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The terahertz (THz) band (0.1–10 THz) remains the final frontier of the electromagnetic spectrum — long constrained by limited material platforms and physical mechanisms compared to the well-developed microwave and optical domains. In this talk, I will present a new approach that enables efficient and versatile generation of THz waves with the potential for nanoscale control over. This technique harnesses hot-carrier generation in nano-metals, a phenomenon traditionally viewed as a fundamental obstacle towards the real-world application of plasmonic systems.
I will demonstrate how hot carriers can enable efficient, high-frequency THz emission with tunable wave characteristics with nanoscale precision. Building on this foundation, I will showcase the capabilities of this new THz source for spectroscopy applications. Finally, I will discuss the potential of our platform toward realization of coherent, high-speed optoelectronic systems and THz photonic circuits — bringing the vision of ubiquitous, coherent THz technology closer to reality.
