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Open AccessInfrared fingerprints of few-layer black phosphorus
Black phosphorus is an infrared layered material. Its bandgap complements other widely studied two-dimensional materials: zero-gap graphene and visible/near-infrared gap transition metal dichalcogenides. Altho...
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Article
Open AccessStrain-tunable van der Waals interactions in few-layer black phosphorus
Interlayer interactions in 2D materials, also known as van der Waals (vdWs) interactions, play a critical role in the physical properties of layered materials. It is fascinating to manipulate the vdWs interact...
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Open AccessVan der Waals thin films of WTe2 for natural hyperbolic plasmonic surfaces
A hyperbolic plasmonic surface supports highly directional propagating polaritons with extremely large density of states. Such plasmon polaritons have been realized in artificially structured metasurfaces. How...
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Article
Open AccessThe optical conductivity of few-layer black phosphorus by infrared spectroscopy
The strength of light-matter interaction is of central importance in photonics and optoelectronics. For many widely studied two-dimensional semiconductors, such as MoS2, the optical absorption due to exciton reso...
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Article
Open AccessPlasmons in the van der Waals charge-density-wave material 2H-TaSe2
Plasmons in two-dimensional (2D) materials beyond graphene have recently gained much attention. However, the experimental investigation is limited due to the lack of suitable materials. Here, we experimentally...
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Open AccessPrediction of hyperbolic exciton-polaritons in monolayer black phosphorus
Hyperbolic polaritons exhibit large photonic density of states and can be collimated in certain propagation directions. The majority of hyperbolic polaritons are sustained in man-made metamaterials. However, n...
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Article
Open AccessUltra-sensitive polarization-resolved black phosphorus homojunction photodetector defined by ferroelectric domains
With the further miniaturization and integration of multi-dimensional optical information detection devices, polarization-sensitive photodetectors based on anisotropic low-dimension materials have attractive p...
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Article
Open AccessLayer-dependent exciton polarizability and the brightening of dark excitons in few-layer black phosphorus
The evolution of excitons from 2D to 3D is of great importance in photo-physics, yet the layer-dependent exciton polarizability hasn’t been investigated in 2D semiconductors. Here, we determine the exciton pol...
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Open AccessTunable anisotropic van der Waals films of 2M-WS2 for plasmon canalization
In-plane anisotropic van der Waals materials have emerged as a natural platform for anisotropic polaritons. Extreme anisotropic polaritons with in-situ broadband tunability are of great significance for on-chi...
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Article
Open AccessCounterfactual thinking induces different neural patterns of memory modification in anxious individuals
Episodic counterfactual thinking (eCFT) is the process of mentally simulating alternate versions of experiences, which confers new phenomenological properties to the original memory and may be a useful therape...
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Article
Open AccessStatic graph approximations of dynamic contact networks for epidemic forecasting
Epidemic modeling is essential in understanding the spread of infectious diseases like COVID-19 and devising effective intervention strategies to control them. Recently, network-based disease models have integ...