National Engineering Research Center of Electromagnetic Radiation Control Materials

Large Electrostrain and High Optical Transmittance via Oxygen Octahedron Rotation Disordering in KNN Ceramics

ABSTRACT Lead‐free K 0.5 Na 0.5 NbO 3 (KNN)‐based ceramics are promising candidates for multifunctional electronic materials. Nevertheless, the synergistic optimization of electrostrain and optical transmittance in KNN polycrystalline ceramics remains a critical challenge, owing...

Synergistic Interfacial Anchoring and Defect Regulation via SAMs for Highly Stable Flexible Electrochromic Energy Storage Devices

ABSTRACT Flexible electrochromic energy storage devices (FECESDs) are highly promising for wearable electronics, integrating tunable optoelectronic properties with efficient energy storage. However, weak interfacial chemical anchoring and resultant mechanical delamination between...

Machine-Learning-Based GNSS Signal Anomaly Classification Using COSMIC-2 POD Data

Ionospheric scintillation and radio frequency interference (RFI) affect Global Navigation Satellite System (GNSS) signals, making their distinction important for ionospheric monitoring and interference detection. This study identifies GNSS signal anomalies associated with scintil...

Self‐Powered SWIR Photodetector Based on Se 0.2 Te 0.8 Thin‐Film Heterojunction

ABSTRACT High‐performance short‐wave infrared (SWIR) photodetectors typically rely on single‐crystalline germanium and III–V semiconductors. However, their high material costs and complex fabrication requirements hinder large‐area integration and cost‐effective SWIR technologies....

Recent Advances in Infrared‐to‐Visible Upconversion Photodetectors: From Multi‐Dimensional Innovations to Future Perspectives

ABSTRACT Thin‐film infrared‐to‐visible upconversion photodetectors (UCDs) have emerged as a cost‐effective, pixel‐less paradigm for infrared (IR) visualization. This review first elucidates mainstream upconversion modalities, device configurations, and the physical principles of...

High‐Energy, 4‐kW Peak‐Power, Single‐Frequency Nanosecond Fiber Amplifier at 2.7 µm

ABSTRACT Single‐frequency (SF) pulsed lasers in the mid‐infrared (MIR) spectral region are highly demanded for applications in spectroscopy, LIDAR, and nonlinear frequency conversion, yet scaling their pulse energy and peak power while maintaining robust SF operation remains chal...

Broadband Photodetectors and Imaging Arrays Based on PtSe 2 /Si Heterojunctions

ABSTRACT Short‐wave infrared (SWIR) photodetectors are of great importance for applications such as optical communications. However, due to the bandgap limitation of silicon (Si) and the poor compatibility of many SWIR photoactive materials with conventional integrated‐circuit pr...

Heavy‐Halide Coordination and Lattice‐Confined Molecular Alignment Enable Giant Birefringence in Hybrid Metal Halides

ABSTRACT High‐birefringence materials are essential for polarization optics, yet it remains difficult to translate anisotropic molecular building blocks into a strong directionally accumulated crystal‐scale optical anisotropy. Here, we establish a hybrid metal halide engineering...