Photonics-aided THz system for integrated secure communication and radar jamming

Integrated systems that combine secure communication with radar jamming are crucial for future intelligent transportation and electronic warfare. This paper experimentally demonstrates a photonics-aided terahertz (THz) integrated sensing and communication (ISAC) system, which provides simultaneous secure communication and cooperative radar deception using a dual-encrypted orthogonal frequency-division multiplexing (OFDM) waveform. The system achieves integrated security protection for both communication and sensing links based on a communication-sensing-encryption (C-S-E) joint waveform. Secure communication is achieved via chaotic encryption with a key space as large as 10¹¹⁴, while radar deception is realized by a phase-encryption model that generates false range targets. Over a 3-m wireless link at 313.2 GHz, the proposed system achieves a 105.8-Gbps data rate and supports multi-user detection with 7-mm radial ranging resolution. Therefore, the proposed scheme effectively degrades adversarial radar detection while enhancing communication security, making it particularly suitable for short-range, high-precision secure ISAC systems.