We present a compact high-speed electro-optical modulator based on a thin-film lithium niobate platform for continuous-wave wireless-to-optical signal conversion, which collects terahertz signals between 82-380 GHz directly from free space via a large aperture on-chip antenna.

We present an integrated photonic chip based on a thin-film lithium niobate platform that measures the autocorrelation function of coherent and non-coherent states of the terahertz electric fields with sub-cycle temporal resolution.

We discuss recent progress in miniaturizing terahertz devices, facilitated by integrated photonic circuits. We show these provide ways to engineer dispersion, achieve field enhancement and realise complex functionalities on a single chip.