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Researchers at ETH Zurich have developed a groundbreaking plasmonic phase modulator capable of achieving terahertz speeds for wireless communication. Utilizing the interaction of light and metal surfaces – a field called plasmonics – the device employs gold slots and a nonlinear organic material to convert radio frequencies to optical signals at 1.14 THz. While signal degradation begins around 1 THz, this represents a significant advancement over traditional GHz-level electro-optic modulators and paves the way for faster wireless data transmission.