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This study provides an in-depth examination of recent advancements in next-generation terahertz (THz) imaging and sensing technologies and their increasingly transformative impact across healthcare diagnostics and security-related applications. It focuses on how emerging THz systems, enabled by significant progress in quantum cascade lasers (QCLs),...

Energy harvesting sensor solutions are emerging as a foundational layer for large-scale ambient IoT, enabling autonomous, battery-free sensing across distributed and infrastructure-intensive environments. By converting ambient energy sources such as light, heat, vibration, and RF into usable power, these sensors eliminate the need for wired power a...