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InAs nonlinear metalens for focused terahertz pulse generation

Jung, Hyunseung; Addamane, Sadhvikas J.; Luk, Ting S.; Harris, Charles T.; Subramania, Ganapathi S.; Brener, Igal; Mitrofanov, Oleg

We demonstrate an InAs-based terahertz (THz) metasurface emitter that can generate and focus THz pulses using a binary-phase Fresnel zone plate concept. The metalens emitter successfully generates a focused THz beam without additional THz optics.