Shanghai Institute of Technical Physics

Interfacial ferroelectricity at naturally-formed van der Waals interfaces

Sliding ferroelectrics emerge as compelling candidates for next-generation wafer-level non-volatile storage applications with low power consumption and high packing density. However, artificially stacked sliding ferroelectrics with homogeneous/heterogeneous interfaces rely on hig...

Real‐Time Observation of Soliton Buildup and Self‐Organization in a GHz Harmonic Mode Locked Fiber Laser

ABSTRACT Ultrafast fiber lasers operating at GHz repetition rates are critical for applications requiring high‐speed optical pulse sources. To achieve such rates, passive harmonic mode locking (HML) constitutes a logical pathway, whose practical implementation is hampered by the...

Capillary‐Driven Patterned Transfer of MoS 2 Arrays for Gate‐Tunable Optoelectronic Computing

ABSTRACT 2D materials have emerged as promising building blocks for next‐generation electronic and optoelectronic devices. The clean transfer of high‐quality, as‐grown 2D materials onto target substrates is a crucial step toward their integration into advanced device architecture...

Four‐Channel Vectorial Metasurface Holography with Statistically Matched Patterns for Deceptive Optical Communication

ABSTRACT Metasurface holography has emerged as a powerful platform for high‐capacity optical encoding; however, conventional optical encryption typically hides information in stochastic noise, revealing the message only under specific polarization states. Here, we propose a decep...

Ultraviolet‐Induced Band Engineering in Black Phosphorus/Gallium Nitride Heterojunction Toward High‐Performance Broadband Photodetection

ABSTRACT Broadband photodetectors that combine ultraviolet sensitivity with visible and near‐infrared response are important for multispectral optoelectronic sensing. However, the performance of these photodetectors is often limited by weak interfacial carrier separation and inef...

Symmetry-cooperative optical-field engineering for ultrabroadband bulk photovoltaic photodetection

The bulk photovoltaic effect (BPVE) enables light-to-electricity conversion without external bias, but its practical reach is constrained by the rapid collapse of photoresponse at low photon energies. Here we show that this limitation can be overcome through cross-scale symmetry...

Ultrahigh Polarization Sensitivity via Bias‐Modulable Twisted Heterojunction Photodetectors With AoLP Detection and Polarity Reversal

ABSTRACT Polarization‐sensitive photodetection provides a critical degree of freedom for multidimensional optical information processing; however, achieving both high polarization selectivity and direct extraction of the angle of linear polarization (AoLP) within a single compact...

Residual-stress-driven deformation of thin-walled ring gears during hobbing

Thin-walled ring gears are prone to hobbing-induced distortion because material removal redistributes body residual stress (BRS) and introduces machining-induced residual stress (MIRS). This study distinguishes BRS and MIRS and establishes a coupled finite element method (FEM) wo...

Statistics-enhanced cross-domain perception network for spaceborne infrared tiny ship detection

Spaceborne thermal infrared remote sensing is indispensable for maritime surveillance and ship management, yet detecting tiny ships in infrared imagery remains challenging due to small object sizes, weak textures, and strong structured clutter. To address these challenges, we pro...

Direct evaporation of single-crystal metal contacts for 2D semiconductors

Metal contacts remain one of the key bottlenecks in two-dimensional (2D) semiconductor electronics. We developed an atomic-scale step-by-step evaporation method to directly grow single-crystal metals on monolayer semiconductors with clean interfaces. This method accesses a distin...

Large-scale array of squeezed light and synchronization using atomic vapor

Abstract Quantum light sources such as squeezed light are essential for quantum information science and technologies, but the scalable production of multiple beams of them remains a challenge. Here, we experimentally demonstrate a novel approach to the generation of a large spati...

EAT Thickness and BAT-Related Thermogenesis: Dual Imaging Phenotypes Associated with Hepatic Steatosis Severity in MASLD

Background: Metabolic dysfunction-associated steatotic liver disease (MASLD) is associated with ectopic fat accumulation and alterations in adipose tissue function. However, the relationships of structural and thermogenic adipose imaging markers with hepatic steatosis remain inco...

Giant bulk photovoltaic effect driven by interfacial symmetry breaking in MoS2/Ta2NiSe5 heterostructures

Van der Waals (vdW) heterostructures offer a versatile platform for engineering unconventional bulk photovoltaic (BPV) effect through interfacial symmetry breaking. However, the coexistence of multiple photophysical mechanisms, driven by structural complexity, spontaneous charge...

Long-Range Synchronization of Remote NV Color-Center Ensembles via an Active Microwave Cavity

For scalable quantum networks and distributed quantum sensing, remote NV color-center spin ensembles require controllable long-range coherent connections. However, the magnetic dipole coupling between NV centers decays rapidly with distance, making direct stable coherent exchange...

A look at nanowire photodetectors

Nanowire (NW) photodetectors have emerged as a prominent group of optoelectronic materials that have been extensively researched over the last two decades. They belong to the one-dimensional nanostructures and operate in the regime of wave optics because the diameter of the NW is...

Space-ConfinedGrowth of 2D Ultrathin Ternary CdZnTeFlakes toward High-Performance Photodetectors

Abstract Two-dimensional (2D) CdZnTe has been highly anticipated in high-performance photodetectors because of its excellent optoelectronic properties and the quantum confinement effect in 2D scale. However, due to the intrinsically nonlayered structure, the current obtained 2D C...

Multidimensional Sensing in Flexible Violet Phosphorus Photodetectors Driven by the Bulk Photovoltaic Effect

ABSTRACT The bulk photovoltaic effect (BPVE) generates zero bias photocurrents in systems with broken inversion symmetry, offering a junction free pathway for self‐powered optoelectronic devices and conceptually overcoming the Shockley‐Queisser efficiency limit of conventional ju...

Breathing ferroelectricity, flat-bands and multiple chiral phonons in van der Waals breathing kagome Nb3Cl8

Van der Waals layered Nb3X8 (X=Cl, Br, I) are predicted to integrate multiple intriguing physical properties, notably multiferroicity and flat-bands that are highly promising for novel-principle memories and superconductors. However, direct experimental validations such as the pr...

Crystallographic Orientation Controls Contact and Spin-Photoresponse in 2D Magnetic Heterostructures

Abstract Two-dimensional ferromagnetic semiconductors such as CrSBr offer exceptional air stability, strong magnetic anisotropy, and rich magneto-optoelectronic coupling, yet inefficient electrical contacts continue to limit carrier injection and spin transport in practical devic...

CDGP-Net: Channel-Decoupling and Geographic-Prior Fusion for Spatial Super-Resolution of HIRAS Radiances with Co-Platform MERSI-II

Hyperspectral infrared sounders provide valuable observations for numerical weather prediction (NWP), but their native nadir spatial resolution of approximately 12–16 km is coarser than the approximately 4 km grid spacing commonly used in convection-permitting regional forecastin...