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Researchers at Tohoku University have developed a tunable filter for terahertz wave signals, enhancing transmission rates and signal quality, which is crucial for applications in communication, medical imaging, and industrial analysis. Terahertz waves, falling between microwave and infrared frequencies, offer high potential for data transmission, but face challenges in practical applications due to the need for precise filtering to avoid signal interference.
The breakthrough involves a frequency-tunable filter based on a Fabry-Perot interferometer, utilizing finely structured gratings that can be adjusted for varying refractive indices. This innovation allows for selective transmission of desired frequencies, surpassing the capabilities of traditional systems. The research also indicates the filter’s compatibility with next-generation (6G) mobile phone signals.
Beyond telecommunications, terahertz waves can penetrate materials, making them ideal for scanning and imaging in medical and industrial fields, such as security systems and quality control processes. The team’s work represents a significant advancement in actively controlling and filtering terahertz waves, potentially leading to broader applications across various sectors. The findings were published in Optics Letters, marking an important step forward in harnessing terahertz technology.
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