Over the past few decades, engineers have developed various devices that can create holograms, three-dimensional (3D) or two-dimensional (2D) images produced by precisely controlling the shape and ...

A programmable metasurface stamps temporal codes onto ambient radio waves, enabling passive radar to detect and track drones with active radar precision and zero dedicated transmission. (Nanowerk ...

Metasurfaces are two-dimensional (2D), nanoengineered surfaces that interact strongly with electromagnetic waves and can control light with remarkable precision. These ultra-thin layers can be used to ...

Metasurfaces can help innovate traditional estimation algorithms as an excellent alternative to phased arrays. Direction of arrival (DoA) estimate is an important research area in array signal ...

Folded lens system Strategically positioned metasurfaces fold the light trajectory diagonally within a glass substrate, maintaining optical paths while significantly ...

Abstract: Terahertz (THz) communication is a rapidly advancing field with applications spanning space exploration, wireless communication, and security checks. Achieving effective intensity modulation ...

Metasurface-based terahertz (THz) modulators, which carry information by changing the spatial pattern of the metasurface at every symbol time, are an important component to establish low-cost ...

Abstract: Index modulation (IM) is one of the candidate technologies for the upcoming sixth-generation (6G) wireless communications networks. In this letter, we propose a space-time-modulated ...

Densely integrated photonic circuits enable scalable, complex processing of optical signals, including modulation, multiplexing, wavelength conversion, and detection. Directly interfacing such ...

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