Tie Jun Cui

Jun 3, 2024 | nature.com | Quan Wu |Wen Wei |Shao Wang |Shi Dai |Qian Ma |Tie Jun Cui | +3 more

Intelligent voice interaction offers a flexible and powerful way to connect individuals with smart devices beyond our expectations. The real-time nature of voice communication enables smart devices to comprehend the user language, execute the corresponding instructions, and facilitate seamless communications, transforming our lives in unprecedented ways. Owing to self-adaptive and reprogrammable functionalities, information metasurface (IMS) opens up a new avenue for smart home and smart cities. To further enhance the intelligence of IMS, we propose an IMS system via intelligent voice interaction and information processing. The voice interaction enables the efficient remote control on the IMS in a flexible, convenient, touchless manner. Leveraging speech recognition, speech synthesis, target detection, and communication technologies, the IMS system achieves automatic beam manipulation capabilities for wireless information transmissions and wireless power transfers. The IMS system is designed to operate in two distinct modes: instruction mode, wherein the user instructs the operations, and autonomous mode, wherein the automatic detections govern the actions, in which seamless mode switching through the voice commands is supported. Users can flexibly achieve precise control over the functions of the intelligent metasurface system through voice interaction at a distance, without the need for close-range manual touch control, which greatly simplifies the operation difficulty and is particularly suitable for remote control and complex application scenarios. A series of experiments, including wireless video transmissions and wireless power transfers are conducted to demonstrate the flexibility and convenience of the IMS system. The incorporation of intelligent voice interaction technology with the IMS presents a novel paradigm for the applications of programmable and information metasurfaces.

May 7, 2024 | nature.com | Tie Jun Cui

Apr 16, 2024 | link.aps.org | Shuo Liu |Tie Jun Cui

Dynamic beamforming is a critical technique in applications like radar detection, holographic imaging, and reconfigurable intelligent surfaces (RIS). Current approaches to dynamic beamforming rely heavily on active components (e.g., PIN diodes, varactor diodes), leading to substantial cost challenges in large-scale deployments, particularly at millimeter-wave and subterahertz frequencies, where these components are prohibitively expensive or unavailable.

Feb 24, 2024 | iopscience.iop.org | Liang Xu |Xin Zhang |Wei Jiang |Tie Jun Cui

Article and author information 10.1088/1361-6463/ad5020 Abstract Programmable metasurfaces show enormous potential in real-time electromagnetic (EM) manipulation and their stable responses for variable EM waves including incident angle and polarization changes is crucial for related applications.