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First photonic time crystal halves terahertz losses: gold metamaterial opens route to new lasers

Photonic time crystal research achieved a world first on July 29, 2026: scientists from École Polytechnique, Collège de ...
IEEE

Pulsed Active Sonar Using Generalized Sinusoidal Frequency Modulation for High-Speed Underwater Target Detection and Tracking

Abstract: For decades, the soft-kill strategy which detects high-speed underwater targets with passive sonar and attract the targets using decoys has been used. However, recently, the paradigm to ...