomaterials.

scholarly journals Ultrafast and Sensitive Self-Powered Photodetector Featuring Self-Limited Depletion Region and Fully Depleted Channel with van der Waals Contacts

ACS Nano ◽  
2020 ◽  
Vol 14 (7) ◽  
pp. 9098-9106 ◽  
Author(s):  
Mingjin Dai ◽  
Hongyu Chen ◽  
Fakun Wang ◽  
Mingsheng Long ◽  
Huiming Shang ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Depletion Region ◽  
Fully Depleted ◽  
Self Powered ◽  
Van Der Waals Contacts

Mixed-dimensional Te/CdS van der Waals heterojunction for self-powered broadband photodetector

2021 ◽  
Author(s):  
Jinrong Yao ◽  
Fangfang Chen ◽  
Juanjuan Li ◽  
Junli Du ◽  
Di Wu ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Self Powered

High performance polarization-sensitive self-powered imaging photodetectors based on a p-Te/n-MoSe2 van der Waals heterojunction with strong interlayer transition

2021 ◽  
Author(s):  
Qixiao Zhao ◽  
Feng Gao ◽  
Hongyu Chen ◽  
Wei Gao ◽  
Mengjia Xia ◽  
...  
Keyword(s):  
Energy Consumption ◽  
High Performance ◽  
Imaging System ◽  
Van Der Waals ◽  
Low Energy ◽  
Low Energy Consumption ◽  
Comprehensive Performance ◽  
Self Powered

A p-Te/n-MoSe2 vdWH polarization-sensitive photodetector with high comprehensive performance is proposed, which would provide an opportunity for constructing a compact monolithic polarization-sensitive imaging system with low energy consumption.

scholarly journals Spectroscopic evidence for bulk-band inversion and three-dimensional massive Dirac fermions in ZrTe5

2017 ◽  
Vol 114 (5) ◽  
pp. 816-821 ◽  
Author(s):  
Zhi-Guo Chen ◽  
R. Y. Chen ◽  
R. D. Zhong ◽  
John Schneeloch ◽  
C. Zhang ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Van Der Waals ◽  
Three Dimensional ◽  
Zero Magnetic Field ◽  
Dirac Fermions ◽  
Spectroscopic Evidence ◽  
Band Inversion ◽  
Linear Band ◽  
Valence Bands ◽  
Bulk Band

Three-dimensional topological insulators (3D TIs) represent states of quantum matters in which surface states are protected by time-reversal symmetry and an inversion occurs between bulk conduction and valence bands. However, the bulk-band inversion, which is intimately tied to the topologically nontrivial nature of 3D Tis, has rarely been investigated by experiments. Besides, 3D massive Dirac fermions with nearly linear band dispersions were seldom observed in TIs. Recently, a van der Waals crystal, ZrTe5, was theoretically predicted to be a TI. Here, we report an infrared transmission study of a high-mobility [∼33,000 cm2/(V ⋅ s)] multilayer ZrTe5flake at magnetic fields (B) up to 35 T. Our observation of a linear relationship between the zero-magnetic-field optical absorption and the photon energy, a bandgap of ∼10 meV and aBdependence of the Landau level (LL) transition energies at low magnetic fields demonstrates 3D massive Dirac fermions with nearly linear band dispersions in this system. More importantly, the reemergence of the intra-LL transitions at magnetic fields higher than 17 T reveals the energy cross between the two zeroth LLs, which reflects the inversion between the bulk conduction and valence bands. Our results not only provide spectroscopic evidence for the TI state in ZrTe5but also open up a new avenue for fundamental studies of Dirac fermions in van der Waals materials.

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